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Next, let's learn about the custom syntax of the mysql function. I believe you will benefit a lot after reading it. The text is not much in essence. I hope the short article on the custom syntax of the mysql function is what you want.

DELIMITER / /

CREATE FUNCTION test (id int (10))

RETURNS CHAR (10)

BEGIN

# define variables

Declare ret char (10)

# assign values to variables

Set...

# Save the query statement to the variable

Select... INTO...

# process Control

If... Then

……

Else

……

End if

# return value

Return ret

END

/ /

DELIMITER

Delete:

Drop function test

Use:

Select test (555555, 888888)

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