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11/29/2023 0 Comments Sexy high slit dressHigh heels or platform heels are also great accessories to a revealing outfit. You can never go wrong with a sexy pair of thigh-high stockings that will draw attention to your legs and complement your dress. You can easily dress it up or down depending on what you wear with it. One of the best things about revealing dresses is their versatility and how easy they are to style. There are so many options to choose from when it comes to revealing dresses, so you’ll easily find one that highlights and shows off your best features. Start by choosing the part of your body you want to show off, then find a sexy, revealing dress or skimpy outfit that exposes that area. Don’t hesitate to show off your amazing body. How to Dress More RevealingĪ revealing outfit can be the perfect way to grab a man’s attention. Skimpy outfits have very little material but will usually cover the intimate parts of the body. Skimpy outfits and revealing dresses are very similar - women wear skimpy outfits and revealing dresses to show off their gorgeous bodies and draw attention to their best features. These dresses reveal bare skin and are a good way to accentuate your curves if the cut-outs are in the right place. Cut-out dresses are also a very popular option. See-through and mesh dresses are also becoming more and more popular, and are perfect if you want to show off your beautiful body. They can also be longer styles, with high slits to reveal your gorgeous legs. Most revealing dresses will be very short, not covering much more than your butt, but they don’t have to be short to be revealing. There are a few different ways a dress can be revealing. Fashion models and celebrities alike have been following the revealing dresses and skimpy outfits trend - with very low V-neck dresses and long dresses with revealing slits being among some of the popular choices. They have been filling magazines and runways to show off the beauty of the female figure. Revealing dresses have been increasingly popular over the last couple of years. Revealing dresses and skimpy outfits are a great way to help you feel your sexiest self and give you that boost of confidence. Naomi Campbell’s Black Grecian GownĪnd here’s Naomi Campbell and her super-toned thighs at a 2011 fashion show where she rocked the trend way before anyone else.Nothing turns heads more than a sexy, revealing outfit. Rita Ora’s sexy thighs at the 2014 MTV Video Music Awards held at The Forum in Inglewood, California, on Aug12. Rita Ora’s Donna Karan Atelier Red Silk GownĮven with all the flowing fabric on Rita Ora‘s Donna Karan Atelier gown at the 2014 MTV VMAs, it still barely covered her neckline, back, legs, and hips. Lily Aldridge showed off her legs and lace underwear 11. Lily Aldridge at the Sports Illustrated Swimsuit Issue 50th Anniversary Party held at Swimsuit Beach House in New York City on February 18, 2014 Lily Aldridge wearing lace underwear underneath her Thakoon spring 2014 open-wrap skirt can be considered a modest approach to this trend. Lily Aldridge’s Thakoon Spring 2014 Midriff and Wrap Skirt Sevyn Streeter’s hip bones at the 2014 BET Awards held at the Nokia Theatre L.A. Sevyn Streeter in a double-slit maxi skirt was the other celebrity to air out her hip bones on the 2014 BET Awards red carpet. Sevyn Streeter’s Flutter Halter Top and Double-Slit Maxi Skirt Keke Palmer paraded her sexy legs at the 2014 BET Awards held at the Nokia Theatre L.A. Keke Palmer’s Alon Livne Spring 2014 Hip-Cutout Dressīeing one of the two celebrities who flaunted their pelvic bones at the 2014 BET Awards, Keke Palmer in an Alon Livne hip-cutout dress sealed this trend’s status as an official Hollywood fashion obsession. Kendall Jenner’s pelvic bone cleavage at the 2014 MuchMusic Video Awards in Toronto, Canada, on J8. “W hy do one slit when you can do two?” - Kendall Jenner asked rhetorically in an Instagram picture post of the Fausto Puglisi double-slit gown she wore to the 2014 MuchMusic Video Awards. Kendall Jenner’s Fausto Puglisi Fall 2013 Double-Slit Gown Rumer Willis showed off her pink underwear at ELLE’s 5th Annual Women in Music concert celebration presented by CUSP by Neiman Marcus in honor of the magazine’s May “Women in Music” issue held at Avalon Hollywood in Los Angeles, California, on Ap7. Rumer Willis followed suit in an extreme cutout skirt that gave more than a peek at her pink underwear. Rumer Willis’ Franziska Fox Fall 2014 Cropped Sweater and Cutout Skirt Paris Hilton without underwear at her birthday party at Greystone Manor in Los Angeles, California, on Febru6. She may look like Barbie, but she’s no doll: Paris Hilton flashed her naughty bits during her 33rd birthday party in an Alon Livne gown with a waist-high slit. Paris Hilton’s Pink Alone Livne Shaped-Bodice Gown Iggy Azalea’s pelvic bone cleavage at the 20th MTV Europe Music Awards held at Ziggo Dome in Amsterdam, Netherlands, on Novem5. 