MySQL Tutorial/Procedure Function/Create Table — различия между версиями
Admin (обсуждение | вклад) м (1 версия) |
|
(нет различий)
| |
Версия 13:44, 26 мая 2010
Create a table in a procedure
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>
Create a TEMPORARY table and save data into it in a procedure
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)
CREATE TEMPORARY TABLE in a procedure
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>