记一次MySQL更新语句update的踩坑

create table user(
id int(12) comment '用户主键id',
name varchar(36) comment '用户名',
age int(12) comment '年龄');

insert into user values (1,'one',11),(2,'two',12),(3,'three',13),(4,'four',15),(5,'five',15);

+------+-------+------+
| id  | name | age |
+------+-------+------+
|  1 | one  |  11 |
|  2 | two  |  12 |
|  3 | three |  13 |
|  4 | four |  15 |
|  5 | five |  15 |
+------+-------+------+

update user set age=10 and name='user';

+------+-------+------+
| id  | name | age |
+------+-------+------+
|  1 | one  |  0 |
|  2 | two  |  0 |
|  3 | three |  0 |
|  4 | four |  0 |
|  5 | five |  0 |
+------+-------+------+

UPDATE table_name
SET column1=value1,column2=value2,...
WHERE some_column=some_value;
```sql

如果更新多个字段，相邻字段间应该以逗号分隔而不是`and`。如果 update 语句使用 and 作为多个字段之间的分隔符，就像最开始我提交给运维的那样，这个更新语句最终将会变成

```sql
update user set age=(10 and name='user');

update user set age=10, name='user';

UPDATE table_name
SET column1=value1,column2=value2,...
WHERE some_column=some_value;