11/29/2023 0 Comments Buran shuttle reaerNASA’s space shuttle program was famous worldwide for its triumphs and tragedies. The Buran spaceplane never lived up to its potential after it was overcome by political and economic forces beyond its designers’ control. This new and outstanding fact in the space exploration was gained brilliantly by the science and the Soviet technology.Surprising Story of the Forgotten Soviet Space Shuttle Close It was the first and until now the only landing in automatic mode of a shuttle in the aerospacev history. The on-board system was also created as an improved in comparison with the existing American shuttle.Ĭertainly for past years 'Space-Shuttle' has been exposed to numerous updates but it has a main advantage compared to 'Buran': it flies. and to another - has enabled our designers to take into account all foreign miscalculations and mistakes. It has allowed on one hand to apply more modern methods of designing, materials, manufacturing technologies, test methods etc. But it is necessary to remember that "Buran" was created after 'Space-Shuttle' with a break of more than 5 years. In its maximum configuration (8 booster rockets), the payload that can be put into orbit could reach the 200 tons.Ĭertainly the 'Buran-Energiya' system is the more effective space complex. This modularity was made possible by the addition of auxiliary booster rocket from 4 to 8 all around the rocket, and by a more powerful and ecological liquid propellant (oxygen and hydrogen) instead of N 2O 4/UDMH as it is used on Proton launchers. Energia is part of a very modular launcher family based on same technicals characteristics wich allow them to be complementary. It was planned to be used, with the shuttle, or with other loads, placed on the side (like Polious) or in the nose cone. The launcher Energia ("Энергия" in Russian means "Energy") whose development started with the Buran project was not conceived only for it. Thus, many differences separate this 2 orbitors, here are some: the Buran shuttle have a higher orbital and deorbital carrying capacity, its 2 engines at the rear enables it to fly during the re-entry in the atmosphere, it is equipped with a more powerful heat shield, but the main difference is that Buran can fly in automatic mode without any pilot on-board, from the takeoff of the rocket to its landing on the tarmac. Unfortunately, the total cost of the program (16.4 billion roubles in 1992) definitely ran out of steam the wavering economy of the USSR, the project was finally stopped in 1993 due to lack of credit.Īlthough very similar by its appearance with the American shuttle, the laws of physics are the same ones for all, the space shuttle Buran ("Буран" in Russian means "Snowstorm") is entirely of Soviet design, from the mechanics to the electronics. The greatest scientific and industrial centers of the country took part in it. During 18 years, more than 1 million people in 1286 companies and 86 ministries and departments directly worked on the project. This program was the most ambitious project of the history of the Soviet space conquest. Indeed, the american shuttle was seen by the Soviet leaders as a formidable military asset, so they decided to create one. The Buran-Energia project was created at the beginning of the seventies to counter the American shuttle. Buran space shuttle and the Energia launcher 11/28/2023 0 Comments Contraction timing active labor(NICE, 2017) This page was last reviewed in August 2018. Then you’ll be on to the second stage of labour, which will last until you have your baby, normally for two to three hours at the most. It’s absolutely fine, of course, if you do change your mind but if you do want to still avoid pain relief, it is possible to use self-help methods like hypnobirthing instead. If you want to give birth without pain relief, this might also be the part when you find it the trickiest to stick to your plan. If this happens to you, don’t worry: it’s totally normal. Toward the end of the first stage of labour, your cervix will be about 7cm to 8cm dilated.Ī lot of women find this the hardest, most painful part of giving birth and you might feel like you are out of control. (NICE, 2017 Which?, 2018) First stage of labour: what happens at the end Ask about your baby’s movement in the last 24 hours.Possibly conduct a vaginal examination and record your pulse, blood pressure and temperature.Ask you about the length, strength and how often your contractions are coming.