创建MySQL视图时,如何结合使用逻辑运算符?
MySQL视图可以通过使用逻辑运算符(例如AND,OR和NOT)的组合来创建。可以通过以下示例进行说明-
示例
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'); mysql> Select * from Info; +------+-------+---------+-----------+ | ID | Name | Address | Subject | +------+-------+---------+-----------+ | 133 | Mohan | Delhi | Computers | +------+-------+---------+-----------+ 1 row in set (0.00 sec)
热门推荐
10 给老人的祝福语简短
11 死人新年祝福语简短句
12 给导师送花祝福语简短
13 给医生简短新年祝福语
14 公司年终晚会祝福语简短
15 给男生的简短祝福语
16 网友婚姻祝福语大全简短
17 老婆生日祝福语简短孩子
18 亲姐姐怀孕祝福语简短