Tạo view lọc dữ liệu theo điều kiện: dùng mệnh đề WHERE trong câu lệnh CREATE VIEW.
Cú pháp
Create View view_name AS Select_statements FROM table WHERE condition(s);
Ví dụ
Bảng 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 |
+------+---------+------------+------------+
4 rows in set (0.08 sec)
Tạo view Info chỉ lấy môn Computers:
mysql> Create OR Replace VIEW Info AS Select Id, Name, Address, Subject from student_info WHERE Subject = 'Computers';
Query OK, 0 rows affected (0.46 sec)
mysql> Select * from info;
+------+-------+---------+-----------+
| Id | Name | Address | Subject |
+------+-------+---------+-----------+
| 125 | Raman | Shimla | Computers |
| 130 | Ram | Jhansi | Computers |
+------+-------+---------+-----------+
2 rows in set (0.00 sec)