将新的枚举列添加到现有表中

Question

I'm trying to add a gender column to my table with this query:

ALTER TABLE QRCodeUser ADD gender CHAR(1) enum('M','F') NOT NULL;

I get this error:

#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 'enum('M','F') NOT NULL' at line 1

What's my mistake?

Answer 1

试试这个（你不需要指定大小， char(1) ）：

ALTER TABLE QRCodeUser ADD gender  enum('M','F') NOT NULL;

Answer 2

正确使用语法：

ALTER TABLE table_name ADD column_name  enum(`field1`,`field2`,...);