更新单行MySQL的多列？
让我们首先创建一个表-
mysql> create table DemoTable -> ( -> FirstName varchar(100), -> Age int, -> Score int -> );
使用插入命令在表中插入一些记录-
mysql> insert into DemoTable values('Robert',21,78);
mysql> insert into DemoTable values('Bob',20,90);
mysql> insert into DemoTable values('Sam',22,69);使用select语句显示表中的所有记录-
mysql> select *from DemoTable;
输出结果
+-----------+------+-------+ | FirstName | Age | Score | +-----------+------+-------+ | Robert | 21 | 78 | | Bob | 20 | 90 | | Sam | 22 | 69 | +-----------+------+-------+ 3 rows in set (0.00 sec)
以下是仅更新名字为“Bob”的行的“年龄”和“分数”列的查询-
mysql> update DemoTable -> set Age=25, -> Score=Score+9 -> where FirstName='Bob'; Rows matched: 1 Changed: 1 Warnings: 0
让我们再次检查表记录-
mysql> select *from DemoTable;
输出结果
+-----------+------+-------+ | FirstName | Age | Score | +-----------+------+-------+ | Robert | 21 | 78 | | Bob | 25 | 99 | | Sam | 22 | 69 | +-----------+------+-------+ 3 rows in set (0.00 sec)