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15 wrz 2008 · The CASE statement is the closest to IF in SQL and is supported on all versions of SQL Server. SELECT CAST ( CASE WHEN Obsolete = 'N' or InStock = 'Y' THEN 1 ELSE 0 END AS bit) as Saleable, * FROM Product. You only need to use the CAST operator if you want the result as a Boolean value.
3 wrz 2024 · Imposes conditions on the execution of a Transact-SQL statement. The Transact-SQL statement that follows an IF keyword and its condition is executed if the condition is satisfied: the Boolean expression returns TRUE.
The IF...ELSE statement is a control-flow statement that allows you to execute or skip a statement block based on a specified condition. The following illustrates the syntax of the IF statement: BEGIN . { statement_block } END Code language: SQL (Structured Query Language) (sql)
28 maj 2024 · Within SQL SELECT, we can use the WHEN-ELSE statement instead of the traditional IF-ELSE. It evaluates a condition and returns a specific value depending on the outcome.
The SQL CASE Expression. The CASE expression goes through conditions and returns a value when the first condition is met (like an if-then-else statement). So, once a condition is true, it will stop reading and return the result. If no conditions are true, it returns the value in the ELSE clause.
21 maj 2024 · The Transact-SQL statement (sql_statement) following the boolean_expression is executed if the boolean_expression evaluates to TRUE. The optional ELSE keyword is an alternate Transact-SQL statement that is executed when boolean_expression evaluates to FALSE or NULL.
12 wrz 2022 · Learn how to build conditional logic when writing SQL code using IF, BEGIN, END, ELSE, and ELSEIF logic.
