문제가 발생했습니다: CREATE TABLE users_info (  
       `id` int NOT NULL AUTO_INCREMENT PRIMARY KEY ,
    `email`  VARCHAR(40 ) NOT NULL ,
    `password`  VARCHAR(20 )  NOT NULL,
    `nickname`  VARCHAR(10 )  NOT NULL,
 UNIQUE KEY `email_key` (`email` ) USING BTREE 
    )<br>Table 'users_info' already exists