MySQL Tutorial/Procedure Function/Create Table
Create a table in a procedure
<source lang="sql">
mysql> delimiter $$ mysql> mysql> mysql> CREATE PROCEDURE myProc()
-> BEGIN -> DECLARE i INT DEFAULT 1; -> -> SET autocommit=0; -> -> DROP TABLE IF EXISTS test_table ; -> CREATE TABLE test_table ( -> id INT PRIMARY KEY, -> some_data VARCHAR(30)) -> ENGINE=innodb; -> -> END$$
Query OK, 0 rows affected (0.00 sec) mysql> mysql> delimiter ; mysql> call myProc(); Query OK, 0 rows affected, 1 warning (0.08 sec) mysql> drop procedure myProc; Query OK, 0 rows affected (0.00 sec) mysql> desc test_table; +-----------+-------------+------+-----+---------+-------+ | Field | Type | Null | Key | Default | Extra | +-----------+-------------+------+-----+---------+-------+ | id | int(11) | NO | PRI | | | | some_data | varchar(30) | YES | | NULL | | +-----------+-------------+------+-----+---------+-------+ 2 rows in set (0.00 sec) mysql> drop table test_table; Query OK, 0 rows affected (0.03 sec) mysql></source>
Create a TEMPORARY table and save data into it in a procedure
<source lang="sql">
mysql> mysql> CREATE TABLE Employee(
-> id int, -> first_name VARCHAR(15), -> last_name VARCHAR(15), -> start_date DATE, -> end_date DATE, -> salary FLOAT(8,2), -> city VARCHAR(10), -> description VARCHAR(15) -> );
Query OK, 0 rows affected (0.01 sec) mysql> mysql> mysql> insert into Employee(id,first_name, last_name, start_date, end_Date, salary, City, Description)
-> values (1,"Jason", "Martin", "19960725", "20060725", 1234.56, "Toronto", "Programmer");
Query OK, 1 row affected (0.00 sec) mysql> mysql> insert into Employee(id,first_name, last_name, start_date, end_Date, salary, City, Description)
-> values(2,"Alison", "Mathews", "19760321", "19860221", 6661.78, "Vancouver","Tester");
Query OK, 1 row affected (0.00 sec) mysql> mysql> insert into Employee(id,first_name, last_name, start_date, end_Date, salary, City, Description)
-> values(3,"James", "Smith", "19781212", "19900315", 6544.78, "Vancouver","Tester");
Query OK, 1 row affected (0.00 sec) mysql> mysql> insert into Employee(id,first_name, last_name, start_date, end_Date, salary, City, Description)
-> values(4,"Celia", "Rice", "19821024", "19990421", 2344.78, "Vancouver","Manager");
Query OK, 1 row affected (0.00 sec) mysql> mysql> insert into Employee(id,first_name, last_name, start_date, end_Date, salary, City, Description)
-> values(5,"Robert", "Black", "19840115", "19980808", 2334.78, "Vancouver","Tester");
Query OK, 1 row affected (0.00 sec) mysql> mysql> insert into Employee(id,first_name, last_name, start_date, end_Date, salary, City, Description)
-> values(6,"Linda", "Green", "19870730", "19960104", 4322.78,"New York", "Tester");
Query OK, 1 row affected (0.00 sec) mysql> mysql> insert into Employee(id,first_name, last_name, start_date, end_Date, salary, City, Description)
-> values(7,"David", "Larry", "19901231", "19980212", 7897.78,"New York", "Manager");
Query OK, 1 row affected (0.00 sec) mysql> mysql> insert into Employee(id,first_name, last_name, start_date, end_Date, salary, City, Description)
-> values(8,"James", "Cat", "19960917", "20020415", 1232.78,"Vancouver", "Tester");
