以下sql语句报错：Unknown collation uutf8mb4_general_ci 怎么修改DROP TABLE IF EXISTS goods;CREATE TABLE goods Gid int0 NOT NULL AUTO_INCREMENT Sid int0 NULL DEFAULT NULL Gname varchar255 CHARACTER SET utf8m

请将 uutf8mb4_general_ci 修改为 utf8mb4_general_ci。修改后的语句如下：

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(0), Gupdate_time timestamp(0) NULL DEFAULT NULL ON UPDATE CURRENT_TIMESTAMP(0), 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