Using a stored procedure with no parameters - SQL Server.
If the stored procedure definition contains COMMIT ON RETURN YES, and the stored procedure executed successfully, DB2 commits all changes. The COMMIT statement closes the cursor unless it is declared with the WITH HOLD option. Control returns to the calling application, which receives the output parameters and the result set. DB2 then.
For each OUT or INOUT parameter, pass a user-defined variable in the CALL statement that invokes the procedure so that you can obtain its value when the procedure returns. If you are calling the procedure from within another stored procedure or function, you can also pass a routine parameter or local routine variable as an IN or INOUT parameter.
SQL procedures are more reliable than equivalent external procedures. Support input, output, and input-output parameter passing modes. Support a simple, but powerful condition and error-handling model. Return multiple results sets to the caller or to a client application. Allow you to easily access the SQLSTATE and SQLCODE values as special variables.
A stored procedure is a pre-compiled executable object that contains one or more SQL statements. In many cases stored procedures accept input parameters and return multiple values. Parameter values can be supplied if a stored procedure is written to accept them. A sample stored procedure with accepting input parameter is given below.
I know how to write a stored procedure with output parameters. But I don't know the reason why I would use it over just using a simple SELECT statement. A normal stored procedure can still return an output in a grid (see below examples).
Another way to obtain results from a stored procedure using output parameters. We talked about how to do this when talked earlier about stored procedure parameters. Output parameters allow the calling procedure, to pass a value into the procedure, allow it to be changed, and then the calling program or procedure to access the results.
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