You cannot return table from MySQL function. The function can return string, integer, char etc. To return table from MySQL, use stored procedure, not function.
How to return in MySQL?
The first RETURN statement is within the LOOP statement and when encountered will exit the LOOP, exit the function, and return the value stored in the variable called income. The second RETURN statement is used at the end of the function to exit the function and return the value stored in the starting_value variable.
What is DETERMINISTIC MySQL?
Mysql defines deterministic function as a function that. always produces the same result for the same input parameters.
How do I return a SQL statement?
The RETURN statement is used to unconditionally and immediately terminate an SQL procedure by returning the flow of control to the caller of the 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.
How do you return a value in SQL?
What is Return Value in SQL Server Stored Procedure?
- Right Click and select Execute Stored Procedure.
- If the procedure, expects parameters, provide the values and click OK.
- Along with the result that you expect, the stored procedure also returns a Return Value = 0.
What is difference between procedure and function in MySQL?
A procedure does not return a value. Instead, it is invoked with a CALL statement to perform an operation such as modifying a table or processing retrieved records. A function is invoked within an expression and returns a single value directly to the caller to be used in the expression.
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.
Does MySQL have stored procedures?
MySQL supports stored routines (procedures and functions). A stored routine is a set of SQL statements that can be stored in the server. … Banks, for example, use stored procedures and functions for all common operations.
How do you return a value from a stored procedure in mysql?
To return a value from stored procedure, you need to use user defined session specific variable. Add @ symbol before variable name. Now second call for difference of two values. Call the stored procedure.
How do you return a table from a stored procedure in SQL Server?
Every stored procedure can return an integer value known as the execution status value or return code. If you still want a table returned from the SP, you’ll either have to work the record set returned from a SELECT within the SP or tie into an OUTPUT variable that passes an XML datatype.
Do functions return values?
A return is a value that a function returns to the calling script or function when it completes its task. A return value can be any one of the four variable types: handle, integer, object, or string. The type of value your function returns depends largely on the task it performs.
What does returning do in SQL?
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.
Which procedures have return value?
Stored functions have a return value and can also take a list of input, output, and input-output parameters.
What is the difference between procedure and function?
Function is used to calculate something from a given input. Hence it got its name from Mathematics. While procedure is the set of commands, which are executed in a order.