create function in mysql

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showing results for - "create function in mysql"

1create [or replace] function function_name(param_list)
2   returns return_type 
3   language plpgsql
4as $$
5declare 
6-- variable declaration
7begin
8 -- logic
9end;
10$$

1-- MySQL
2
3-- example
4DELIMITER $$
5CREATE FUNCTION f_employee_count(p_dept_no INTEGER) RETURNS INTEGER
6  DETERMINISTIC NO SQL READS SQL DATA
7  BEGIN
8    DECLARE v_emp_count INTEGER;
9
10    SELECT COUNT(*)
11    INTO v_emp_count
12    FROM EMPLOYEES E
13    WHERE E.DEPT_NO = p_dept_no
14    GROUP BY DEPARTMENT_NO;
15
16    RETURN v_emp_count;
17END$$
18DELIMITER ;
19
20/* syntax:
21DELIMITER $$
22CREATE FUNCTION <Your-procedure-name>(<arguments>) RETURNS <date-type>
23  DETERMINISTIC NO SQL READS SQL DATA
24  BEGIN
25      DECLARE <variable-name> <data-type>
26
27      <Code-that-sets-the-output-variable>; 
28
29      RETURN <variable-name>;
30END$$
31DELIMITER ;
32*/

1// created function checkTags
2CREATE FUNCTION `data-management`.checkTags(tags text)
3RETURNS text
4DETERMINISTIC
5BEGIN
6return tags ;
7END
8
9
10// queries  according to it
11SELECT * FROM `data-management`.properties p WHERE `data-management`.checkTags(p.tags = 'tag1,absntee')

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