mysql 建立、修改、刪除表

1.主鍵設置在中間，在末尾均可以，例如：mysql mysql> CREATE TABLE example4 ( stu_id integer, grade float, stu_name varchar(100), primary key(stu_id,stu_name), favourite text ); Query OK, 0 rows affected (0.02 sec) 2.var

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