改正以下sql语句 报错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 0 NULL DEFAULT CURRENT_TIMESTAMP0 Gupdate_time timest

DROP TABLE IF EXISTS goods; CREATE TABLE goods ( Gid int(0) NOT NULL AUTO_INCREMENT, Sid int(0) NULL DEFAULT NULL, Gname varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NULL DEFAULT NULL, Gbuyprice varchar(10) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NULL DEFAULT NULL, Gsellprice varchar(10) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NULL DEFAULT NULL, Gphoto varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NULL DEFAULT NULL, Gdescribe varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NULL DEFAULT NULL, Gaudit enum('0','1') CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NULL DEFAULT '0', Gstatus enum('0','1','2','3') CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NULL DEFAULT '0', Gtime timestamp(0) NULL DEFAULT CURRENT_TIMESTAMP, Gupdate_time timestamp(0) NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP, SELLusername varchar(40) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NOT NULL, PRIMARY KEY (Gid) USING BTREE, INDEX Sid(Sid) USING BTREE, CONSTRAINT Sid FOREIGN KEY (Sid) REFERENCES student (Sid) ON DELETE RESTRICT ON UPDATE RESTRICT ) ENGINE = InnoDB AUTO_INCREMENT = 40 CHARACTER SET = utf8mb4 COLLATE = utf8mb4_general_ci ROW_FORMAT = Dynamic