(WHO, 2013) First stage of labour: how it will progress Supporting you while you try different positions.Helping you with relaxation and breathing techniques.Speaking to you about pain-relief options.Getting you those crucial energy-boosting drinks and snacks.Massaging your back (if you can bear it… some women can’t).Encouraging you (especially through contractions…) and reassuring you.Speaking to midwives or doctors if you’re not able to.Things your birth partner can do to help you are: Having a supportive birth partner can give you a sense of control, comfort and competence and make complications less likely (Hodnett et al, 2013). When your contractions start coming every five minutes and last at least 60 seconds, give your midwife a call (NHS Choices, 2017). manage the pain with paracetamol (if needed).ask your birth partner to rub your back.do some relaxation or breathing exercises.drink a lot of fluids and healthy snacks.In the early part of labour, you’re likely to be at home. (NHS Choices, 2017) First stage of labour: managing pain at home Your midwife will then ask questions and assess you based on your:Ĭall your midwife or a doctor straight away if: So before you head off anywhere, give them a call. Your midwife will know how far on you are and whether you need to be in hospital or at your birthing centre yet. Early labour pain management and calling your midwife Unlike Braxton Hicks, they don’t go away when you change your position or relax. The contractions you’ll experience during established labour are different from the Braxton Hicks contractions (false contractions) that you probably felt while you were pregnant. Contractions versus Braxton Hicks contractions In light of the nurse's observations regarding the contractions and the client's knowledge of the physiology and mechanism of labor, how should the nurse respond? 1 "I can't make a decision on that I'll have to ask your primary healthcare provider." 2 "Please stay in bed walking could interfere with effective uterine contractions." 3 "It's all right for you to walk as long as you feel comfortable and your membranes are intact." 4 "You may sit in a chair, because your contractions cannot be timed when you walk and I won't be able to listen to the baby's heart.The good news is that contractions will come and go so – if you can – try and relax in between them (WebMD, 2018). The client is cheerful and relaxed and asks the nurse whether it is all right for her to walk around. The fetus is at +1 station in occiput anterior position, and the membranes are intact. Vaginal examination reveals that the cervix is dilated 3 cm and 75% effaced. She and her partner attended childbirth preparation classes. A primigravida is admitted to the birthing suite at term with contractions occurring every 5 to 8 minutes and a bloody show present. 11/28/2023 0 Comments Betta fish feeder vacationYour Betta fish secrets ammonia and releases toxic waste into the water. If you are just going away for 1 week or over the weekend then just do the 25% water change as you would do weekly. If you will be going away for 2 weeks then 50% change of water. H ere are my recommended heater products.īefore you go for your planned vacation, it would be best to clean your aquarium and at least make at 50% change of water. Their metabolism will be affected and will not be functioning efficiently. If the water is too cold the betta fish may not be active and it may lead to illness. I also advise not to buy an inexpensive heater or temperature control device since it might cause some short circuit or improper temperature regulation. The climate in those countries averages around 22 to 26 degrees Celsius so it is imperative to keep the temperature constant or approximately within those ranges. As I have mentioned that you absolutely need a heater to regulate the fish tank.Īs I have mentioned before that the betta fish normal habitat is in Thailand, Cambodia, Vietnam, Laos or Indonesia. You have to make sure that the temperature of the fish tank is properly regulated. I have a recommended good quality fish feeder. It might jam and won’t dispense any fish food thereby, starving all the fishes in the fish tank and risk the chance of killing all of them. It might dispense everything which will lead to water pollution and killing everything inside your fish tank. You have to keep in mind that there is a lot of inexpensive fish feeder and sometimes it may malfunction. If you do not want to inconvenience your friend or anyone goes to your place while you are away then it would be wise to buy an automatic fish feeder. If you are very meticulous on the color quality and health of the betta fish, a 7-day pill box is recommended where you place the different type of foods on each day for your beloved betta fish. You