在建立 MySQL 視圖時如何使用邏輯運算子組合？

MySQL 視圖可以透過使用 AND、OR 和 NOT 等邏輯運算子的組合來建立。可以藉助以下範例進行說明 -

範例

mysql> Create or Replace View Info AS select ID, Name, Address , Subject FROM Student_info WHERE (Subject = 'Computers' AND ADDRESS = 'Delhi') OR (Subject = 'History' AND Address = 'Amritsar');
Query OK, 0 rows affected (0.11 sec)

mysql> Select * from Info;
+------+-------+---------+-----------+
| ID   | Name  | Address | Subject   |
+------+-------+---------+-----------+
| 133  | Mohan | Delhi   | Computers |
+------+-------+---------+-----------+
1 row in set (0.00 sec)

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