การใช้ ORDER BY ใน View
ใช้ ORDER BY เรียงลำดับข้อมูลใน View
ตัวอย่าง: ตาราง Student_info
mysql> SELECT * FROM Student_info;
+------+---------+------------+------------+
| id | Name | Address | Subject |
+------+---------+------------+------------+
| 101 | YashPal | Amritsar | History |
| 105 | Gaurav | Chandigarh | Literature |
| 125 | Raman | Shimla | Computers |
| 130 | Ram | Jhansi | Computers |
| 132 | Shyam | Chandigarh | Economics |
| 133 | Mohan | Delhi | Computers |
+------+---------+------------+------------+ไวยากรณ์
CREATE OR REPLACE VIEW view_name AS
SELECT_statements FROM table ORDER BY expression [ASC|DESC]ตัวอย่าง 1: เรียง Name ASC (A-Z)
mysql> CREATE OR REPLACE VIEW Info AS
-> SELECT ID, Name, Address, Subject FROM Student_info ORDER BY Name ASC;
Query OK, 0 rows affected (0.11 sec)
mysql> SELECT * FROM Info;
+------+---------+------------+------------+
| ID | Name | Address | Subject |
+------+---------+------------+------------+
| 105 | Gaurav | Chandigarh | Literature |
| 133 | Mohan | Delhi | Computers |
| 130 | Ram | Jhansi | Computers |
| 125 | Raman | Shimla | Computers |
| 132 | Shyam | Chandigarh | Economics |
| 101 | YashPal | Amritsar | History |
+------+---------+------------+------------+ตัวอย่าง 2: เรียง Name DESC (Z-A)
mysql> CREATE OR REPLACE VIEW Info AS
-> SELECT ID, Name, Address, Subject FROM Student_info ORDER BY Name DESC;
Query OK, 0 rows affected (0.10 sec)
mysql> SELECT * FROM Info;
+------+---------+------------+------------+
| ID | Name | Address | Subject |
+------+---------+------------+------------+
| 101 | YashPal | Amritsar | History |
| 132 | Shyam | Chandigarh | Economics |
| 125 | Raman | Shimla | Computers |
| 130 | Ram | Jhansi | Computers |
| 133 | Mohan | Delhi | Computers |
| 105 | Gaurav | Chandigarh | Literature |
+------+---------+------------+------------+View จะจัดเก็บลำดับตาม ORDER BY ที่กำหนด
