![]() Let's say we enter the expression, and we check the first WHEN clause, and the result is 3 we skip that clause and move on. In turn, what happens is that each WHEN clause evaluates and invokes RAND() independently – and in each case it could yield a different value. WHEN CONVERT(SMALLINT, 1+RAND()*3) = 3 THEN 'three'ĮLSE NULL - this is always implicitly there WHEN CONVERT(SMALLINT, 1+RAND()*3) = 2 THEN 'two' WHEN CONVERT(SMALLINT, 1+RAND()*3) = 1 THEN 'one' How does this happen? Well, the entire CASE expression is expanded to a searched expression, as follows: SELECT = CASE Now, put this into a simple CASE expression, and run it a dozen times – eventually you will get a result of NULL: SELECT = CASE CONVERT(SMALLINT, 1+RAND()*3) Consider that this expression yields a SMALLINT between 1 and 3 go ahead and run it many times, and you will always get one of those three values: SELECT CONVERT(SMALLINT, 1+RAND()*3) When this is a variable, or a constant, or a column reference, this is unlikely to be a real problem however, things can change quickly when it's a non-deterministic function. The reason it is important to understand that the expression being evaluated will be evaluated multiple times, is because it can actually be evaluated multiple times. It is important to understand that this will be executed as a searched CASE expression, like this: SELECT CASE I often see people writing a simple CASE expression, like this: SELECT CASE 1 THEN 'foo' ![]() So, when aggregates or non-native services like Full-Text Search are involved, please do not make any assumptions about short circuiting in a CASE expression. I don't have a repro handy, but I do believe him, and I don't think we've unearthed all of the edge cases where this may occur. On that item, Paul White commented that he also observed something similar using the new LAG() function introduced in SQL Server 2012. For example, Connect #780132 : FREETEXT() does not honor order of evaluation in CASE statements (no aggregates involved) shows that, well, CASE evaluation order is not guaranteed to be left-to-right when using certain full-text functions either. This behavior can yield itself in some other, less obvious scenarios, too. I reported the bug in Connect #690017 : CASE / COALESCE won't always evaluate in textual order it was swiftly closed as "By Design." Paul White ( blog | subsequently filed Connect #691535 : Aggregates Don't Follow the Semantics Of CASE, and it was closed as "Fixed." The fix, in this case, was clarification in the Books Online article namely, the snippet I copied above. I was first made aware of this specific scenario in a conversation on a private e-mail distribution list by Itzik Ben-Gan ( who in turn was initially notified by Jaime Lafargue. There are trivial workarounds (such as ELSE (SELECT MIN(1/0)) END), but this comes as a real surprise to many who haven't memorized the above sentences from Books Online. The official documentation once implied that the entire expression will short-circuit, meaning it will evaluate the expression from left-to-right, and stop evaluating when it hits a match: To use CASE within the same query logic, you would have to use a CASE expression for each output column: SELECTįROM dbo.some_table CASE will not always short circuit This type of control-of-flow logic may be possible with CASE statements in other languages (like VBScript), but not in Transact-SQL's CASE expression. When people think of CASE as a statement, it leads to experiments in code shortening like this: SELECT CASE I find this mildly annoying (like row/record and column/field) and, while it's mostly semantics, but there is an important distinction between an expression and a statement: an expression returns a result. Likely not important to most people, and perhaps this is just my pedantic side, but a lot of people call it a CASE statement – including Microsoft, whose documentation uses statement and expression interchangeably at times. The return expression is always a single value, and the output data type is determined by data type precedence.Īs I said, the CASE expression is often misunderstood here are some examples: CASE is an expression, not a statement
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![]() In MongoDB, when an index cannot be found, every single document inside a collection should be scanned for selecting the document that offers a match to query statement. In the case of MySQL index optimization, when the index has not been defined, database engines are made to scan the complete table for finding relevant rows. ![]() The difference in approach, however, comes when an index is not found or defined. MySQL vs MongoDB : Index Optimizationīoth MongoDB and MySQL use indexes for finding data quickly. The database is schema-free, meaning it allows the mobile app developers to create documents without the need to defining the document structures. In order to better the query speed, it stores related data sets together which are then accessed with the help of MongoDB query language. In the MongoDB database, data gets stored in the JSON-like documents which come with varied structures. The schemas require that the rows inside the table have the same structures, with the values also been represented by specific data types. It uses schema for defining database structure. MySQL database structure stores the data values in tables and makes use of the SQL to access them. Let us look at other difference points that stand between MongoDB and MySQL. While these are the primary point of differences, the list does not end here. Here’s a table of difference highlighting what separates the two databases from each other. Without further delay, let us get started by first looking into the brands that are supporting them individually by basing their database needs on both of them individually.