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MySQL查询从表中查找替代记录

2024-05-09 18:10:04 338

要从表中查找替代记录，您需要使用OR条件，如以下语法所示：

select *from yourTableName where yourColumnName=yourValue1 OR yourColumnName=yourValue2…...N;

让我们首先创建一个表-

mysql> create table DemoTable772 (
   Id int NOT NULL AUTO_INCREMENT PRIMARY KEY,
   Name varchar(100),
   Age int
);

使用插入命令在表中插入一些记录-

mysql> insert into DemoTable772(Name,Age) values('Chris',21);
mysql> insert into DemoTable772(Name,Age) values('Robert',26);
mysql> insert into DemoTable772(Name,Age) values('Mike',27);
mysql> insert into DemoTable772(Name,Age) values('Sam',24);
mysql> insert into DemoTable772(Name,Age) values('Carol',28);
mysql> insert into DemoTable772(Name,Age) values('David',25);

使用select语句显示表中的所有记录-

mysql> select *from DemoTable772;

这将产生以下输出-

+----+--------+------+
| Id | Name   | Age  |
+----+--------+------+
|  1 | Chris  | 21   |
|  2 | Robert | 26   |
|  3 | Mike   | 27   |
|  4 | Sam    | 24   |
|  5 | Carol  | 28   |
|  6 | David  | 25   |
+----+--------+------+
6 rows in set (0.00 sec)

这是MySQL的查询OR-

mysql> select *from DemoTable772 where Id=2 OR Id=4 OR Id=6;

这将产生以下输出-

+----+--------+------+
| Id | Name   | Age  |
+----+--------+------+
|  2 | Robert | 26   |
|  4 | Sam    | 24   |
|  6 | David  | 25   |
+----+--------+------+
3 rows in set (0.01 sec)

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MySQL查询从表中查找替代记录

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