Query OK, 1 row affected (0.00 sec) mysql> mysql> select * from Employee; +------+------------+-----------+------------+------------+---------+-----------+-------------+ | id | first_name | last_name | start_date | end_date | salary | city | description | +------+------------+-----------+------------+------------+---------+-----------+-------------+ | 1 | Jason | Martin | 1996-07-25 | 2006-07-25 | 1234.56 | Toronto | Programmer | | 2 | Alison | Mathews | 1976-03-21 | 1986-02-21 | 6661.78 | Vancouver | Tester | | 3 | James | Smith | 1978-12-12 | 1990-03-15 | 6544.78 | Vancouver | Tester | | 4 | Celia | Rice | 1982-10-24 | 1999-04-21 | 2344.78 | Vancouver | Manager | | 5 | Robert | Black | 1984-01-15 | 1998-08-08 | 2334.78 | Vancouver | Tester | | 6 | Linda | Green | 1987-07-30 | 1996-01-04 | 4322.78 | New York | Tester | | 7 | David | Larry | 1990-12-31 | 1998-02-12 | 7897.78 | New York | Manager | | 8 | James | Cat | 1996-09-17 | 2002-04-15 | 1232.78 | Vancouver | Tester | +------+------------+-----------+------------+------------+---------+-----------+-------------+ 8 rows in set (0.00 sec) mysql> mysql> mysql> mysql> DELIMITER $$ mysql> mysql> CREATE PROCEDURE myProc(in_id INT)
-> MODIFIES SQL DATA -> BEGIN -> DECLARE l_employee_id INT; -> DECLARE l_salary NUMERIC(8,2); -> DECLARE l_new_salary NUMERIC(8,2); -> DECLARE done INT DEFAULT 0; -> -> DECLARE cur1 CURSOR FOR -> SELECT id, salary -> FROM employee -> WHERE id=in_id; -> -> DECLARE CONTINUE HANDLER FOR NOT FOUND SET done=1; -> -> CREATE TEMPORARY TABLE IF NOT EXISTS emp_raises -> (employee_id INT, new_salary NUMERIC(8,2)); -> -> OPEN cur1; -> emp_loop: LOOP -> -> FETCH cur1 INTO l_employee_id, l_salary; -> -> IF done=1 THEN /* No more rows*/ -> LEAVE emp_loop; -> END IF; -> -> set l_new_salary = 1233.12; -> -> UPDATE employee -> SET salary=l_new_salary -> WHERE id=l_employee_id; -> /* Keep track of changed salaries*/ -> INSERT INTO emp_raises (employee_id,new_salary) -> VALUES (l_employee_id,l_new_salary); -> -> -> END LOOP emp_loop; -> CLOSE cur1; -> /* Print out the changed salaries*/ -> -> SELECT id,salary from employee; -> -> SELECT employee_id,new_salary from emp_raises -> ORDER BY employee_id; -> END $$
Query OK, 0 rows affected (0.00 sec) mysql> mysql> DELIMITER ; mysql> call myProc(1); +------+---------+ | id | salary | +------+---------+ | 1 | 1233.12 | | 2 | 6661.78 | | 3 | 6544.78 | | 4 | 2344.78 | | 5 | 2334.78 | | 6 | 4322.78 | | 7 | 7897.78 | | 8 | 1232.78 | +------+---------+ 8 rows in set (0.01 sec) +-------------+------------+ | employee_id | new_salary | +-------------+------------+ | 1 | 1233.12 | +-------------+------------+ 1 row in set (0.01 sec) Query OK, 0 rows affected, 1 warning (0.01 sec) mysql> drop procedure myProc; Query OK, 0 rows affected (0.00 sec) mysql> mysql> mysql> mysql> mysql> mysql> drop table Employee; Query OK, 0 rows affected (0.00 sec)</source>
CREATE TEMPORARY TABLE in a procedure
<source lang="sql">
mysql> mysql> mysql> CREATE TABLE Employee(
-> id int, -> first_name VARCHAR(15), -> last_name VARCHAR(15), -> start_date DATE, -> end_date DATE, -> salary FLOAT(8,2), -> city VARCHAR(10), -> description VARCHAR(15) -> );
Query OK, 0 rows affected (0.03 sec) mysql> mysql> mysql> insert into Employee(id,first_name, last_name, start_date, end_Date, salary, City, Description)
-> values (1,"Jason", "Martin", "19960725", "20060725", 1234.56, "Toronto", "Programmer");
Query OK, 1 row affected (0.00 sec) mysql> mysql> insert into Employee(id,first_name, last_name, start_date, end_Date, salary, City, Description)
-> values(2,"Alison", "Mathews", "19760321", "19860221", 6661.78, "Vancouver","Tester");
