In SQL, the update statement is used to update data. There are many ways to update multiple field statements at once in SQL. Here are two ways to introduce them to you. I hope Helpful to everyone.
Method 1:
UPDATE 表名 SET 字段1=值,字段2=值2,... [WHERE 条件]
Multiple fields can be separated by commas. Each "field name = value" is to assign a value to the field, followed by the WHERE condition The statement can be used or not.
Note: The condition after set must use comma and not and. Multiple conditions after set are not related or related, so and cannot be used; where condition It can be followed by and.
Example:
update table set sex= '男', name='张三' where id = 1 ; //正确 update table set sex= '男' and name='张三' where id = 1 ; //错误
Method 2:
update 表名 set(字段1,字段2,字段3) = (select 数值1,数值2,数值3 from 表名 where....) where 条件
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