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15 wrz 2008 · SELECT CASE WHEN <test> THEN <returnvalue> WHEN <othertest> THEN <returnthis> ELSE <returndefaultcase> END AS <newcolumnname> FROM <table> You can even put case statements in an order by clause for really fancy ordering.
The IF ELSE statement. When the condition in the IF clause evaluates to FALSE and you want to execute another statement block, you can use the ELSE clause. The following illustrates the IF ELSE statement: IF Boolean_expression.
12 wrz 2022 · SQL ELSEIF and ELSE Condition Like many other programming languages, T-SQL can pair the IF keyword with ELSE IF and ELSE to more easily check multiple mutually exclusive scenarios. When combined, the first statement must be a single IF statement.
Conditions in SQL - IF / ELSE. Written by Andy Brown. In this tutorial. Syntax of a simple IF statement. Multiple IF conditions using ELSE. The importance of indentation. Example - using EXISTS to see if records exist. Example - using variables to compare two counts. CASE WHEN is nearly always better.
The CASE expression in SQL server allows us to apply if-then-else logic in a SQL statement. A CASE consists of a number of conditions with an accompanying custom result value in a case body followed by an optional ELSE clause.
This tutorial shows you how to use the SQL Server CASE expression to add if-else logic to SQL queries with many practical examples.
26 maj 2024 · In SQL, the IF statement facilitates conditional execution, enhancing the ability to tailor queries based on specific criteria. This tutorial delves into the syntax, examples, and advanced usage of the IF statement, demonstrating its versatility in SELECT, UPDATE, and INSERT INTO statements.
