MySQL UPDATE 更新

以下是 UPDATE 命令修改 MySQL 数据表数据的通用 SQL 语法：

UPDATE table_name SET field1=new-value1, field2=new-value2
[WHERE Clause]

以下实例将更新数据表中 runoob_id 为 3 的 runoob_title 字段值：

mysql> UPDATE runoob_tbl SET runoob_title='学习 C++' WHERE runoob_id=;
Query OK,  rows affected (0.01 sec)

mysql> SELECT * from runoob_tbl WHERE runoob_id=;
+-----------+--------------+---------------+-----------------+
| runoob_id | runoob_title | runoob_author | submission_date |
+-----------+--------------+---------------+-----------------+
|          | 学习 C++   | RUNOOB.COM    | --      |
+-----------+--------------+---------------+-----------------+
 rows in set (0.01 sec)

update users set avatar='files/01/ChMkJlah6X2IFUmnAAvz2hvALAwAAHjswFkjPoAC_Py963.jpg' WHERE uid=;

参考：

https://www.runoob.com/mysql/mysql-update-query.html