can always utilize a small pillbox or just give the betta fish food container and drop 1 or 2 pellets every day to the betta fish. If you have a friend or cleaner who comes to your place to watch or organize things while you are away can be instructed to feed your betta every day or every other day when he or she comes to your place. The vinegar is used to disinfect the guppies since they might be carriers of the disease. Since the guppies are found in the canals, they are sometimes left in vinegar water containing tanks and then moved to your fish tank. In Asia where there are tons of guppies on the canals, rivers and everywhere then this is the preferred method. Sometimes it is also recommended buying small feeder food for the fish like small guppies which is practiced in the old school method. 7 days and even 14 days slow-release vacation food. Some vacation food that is sold in the pet stores has different types. However, there is some vacation food that is sold in pet stores and can release the nutrients slowly into the water and this is fine. If you are away just for the weekend or at most 5 days to 7 days then it is fine that you can keep your betta fish without food, you just have to feed it well the day that you are leaving. This will increase stress and will lead to illness. And if it is extended into a week it will go into the starvation mode which is not good. Normally if the betta fish goes into the 5th and 6th day without food the body will be using the stored reserves. Sometimes there is an abundant supply of insects such as the mosquito larvae and water bugs.Īt times, they have to wait for the right opportunity in obtaining their food. Because in the wild they are mostly predators on insects. There are several things that you must be aware of.Īs I have mentioned in the guide to betta fish food and feeding guide, the betta fish can eat without food for up to 2 weeks without any problems. When you are planning to go for a week or 2 weeks long vacation. Betta Fish Care While You Are On Vacation 11/28/2023 0 Comments Skip hop activity gymThere is a leaf shaped cushion, which is perfect for supporting my baby during important tummy time sessions. On one side of the play mat, there is a crinkle leaf, which provides a great sensory experience for baby. The baby gym has the perfect balance of developmental activities for baby’s needs, without being over-stimulating. It combines 17+ activities for baby to enjoy and explore, my little boy loves lying on his back and looking at himself in the mirror, which is attached to the overhead canopy. There are also 4 toys, which can also be attached to the canopy and removed if baby wants to play with them: a monkey with squeaker and banana teether a crinkly leopard a toucan with rattle and grasping ring and a sloth soother. My little boy absolutely loves the monkey toy, as it contains a squeaker and a banana shaped teether – which is forever in his mouth. Will only attach one way. It would be worthwhile attaching the mirrorīefore putting the canopy up, so you can put it up correctly the first time round. Point that I realised that I had put the canopy upside down – as the mirror Under the canopy arch, directly underneath the fabric tabs. Play mat – which is straightforward, but it then tells you to attach the mirror Way. The instructions tell you to insert the canopy hooks underneath the Fun sounds encourages learning and engages your little one. The product is well packaged, with most of the packagingīeing able to be recycled – which is a bonus! The baby gym was fairly easy toĪssemble, although I did struggle to put the overhead canopy in the correct Perfect for playtime, this activity gym features sweet, plush animals and icons baby will love. However the Skip Hop Tropical Paradise Activity Gym and Soother is definitely With toggles and squeaky bits, to baby gyms with built in piano keyboards, I have tried several baby gyms/mats, from the basic play mat The opportunity to review the Skip Hop Tropical Paradise Activity Gym and Rated 4.92 out of 5 based on 24 customer ratings. .uk: Skip Hop Activity Gym 30 results for 'Skip Hop Activity Gym' Skip Hop Baby Play Gym, Garden Oasis, Green Multi 4. Silver Lining Cloud Wooden Activity Gym Skip Hop Baby Promotions. Always Ships Free 4.5 out of 5 Customer Rating. Silver Lining Cloud 2-in-1 Activity Floor Seat Skip Hop Skip Hop Promotions. Shop our Baby Gyms, Play Mats, Musical Toys. Skip Hop Baby Activity Center: Interactive Play Center with 3-Stage Grow-with-Me Functionality, 4mo+, Silver Lining Cloud. SKU: skip-hop-treetopfreinds-activity-gym Categories: Baby Play Time, Baby Toys, Newborn Plus. Find infant toys from Skip Hop to encourage movement and play. I have a two-year-old and a 3-month-old, so when I was given Skip Hop Wooden Baby Gym, Silver Lining Cloud Activity Gym. Cycling is mainly an aerobic activity, which means that your heart, blood vessels and lungs all get a workout. 