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Why is the primary key matching setting in MySQL showing that I am wrong?

2022-04-21 07:53:00 【CSDN Q & A】

create table xs(
-> uid int,
-> upwd int,
-> uname varchar,
-> primary key(uid,upwd)
-> );
1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '

primary key(uid,upwd)

)' at line 7

Why? mysql It is set to match the primary key, which shows that I am wrong ？



Take the answer ：

VARCHAR The number of characters must be specified when using

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