-Definition
A stored procedure is a piece of code (procedure) composed of SQL stored in the database.
A stored procedure is usually used to complete a piece of business logic, such as registration, payment of shifts, order storage, etc.
A function usually focuses on a certain function and is regarded as the service of other programs. It needs to call the function in other statements, and the stored procedure cannot be called by others. It is executed by itself through call.
-Create
CREATE PROCEDURE sp_name (parameter list)
过程体
Parameter list: different from the parameter list of the function, the parameter type needs to be specified
IN, said input type
OUT, said output type
INOUT, said hybrid
Note that there is no return value.
/* Stored procedure */
A stored procedure is a collection of executable code. Compared with functions, it is more inclined to business logic.
Call: CALL procedure name
-Attention
-
There is no return value.
-
Can only be called alone, not mixed in other statements
-Parameters
IN|OUT|INOUT parameter name data type
IN input: input data to the parameters inside the process body during the call
OUT output: in the call process, the result of the process body is returned to the client
INOUT input and output: both input and output
– Syntax
CREATE PROCEDURE procedure name (parameter list)
BEGIN
过程体
END
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