mysql怎么修改表的单个数据

mysql修改表中单个数据的示例：

语法：

update表名set字段名=‘新内容’+where条件

示例代码：

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|
+-----------+--------------+---------------+-----------------+
3rowsinset(0.04sec)
mysql>update`runoob_tbl`set`submission_date`='2016-05-06'where`runoob_id`=3;
QueryOK,1rowaffected(0.16sec)
Rowsmatched:1Changed:1Warnings: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|
+-----------+--------------+---------------+-----------------+
3rowsinset(0.04sec)