Īlthough this must have given you a very basic idea of where you should be headed in the choice of the database model when planning your mobile app backend development, let us make it all the more clear. In this article, we are going to help entrepreneurs understand how the two models stack up against each other and the situations where one emerges better than the other. To know more about different types of databases, you can read about top database list, and know the trending databases that are utilized by businesses of all sizes and types. In a situation like this, it has become all the more difficult for the entrepreneur to choose one database over another, for, at the end of the day, both come with their fair share of benefits. This new class of non-relational database has brought with itself a stiff competition between the two – a newbie vs a veteran: MongoDB vs MySQL. But with the growing variety and volume of data, new non-relational databases like MongoDB have arisen to attend to the enterprise’s needs of fluid data. MySQL database had become one of the go-to inexpensive options for companies looking for relational database around the globe. ![]() And of course, from third-person to first-person. This guide will detaily explain how to shift from first-person to third-person mode. Serious Sam Collection includes all content from Serious Sam HD: The First Encounter, Serious Sam HD: The Second Encounter and Serious Sam 3: BFE, including The Legend of the Beast and Jewel of the Nile expansions. The Juvenile Antaresian Spider is an enemy that first appears in Serious Sam 3: BFE, and later on in several Serious Sam games Serious Sams Bogus Detour, Serious Sam VR: The Last Hope, and Serious Sam 3 VR: BFE. Serious Sam 3: BFE > Guides > Dallas's Guides. I am currently stuck on level Under the Iron Cloud, i hear a sound of spaceship and a big health bar apperas, like one when you have to fight a boss.Then game freezes. The crash looks strange, as it is in regular code, but it reports 'illegal instructions'. 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And the game sees these folders and files if they were there in the main Serious Sam folder. ![]() Step into the shoes of the legendary action hero Sam "Serious" Stone and experience one of the most explosive shooter game series of all time as you save the world from a merciless alien invasion. Yes, because recording is like playing a multiplayer game that you host for your pc to play on. Inside them are many files and folders, with the exact same path as the files in your Serious Sam folders. When it came to ergonomics, our tester found that the drill was comfortable for long-term use as well. The Ridgid R86001K comes with an efficient carrying case and sports a bright LED light that impressed our tester with its illumination and coverage. With that being said, the Ridged has sufficient torque for drilling pilot holes, driving smaller fasteners, and digging out some harder materials, so it’s a good choice for putting together furniture or installing hardware around the home. Our tester noted that the drill began to stall out with bits at 1 1/2 inches. However, when our tester drilled 2.5-inch deep holes into concrete, the drill did take some time, as it only completed five holes in about a minute. Our tester found that this compact brushed motor drill was successful at driving lag screws and drilling holes of all sizes. The light-duty drill is compact and features an LED light that makes it easy to finish projects in small, hard-to-reach spots. The Ridgid R86001K Cordless Drill/Driver Kit is the best cordless drill for DIYers looking for value and performance. Our tester found that this drill stalled when using bits around the 1 1/2-inch range. Product Details: Voltage: 18/20 volt | Brushed or Brushless Motor: Brushless | Battery: 5 amp-hour battery | Chuck Size: 1/2 inch | Weight: 4 pounds and 13 ounces ![]() Still, they noted this isn’t what they’d be buying such a heavy duty drill for. Their only frustration with the drill came from its clutch, which failed to engage on small screws with softer materials-an issue that could prove problematic with drywall jobs, where the papery surface’s tension contributes to the drywall’s structural integrity. ![]() Our tester was impressed with the M18’s battery pack, which remained fully charged after 50 minutes of intensive use. ![]() However, our tester noted that they found it to have particularly good ergonomics and balance, which made the drill comfortable to use for long sessions in spite of its significant weight. This hammer drill features a contemporary brushless motor and has a long-lasting battery you’re sure to appreciate.Īs you might expect from a hammer drill, the M18 is heavy, at about 5 pounds. Overall, the Milwaukee M18 Fuel 2904-22 is the best cordless drill, whether you’re working in a construction setting or on advanced DIY projects. Drill/Driver includes an operator's manual, Battery and charger.Testers noted that the clutch had some trouble engaging with small screws. Backed by the RYOBI 3-Year Manufacturer's Warranty, this ONE+ HP 18V Compact Brushless 1/2 in. Best of all, it is part of the RYOBI ONE+ System of over 280 Cordless Products that all work on the same battery platform. ![]() single sleeve ratcheting chuck is custom designed with a unique knurling pattern to provide a durable grip for quick bit changes. Other special features include a two-speed gearbox (0-450 and 0-1,700 RPM) and a 24-position clutch for maximum control while drilling and driving. of torque for maximum power when drilling and driving through tough materials. It's also equipped with a brushless motor that delivers up to 400 in./lbs. in length, this tool is 30% more compact and 20% lighter weight than the brushed model, giving you better access to tight workspaces and overhead applications. 