What does this SQL statement return?

What does returning do in SQL when would you use it?

The RETURNING clause allows you to retrieve values of columns (and expressions based on columns) that were modified by an insert, delete or update. Without RETURNING , you would have to run a SELECT statement after the DML statement is completed, in order to obtain the values of the changed columns.

What does this SQL statement do?

SQL is used to communicate with a database. According to ANSI (American National Standards Institute), it is the standard language for relational database management systems. SQL statements are used to perform tasks such as update data on a database, or retrieve data from a database.

What is difference between stored procedure and function?

The function must return a value but in Stored Procedure it is optional. Even a procedure can return zero or n values. Functions can have only input parameters for it whereas Procedures can have input or output parameters. Functions can be called from Procedure whereas Procedures cannot be called from a Function.

What does PSQL return?

The RETURNING keyword in PostgreSQL gives an opportunity to return from the insert or update statement the values of any columns after the insert or update was run.

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Does stored procedure return value?

A stored procedure does not have a return value but can optionally take input, output, or input-output parameters. A stored procedure can return output through any output or input-output parameter.

Is it mandatory to return value in stored procedure?

It is mandatory that when the RETURN statement is executed that it return an integer value. If the return value is not provided, the default is 0. The value is typically used to indicate success or failure of the procedure’s execution. … You can use one or more RETURN statements in a stored procedure.

Can we return in stored procedure?

You can use one or more RETURN statements in a stored procedure. The RETURN statement can be used anywhere after the declaration blocks within the SQL-procedure-body. To return multiple output values, parameters can be used instead.

Which software is used for SQL?

Comparison Of Top Open Source Database Software

free database software Platform Cloud Version
MySQL Windows, Linux, Mac. Yes
Oracle Windows, Linux Yes
SQL Server Windows, Linux. No
Firebird Windows, Linux, and Mac. No