mysql修改表中某个数据

• update 表名 set 字段名=‘新内容’ + where条件

mysql> select*from `runoob_tbl`;
+-----------+--------------+---------------+-----------------+
| runoob_id | runoob_title | runoob_author | submission_date |
+-----------+--------------+---------------+-----------------+
|         1 | 学习 PHP     | 菜鸟教程      | 2018-08-15      |
|         2 | 学习 MySQL   | 菜鸟教程      | 2018-08-15      |
|         3 | JAVA 教程    | RUNOOB.COM    | 2018-08-15      |
+-----------+--------------+---------------+-----------------+
3 rows in set (0.04 sec)

mysql> update `runoob_tbl` set `submission_date`='2016-05-06' where `runoob_id`=3;
Query OK, 1 row affected (0.16 sec)
Rows matched: 1  Changed: 1  Warnings: 0

mysql> select*from `runoob_tbl`;
+-----------+--------------+---------------+-----------------+
| runoob_id | runoob_title | runoob_author | submission_date |
+-----------+--------------+---------------+-----------------+
|         1 | 学习 PHP     | 菜鸟教程      | 2018-08-15      |
|         2 | 学习 MySQL   | 菜鸟教程      | 2018-08-15      |
|         3 | JAVA 教程    | RUNOOB.COM    | 2016-05-06      |
+-----------+--------------+---------------+-----------------+
3 rows in set (0.04 sec)