Output data in a cursor
2024-09-26 06:58:19
http://www.java2s.com/Code/SQL/Cursor/Outputdatainacursor.htm
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 (0.05 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 (0.02 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 $$
mysql> CREATE PROCEDURE myProc()
-> READS SQL DATA
-> BEGIN
-> DECLARE l_last_row INT DEFAULT 0;
-> DECLARE l_dept_id INT;
-> DECLARE c_dept CURSOR FOR
-> SELECT id
-> FROM employee;
-> /* handler to set l_last_row=1 if a cursor returns no more rows */
-> DECLARE continue handler for NOT FOUND SET l_last_row=1;
->
-> OPEN c_dept;
-> dept_cursor: LOOP
-> FETCH c_dept INTO l_dept_id;
-> IF (l_last_row=1) THEN
-> LEAVE dept_cursor;
-> END IF;
-> select l_dept_id;
->
-> END LOOP dept_cursor;
-> CLOSE c_dept;
->
-> END$$
Query OK, 0 rows affected (0.01 sec) mysql>
mysql> delimiter ;
mysql> call myProc();
+-----------+
| l_dept_id |
+-----------+
| 1 |
+-----------+
1 row in set (0.00 sec) +-----------+
| l_dept_id |
+-----------+
| 2 |
+-----------+
1 row in set (0.16 sec) +-----------+
| l_dept_id |
+-----------+
| 3 |
+-----------+
1 row in set (0.16 sec) +-----------+
| l_dept_id |
+-----------+
| 4 |
+-----------+
1 row in set (0.16 sec) +-----------+
| l_dept_id |
+-----------+
| 5 |
+-----------+
1 row in set (0.17 sec) +-----------+
| l_dept_id |
+-----------+
| 6 |
+-----------+
1 row in set (0.17 sec) +-----------+
| l_dept_id |
+-----------+
| 7 |
+-----------+
1 row in set (0.17 sec) +-----------+
| l_dept_id |
+-----------+
| 8 |
+-----------+
1 row in set (0.17 sec) Query OK, 0 rows affected (0.17 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) mysql>
mysql>
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