11/28/2023 0 Comments Crunch locations upper east side“With employees that come on board with Crunch, we put an emphasis on having a fun and an innovative culture,” Worts said. Not only was it a unique and fun environment to work in, it also possessed an edge to its programming that hadn’t been seen in the industry. Having worked in the fitness industry in New York, Worts had friends over the years that would go work for Crunch for a multitude of reasons. That’s what really drew me to it, and I’ve been fortunate to be here seven and a half years.” It acted like a fun place to build community, to work out, and they are really kind of different. It was interesting to see this business that didn’t really act like a traditional fitness business. “They were always known as a unique and fun brand. “Being in New York all my life, I was always impressed with Crunch and how they separated themselves from the competition,” Worts explained. Worts held the position of COO for about four years until 2010 when he was announced as president. My first role was chief operating officer.” That’s when I became an employee of Crunch. Angelo Gordon ended up purchasing Crunch from Bally’s in January 2006. I was part of a group of people that were helping with the due diligence and looking at the brand. “Crunch at the time was owned by Bally’s, and Angelo Gordon was looking at purchasing Crunch at the end of 2005 from Bally’s. “A friend of mine was interested in looking at Crunch,” Worts said. We got our revenues up to around $40 million and we sold the company three years later.”Īfter the selling of SpaCapital, Worts took some time off, but found himself setting up to enter Crunch after its purchase by Angelo Gordon. A year later we had 1,200 employees, 24 locations in 14 different states. “I was the third employee and we had zero locations. “This was a company that was part of a private equity fund,” Worts explained. My responsibilities grew from a general manager to an area position to a regional position that I held until 2002 … I oversaw 17 clubs between Philadelphia to Boston.”įollowing Worts’ departure from the Fitness Company, he began working for a start-up company called SpaCapital, buying up day spas across the country. We grew from 12 locations to about 80 and we were on the Eastern seaboard, from Boston down to Miami. I worked with the Fitness Company for about 10 years. “I worked in fitness for about six months, then I was promoted to be a general manager at a club we were opening up at the northern end of Times Square,” said Worts. Following graduation, he accepted a job for the Fitness Company which had about a dozen locations in the metropolitan area and Washington D.C. After college he received his master’s degree in Health and Fitness Management at the University of Connecticut. Worts’ experience was perfect for opportunities at growing clubs. The mission was to grow Crunch Fitness corporate in its previously existing markets (California, Miami, New York City), but also launch a franchise model that would allow for international growth. In addition to the purchase by Angelo Gordon, New Evolution Ventures also purchased a stake in Crunch Fitness. Worts grew up in New York watching the Crunch Fitness brand develop into a fitness phenomenon, but when he came aboard he realized that for growth, it was going to take a lot of work. Today Crunch Fitness maintains the same devotion to group fitness, but like the fitness industry, it has evolved to stay relevant to members worldwide.Ī major portion of its relevancy came when Keith Worts, the CEO of Crunch Fitness, came aboard in 2006 after Angelo Gordon purchased the brand from Bally Total Fitness. Whether you want to trace its inception into the industry with aerobics or Jazzercise, one thing is for sure - Crunch Fitness jumped on the bandwagon very early.įounded in the late 80s in New York City, Crunch Fitness was established on the principles of group exercise. Fitness has drastically evolved over the past 20 to 30 years, but nothing has helped that evolution more than the emergence of group fitness. 11/28/2023 0 Comments Walmart 1 hour photo pricesThe average disposable camera has 27 exposures. The cost of developing film and disposable cameras at Walmart ranges from $7.96 (for single prints of 12 exposures) to $18.96 (for double prints of 36 exposures). 