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Gifted Student Scholarships (GSS) Program offered by Innovators Support Fund The Innovators Support Fund offers several scholarships to Egyptian students from all governorates who passed Thanaweya Amma or its equivalent certificates, and who achieved outstanding academic results in the fields of basic sciences and technology, to obtain fully. Foundations also always foster contact among their scholarship recipients. ![]() A scholarship helps them finance their studies at home and abroad. Germany has numerous foundations that support students and doctoral candidates. Scholarships are one option for financing a university education The City of Grad Rijeka awards scholarships to gifted third and fourth-class students who attend secondary schools and universities, with the aim of. You might only get 10-20 per cent off the fees, but you might be able to get a bursary on top.Scholarship Programmes for Gifted Students This would be in at least one domain: Levels of giftedness can range from moderate to profound. This would be in at least one domain: Talented or Highly Able students show performance that is in the top 10 of students of a similar age. To apply for a scholarship, gifted students are usually invited to take part in an open exam or test, normally held in the academic year before admission. Gifted students have ability that is in the top 10 of students of a similar age. What kind of house do you live in, what car do you drive, what savings do you have, what size is your mortgage, where do you go on holiday, do both parents work, could you borrow against your house, are there relatives who could help? So be prepared!Ī scholarship is a financial award to a student who shows talent or ability in a particular subject (academic) or area eg. It is means tested, so schools will want to know about all your financial circumstances, not just your take-home pay. It's not just senior schools that offer bursaries plenty of prep schools offer money off the fees.Ī bursary is a financial award that enables pupils to attend schools who otherwise would not be able to afford the fees. According to NAGC’s article on Definitions of Giftedness, the term gifted and talented means students, children, or youth who give evidence of high achievement capability in such areas as intellectual, creative, artistic, or leadership capacity, or in specific academic fields, and who need services or activities not ordinarily provided by. This means you need to ask about bursaries two years before your child is due to start school. It's important to apply in plenty of time the deadline for many awards is often a whole academic year before the start of the course. What is on offer varies greatly so it is essential to contact the school directly. 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There will be a Police presence at this property to assist us with crowd control and traffic.fill out your information and then submit! Super simple!! To signup for emails visit our homepage at simply scroll down to ‘join the list’. if simple driving laws have been disregarded you can be ticketed for those offenses! Do not block driveways, entrances to private streets, park facing the wrong direction or where it has been deemed a no parking zone! You can receive a ticket! Your cooperation in these matters is always appreciated! ! Our local Dallas County Sheriff’s Department will be on hand to assist us this weekend with parking instructions and any neighbor issues.** Address to be released day of sale. There is VERY limited hold area for this Sale so please come with a plan! For serious purchasers please plan ahead with having your own ‘SOLD’ tickets with your full name and phone number PRE-written to save time! 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In this case, the formations may serve solely to gather fine sediments, which females could use to choose their mate, Jordan said.īut until this idea is tested, nobody will know. The formations are very similar to so-called "bowers" - display sites built by various animals like bowerbirds in which to strut their stuff before mating. "It's a nice clean study because it provides a definite answer to the question - something that is very rare in biology," Jordan said. Research describing the pufferfish formations was published in July in the journal Scientific Reports. D shows the same circle one week after spawning. "A" represents the early stage, B the middle stage and C the final stage. One of the circular formations in various stages of completion. The fact that such a small animal makes such a large formation is "pretty cool, and suggests some underlying biological reason for the size, like poor visibility at depth, or distance between individuals that means males have to make large nests to be found by females," he told LiveScience. When Jordan first heard about the circles, he guessed a much bigger fish would have made them. Kawase said they likely give up their old formations because the circles exhaust the fine sediment in the area, and thus must be built anew in areas with fresh sediment. The male pufferfish don't maintain these formations, and underwater currents wash them away relatively quickly. It takes about seven to nine days for the pufferfish to construct the circles. The speed of water was slowed by nearly 25 percent in the center, where the eggs are laid, the study noted. Then, the downstream peaks and valleys funnel the water outward. ![]() A fluid dynamics test using a half-size model of one of these circles found that the upstream portion of the circle funnels water and fine sediments toward the center. Strangely enough, the male "gathers" the fine sediments using the circular pattern itself, Kawase said. ![]() ![]() Third, the male gathers fine sediments to give the resulting formation a distinctive look and coloring, Kawase said. Second, the male decorates these ridges with fragments of shells. First, they involve radially aligned ridges and valleys outside the nest site. For example, male featherfin cichlids in Africa's Lake Tanganyika build small bowls out of the sand, and display them to females before mating there, said Alex Jordan, a researcher at the University of Texas at Austin who wasn't involved in this study.īut this new pufferfish's geometric patterns have three features never seen before. Males of some species of cichlids (a type of fish) are known to construct crater-shaped mounds that females visit to have their eggs fertilized, Kawase said. A male pufferfish making a valley in the seafloor with his fins on April 23, 2012. |
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