Conditional and loop constructs

Conditional and loop constructs

In SQL Server 2008, conditional and loop constructs can be used to control the flow of execution in a script or stored procedure.

The conditional construct used in SQL Server is the “IF” statement, which evaluates a condition and executes a block of code if the condition is true. The basic syntax of the IF statement is as follows:

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IF condition BEGIN -- Code to be executed if the condition is true END

Multiple conditions can be evaluated using the “ELSEIF” statement, which is used in conjunction with the “IF” statement. The “ELSE” statement can be used to execute code if none of the conditions are true.

The loop construct used in SQL Server is the “WHILE” statement, which executes a block of code repeatedly as long as a condition is true. The basic syntax of the WHILE statement is as follows:

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WHILE condition BEGIN -- Code to be executed repeatedly as long as the condition is true END

The “BREAK” statement can be used to exit the loop prematurely, while the “CONTINUE” statement can be used to skip to the next iteration of the loop.

These constructs can be used in combination with SQL Server’s other programming constructs, such as variables, functions, and stored procedures, to create complex scripts and applications.

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