4 Where Else Can You Develop Disposable Cameras?.If so, you can feel guaranteed that they will accept your disposable camera for development. Once you’ve found the Walmart location nearest you, call the number listed and ask an associate if they have a Photo Center. To find out if your local Walmart has a Photo Center, use this store locator tool. In order to have your camera developed, you’ll have to find a location that offers this service. While Walmart still offers disposable camera development, not all Walmart locations have Photo Centers. In addition to offering film development, Walmart Photo Center also offers the following photo printing services for digital photos:Ĭheck If Your Nearby Walmart Develops Disposable Cameras So, while you can still develop your disposable camera through Walmart, the film is developed elsewhere and the wait times are longer than they used to be. As of November 2022, Walmart sends out all of their disposable cameras and analogue film to third-party photo labs. Unlike the cell-phone camera of today, disposable cameras harken back to simpler times when gratification wasn’t always instant.īut these days, it can be hard to find companies that still offer film-developing services.ĭespite the overwhelming cultural shift away from analogue photography, Walmart still provides a way for customers to develop disposable cameras through their in-store Photo Centers.īut unlike in years past, Walmart no longer develops their own film in house. If you’re a 90s kid like me, then you probably understand the unique joy and satisfaction of disposable cameras. 11/28/2023 0 Comments Hd projector televisionsThis chart shows how close you need to sit at any given screen size to see the difference. If you're at "retina distance" from your 1080p set now and don't plan on moving your couch closer, upgrading to 4K may not make a big difference to your experience. More importantly, at that same distance, your eyeballs won't be able to squeeze any more detail out of a 4K image than a 1080 one. Get far enough away from a 1080p set and, hey presto, it's a retina display! Remember when Apple made a big fuss about "retina" displays a few iPhones back? "Retina" refers to screens that have sufficient resolution that at a normal viewing distance your eye can't make out individual pixels. How close do I need to sit to a 4K screen? And 4K screens are noticeably sharper than 1080p screens.īut if you're sticking with roughly the same size of television, and are used to sitting pretty close, you may not see that much of a difference – especially if you're still mostly watching HD content rather than 4K video. We're talking about a similar jump in resolution as the one from SD (480 lines high) to HD (1080 lines high). For extra added fun, you also might hear this resolution referred to as 2160p. And before you ask, yes, the industry named 1080 resolution after image height, but named 4K after image width. It's called 4K because the images are around 4,000 pixels wide. Although, if you have the money to spend on a 4K projector, then there’s nothing quite like watching a 300 inch screen.(Image credit: Samsung) Why is it called 4K? 4K TVs overall remain more affordable, accessible, and loaded with features. However, that hasn’t changed the actual difference in these products. In recent years, the cost of a 4K projector has come down and therefore the biggest hurdle is no longer what it once was - even on the best 4K projector models. Over time, 4K projectors have also gotten smarter, but their interface and smarts still trail behind the TV.ĤK TVs still remain the best option for most people. As the industry moves further into the connected home age, you’d be hard-pressed to find a TV without a rich user experience. Then there’s the user experience in general. Furthermore, projectors come with the added issue of the environment impacting on the brightness. However, the brightness and contrast is its downfall compared to LG OLED TVs. LG is the current leader in OLED technology and sells a 4K OLED projector. These are also areas where projectors tend to be limited compared to TVs. Although upscaling is less of a problem now than before, making sure a 4K projector outputs a true 4K picture is something to be aware of before buying, as is brightness and contrast. Instead of offering a true 4K experience, some devices emulate one by taking a lesser resolution and filling in the details. This has resulted in manufacturers relying more heavily on additional technologies including 4K upscaling. Projectors suffer in resolution compared to their TV counterparts. While virtually every 4K TV is actually outputting 4K now, the same is not always the case with a 4K projector. Another con can be the resolution itself. For example, although you can now get a 4K projector for as little as $1000, you can get a 4K TV for less than $500 and for even less during major sales events. While projector prices have dropped in recent times, they have for 4K TVs as well. When it comes to projectors, size matters, and that directly impacts many of the other benefits of the super-sized screen.