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Sql 1999 hat case als funktion f261 in core sql aufgenommen und damit verpflichtend gemacht.

Select case sql. The sql case statement the case statement goes through conditions and returns a value when the first condition is met like an if then else statement. Runs one of several groups of statements depending on the value of an expression. Select case statement visual basic 07 20 2015.

In sql server sql server ist für case ausdrücke nur eine schachtelung von 10 ebenen zulässig. If there is no else part and no conditions are true it returns null. Select case anweisung select case statement.

Select case testexpression select case testexpression. Case can be used in any statement or clause that allows a valid expression. Der case ausdruck wurde mit sql 92 im fortgeschrittenen level eingeführt.

It can be used in insert statement as well. We can use a case statement in select queries along with where order by and group by clause. De facto alle sql produkten unterstützt diese funktion heutzutage.

Der case ausdruck kann nicht verwendet werden um den ablauf bei der ausführung von transact sql anweisungen anweisungsblöcken benutzerdefinierten funktionen und gespeicherten prozeduren zu steuern. So once a condition is true it will stop reading and return the result. Runs one of several groups of statements depending on the value of an expression.

For example you can use case in statements such as select update delete and set and in clauses such as select list in where order by and having. The case statement in sql returns a value on a specified condition. The case statement goes through conditions and return a value when the first condition is met like an if then else statement.

In this article we would explore case statement and its various use cases. Sql server sql server allows for only 10 levels of nesting in case expressions. Führt eine von mehreren gruppen von anweisungen aus abhängig vom wert eines ausdrucks.

If no conditions are true it returns the value in the else clause. Executes one of several groups of statements depending on the value of an expression. Select case anweisung visual basic select case statement visual basic 07 20 2015.

Führt eine von mehreren gruppen von anweisungen aus abhängig vom wert eines ausdrucks. So once a condition is true it will stop reading and return the result.

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