Golang操作mysql建表的问题

```go func createTable(db *sql.DB, table string) { sql := ` DROP TABLE IF EXISTS ` + table + `; CREATE TABLE ` + table + `( uid INT(10) NOT NULL AUTO_INCREMENT, username VARCHAR(64) NULL DEFAULT NULL, departname VARCHAR(64) NULL DEFAULT NULL, created DATE NULL DEFAULT NULL, PRIMARY KEY(uid) )ENGINE=InnoDB DEFAULT CHARSET=utf8;` fmt.Println("\n" + sql + "\n") smt, err := db.Prepare(sql) checkErr(err) smt.Exec() } ``` 这是我打印的调试信息: DROP TABLE IF EXISTS tablea; CREATE TABLE tablea( uid INT(10) NOT NULL AUTO_INCREMENT, username VARCHAR(64) NULL DEFAULT NULL, departname VARCHAR(64) NULL DEFAULT NULL, created DATE NULL DEFAULT NULL, PRIMARY KEY(uid) )ENGINE=InnoDB DEFAULT CHARSET=utf8; panic: 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 'CREATE TABLE tablea( uid INT(10) NOT NULL AUTO_INCREMENT, username VARCHAR(64)' at line 22 这是为什么捏?