带有where子句的mysql insert命令

Question

我试图将数据插入数据库中的特定行，但我mysql说这是一个错误：

INSERT INTO user (rep, course) VALUES('5', 'computer science') WHERE user='2'

Answer 1

UPDATE user 
   SET rep = '5', course = 'computer science' 
 WHERE user = '2'

Link to docs .

Answer 2

您可能想要更新 ，

UPDATE user set rep='5', course='computer science' WHERE user='2'

Answer 3

INSERT语句不应该带有WHERE子句。

Answer 4

INSERT statement can not be used with WHERE clause because you are going to insert a new row using INSERT so how could you check any condition over the row which even doesn't exits ?

That's the main reason you can't use WHERE clause with INSERT statement....

use: UPDATE table-name SET column=val WHERE some cont

Command if you need to update existing row....