Example of recursive calling of stored procedures in SQL Server: SQL Server Stored Procedure

Example of recursive calling of stored procedures in SQL Server: SQL Server Stored Procedure

Recursion refers to the situation where a code snippet calls itself. The danger lies in how to prevent it from repeatedly calling itself if it calls itself once. That is to say, recursive tests are provided to ensure that exceptions can be obtained when appropriate.

A class is used as an example to describe recursive calls in a stored procedure.

Recursion

Create proc [dbo]. [usp_spFactorial] @ InputValue INT, @ OuputValue int outputasbegin declare @ InValue INT; DECLARE @ OutValue INT; IF (@ InputValue! = 1) begin set @ InValue = @ InputValue-1; EXEC spFactorial @ InValue, @ OutValue OUTPUT; SELECT @ OuputValue = @ InputValue * @ OutValue; end else begin set @ OuputValue = 1; ENDEND

When this stored procedure is created, a report is displayed.