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15 wrz 2008 · 30 Answers. Sorted by: 2052. 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.
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 optional ELSE keyword introduces another Transact-SQL statement that is executed when the IF condition isn't satisfied: the Boolean expression returns FALSE .
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.
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.
28 cze 2024 · Else Składnia i reguły w SQL. Składnia: IF <Condition> {Statement | Block_of_statement} . [ ELSE . {Statement | Block_of_statement}] zasady: Warunek powinien być Wyrażenie logiczne, czyli warunek po ocenie daje wartość logiczną.
30 lis 2019 · Składnia T-SQL If Then Else wygląda następująco: --tomaszkenig.pl. IF Boolean_expression_1. {...polecenie wykonywane, gdy warunek_1 jest spełniony - ma wartość TRUE...} [ ELSE IF Boolean_expression_2 . {...polecenie wykonywane, gdy poprzedni z warunków nie jest spełniony, a bieżący jest spełniony - wszystkie powyższe warunki = FALSE...}] [ ELSE
Imposes conditions on the execution of a Transact-SQL statement. 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.