MySQL 向特定行和列插入值
mysqlmysqli database更新于 2024/8/9 13:32:17
首先我们创建一个表 −
mysql> create table DemoTable1569 -> ( -> StudentId varchar(10), -> StudentName varchar(20) -> ); Query OK, 0 rows affected (3.05 sec)
使用 insert 命令在表中插入一些记录 −
mysql> insert into DemoTable1569 values('John_12','John Smith');
Query OK, 1 row affected (0.38 sec)
mysql> insert into DemoTable1569 values('David_321','Carol Taylor');
Query OK, 1 row affected (0.50 sec)
mysql> insert into DemoTable1569 values('David_989','David Miller');
Query OK, 1 row affected (0.24 sec)
使用 select 语句显示表中的所有记录 −
mysql> select * from DemoTable1569;
这将产生以下输出 −
+-----------+--------------+ | StudentId | StudentName | +-----------+--------------+ | John_12 | John Smith | | David_321 | Carol Taylor | | David_989 | David Miller | +-----------+--------------+ 3 rows in set (0.00 sec)
这是向特定行和列插入值的查询。
mysql> update DemoTable1569 set StudentId='Carol_321' where StudentName='Carol Taylor'; Query OK, 1 row affected (0.26 sec) Rows matched: 1 Changed: 1 Warnings: 0
让我们再次检查表记录。
mysql> select * from DemoTable1569;
这将产生以下输出 −
+-----------+--------------+ | StudentId | StudentName | +-----------+--------------+ | John_12 | John Smith | | Carol_321 | Carol Taylor | | David_989 | David Miller | +-----------+--------------+ 3 rows in set (0.00 sec)
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mysql 参考教程 - 该教程包含有关 mysql 的更多信息:https://www.cainiaomax.com/mysql/