Query OK, 1 row affected (0.00 sec) mysql> mysql> insert into Employee(id,first_name, last_name, start_date, end_Date, salary, City, Description)
-> values(3,"James", "Smith", "19781212", "19900315", 6544.78, "Vancouver","Tester");
Query OK, 1 row affected (0.00 sec) mysql> mysql> insert into Employee(id,first_name, last_name, start_date, end_Date, salary, City, Description)
-> values(4,"Celia", "Rice", "19821024", "19990421", 2344.78, "Vancouver","Manager");
Query OK, 1 row affected (0.00 sec) mysql> mysql> insert into Employee(id,first_name, last_name, start_date, end_Date, salary, City, Description)
-> values(5,"Robert", "Black", "19840115", "19980808", 2334.78, "Vancouver","Tester");
Query OK, 1 row affected (0.01 sec) mysql> mysql> insert into Employee(id,first_name, last_name, start_date, end_Date, salary, City, Description)
-> values(6,"Linda", "Green", "19870730", "19960104", 4322.78,"New York", "Tester");
Query OK, 1 row affected (0.00 sec) mysql> mysql> insert into Employee(id,first_name, last_name, start_date, end_Date, salary, City, Description)
-> values(7,"David", "Larry", "19901231", "19980212", 7897.78,"New York", "Manager");
Query OK, 1 row affected (0.00 sec) mysql> mysql> insert into Employee(id,first_name, last_name, start_date, end_Date, salary, City, Description)
-> values(8,"James", "Cat", "19960917", "20020415", 1232.78,"Vancouver", "Tester");
Query OK, 1 row affected (0.00 sec) mysql> mysql> select * from Employee; +------+------------+-----------+------------+------------+---------+-----------+-------------+ | id | first_name | last_name | start_date | end_date | salary | city | description | +------+------------+-----------+------------+------------+---------+-----------+-------------+ | 1 | Jason | Martin | 1996-07-25 | 2006-07-25 | 1234.56 | Toronto | Programmer | | 2 | Alison | Mathews | 1976-03-21 | 1986-02-21 | 6661.78 | Vancouver | Tester | | 3 | James | Smith | 1978-12-12 | 1990-03-15 | 6544.78 | Vancouver | Tester | | 4 | Celia | Rice | 1982-10-24 | 1999-04-21 | 2344.78 | Vancouver | Manager | | 5 | Robert | Black | 1984-01-15 | 1998-08-08 | 2334.78 | Vancouver | Tester | | 6 | Linda | Green | 1987-07-30 | 1996-01-04 | 4322.78 | New York | Tester | | 7 | David | Larry | 1990-12-31 | 1998-02-12 | 7897.78 | New York | Manager | | 8 | James | Cat | 1996-09-17 | 2002-04-15 | 1232.78 | Vancouver | Tester | +------+------------+-----------+------------+------------+---------+-----------+-------------+ 8 rows in set (0.00 sec) mysql> mysql> mysql> mysql> delimiter $$ mysql> mysql> CREATE PROCEDURE myProc()
-> -> BEGIN -> DROP TEMPORARY TABLE IF EXISTS employeeTemp; -> CREATE TEMPORARY TABLE employeeTemp AS -> SELECT id,start_date -> FROM employee; -> END$$
Query OK, 0 rows affected (0.00 sec) mysql> mysql> delimiter ; mysql> call myProc(); Query OK, 0 rows affected, 1 warning (0.00 sec) mysql> select * from employeeTemp; +------+------------+ | id | start_date | +------+------------+ | 1 | 1996-07-25 | | 2 | 1976-03-21 | | 3 | 1978-12-12 | | 4 | 1982-10-24 | | 5 | 1984-01-15 | | 6 | 1987-07-30 | | 7 | 1990-12-31 | | 8 | 1996-09-17 | +------+------------+ 8 rows in set (0.00 sec) mysql> drop TEMPORARY TABLE employeeTemp; Query OK, 0 rows affected (0.00 sec) mysql> drop procedure myProc; Query OK, 0 rows affected (0.00 sec) mysql> mysql> mysql> mysql> mysql> drop table Employee; Query OK, 0 rows affected (0.00 sec) mysql> mysql></source>