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5 maj 2015 · From the manual, it looks like the if function is just a less flexible form of the case expression. For example, you could write: select if(username = 'darxysaq', 'high', 'low') as awesomeness And the equivalent with case: select case when username = 'darxysaq' then 'high' else 'low' end as awesomeness But case is more flexible. It allows more ...
19 lis 2011 · On the other hand, if the CASE construct is an essential part of the query, like: SELECT SUM(CASE WHEN PaidStatus = 0 THEN Amount ELSE 0 END) AS TotalUnpaid, SUM(CASE WHEN PaidStatus = 1 THEN Amount ELSE 0 END) AS TotalPaid FROM ... Don't even try to move this kind logic to the UI, because the database is much better at it.
18 sie 2024 · CASE: Use for conditional logic directly in SQL queries. IF/IF-ELSE: Use for procedural logic and control flow within stored procedures and scripts.
31 maj 2023 · In this post, we'll compare and contrast the usage of IF, IIF, and CASE in MSSQL, which are essential for writing dynamic and conditional SQL statements. IF vs IIF The IF statement and the IIF function serve different purposes and have slightly different syntaxes.
16 gru 2004 · The main difference between the two is that if you use 12 nested ifs, you'll be doing 12 selects, whereas you'll only do one select with the case statement. Try displaying the estimated execution plan for the following code in Query Analyzer and you'll see the difference.
Simple case expressions take a single input expression and then compare it for equality to a series of specific values covered by when clauses. The resulting expression for each value is supplied by a then clause. Else may optionally be used to specify a resulting value for when no match was found. This is easier to see with examples.
Blind SQL injection occurs when an application is vulnerable to SQL injection, but its HTTP responses do not contain the results of the relevant SQL query or the details of any database errors. Many techniques such as UNION attacks are not effective with blind SQL injection vulnerabilities.
