如何使用MySQL查询找到特定的行？
让我们首先创建一个表-
mysql> create table DemoTable ( UserId int, UserName varchar(100) );
使用插入命令在表中插入一些记录-
mysql> insert into DemoTable values(100,'Chris'); mysql> insert into DemoTable values(101,'Bob'); mysql> insert into DemoTable values(102,'David'); mysql> insert into DemoTable values(103,'Mike'); mysql> insert into DemoTable values(104,'Sam');
使用select语句显示表中的所有记录-
mysql> select *from DemoTable;
这将产生以下输出-
+--------+----------+ | UserId | UserName | +--------+----------+ | 100 | Chris | | 101 | Bob | | 102 | David | | 103 | Mike | | 104 | Sam | +--------+----------+ 5 rows in set (0.00 sec)
以下是查找特定行并显示该行记录的查询-
mysql> select *from DemoTable where UserId=102 and UserName='David';
这将产生以下输出-
+--------+----------+ | UserId | UserName | +--------+----------+ | 102 | David | +--------+----------+ 1 row in set (0.00 sec)