Ĭost still remains the ultimate 4K projector drawback. If all things are equal, then a 4K projector has the display real estate to better show off the 4K resolution. Another knock-on effect of a larger screen is the resolution. In this sense, a projector is possibly the healthier option, providing you are a suitable distance away from the screen to begin with. Larger screens come with additional benefits including less strain on the eyes. Size and adaptability are not the only reasons to go large either. In contrast, 4K TVs always remain the size they are when you buy them. With a 4K projector, users can adjust the size to match the needs of the room and the occasion. What’s more, it is not just their size, but their adaptability. While 4K TVs tend to rise to around 85 inches, 4K projectors routinely go up to 300 inches. Both TVs and projectors can be purchased in varying sizes, but the difference is their limits. The biggest selling point with a 4K projector is the size. 11/28/2023 0 Comments Mariadb varchar lengthUpdate: Because the exploding popularity of variable-length strings, for example, with the usage of emojis, Oracle has been pushing for improved performance for those cases. Try to be conservative because, unless the table is too large, you can always change the definition later. A VARCHAR(100) is better than VARCHAR(255) (although a VARCHAR(20) would be better), even if you do not know the exact length. So the general piece of advice is to use the smallest type possible, because it can potentially create performance or management problems otherwise. Mysql> SELECT CHAR_LENGTH(REPEAT('ñ', 255)) For example REPEAT('ñ', 255) has more than 2^255 bytes in utf8, so it would require more than 1 byte for storing its length: mysql> SELECT LENGTH(REPEAT('ñ', 255)) Last but not least, as has reminded me, more than 1 byte for the length may be required even if you are using VARCHAR(255), because the definition is in characters, while the length stores bytes. See, for example: error 1118: row size too large. This caused some weirdness between the COMPACT and DYNAMIC formats. That has some consequences in performance (sometimes good, sometimes bad, depending on the usage) that cannot be ignored. So, it is very likely that you won't be able to index fully a VARCHAR(255) field (assuming you use utf8 or any other variable length-encoding).Īdditionally, the maximum inline row size for InnoDB is half a page (around 8000 bytes), and variable-lenght fields like BLOB or varchar, can be stored off-page if they do not fit on the half-page. Index size is restricted to 3072 bytes and single column indexes, to 767 bytes*. It has some consequences for InnoDB, too. All of that because of a poor selection of its defined data type (independently of the contents). Not only this causes unnecessary memory stress, it may provoke the actions to be performed on disk, potentially slowing it down thousands of times. That is almost 1GB on a 1 million table -only for the VARCHAR. If you can think about the wasted space, if we are using MySQL's 'utf8' charset encoding, MEMORY will reserve 2 bytes for the length + 3 * 255 bytes per row (for values that may only take a few bytes on InnoDB). Should we care about those other engines? Yes, we should, because even if we do not use them directly, MEMORY tables are very commonly used for intermediate results (temporary tables on memory), and as the results are not known beforehand, the table has to be created with the maximum size possible - VARCHAR(255) if that is our type. MyISAM has a fixed row size format, and MEMORY tables are always fixed in size. While InnoDB may store a varchar in a dynamic way, that is not true for other engines. So, that means that we should always do VARCHAR(255), shouldn't we? No. That is not true with VARCHAR(256), because then 2 bytes (at least) for the length are always required. And that was possible, because the actual data was not affected by that change. In fact, if I remember correctly, I recall someone modifying the data dictionary with an hexadecimal editor in order to change something like a VARCHAR(50) into a VARCHAR(100), so it could be done dynamically (normally, that requires a table reconstruction). In the standard row formats for InnoDB and MyISAM (dynamic/compact) a VARCHAR(50) and a VARCHAR(255) will store the string text in the same way- 1 byte for the length and the actual string with between 1 and 4 bytes per character (depending on the encoding and the actual character stored). This is a very common "exam/interview question". |
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