Mysql与GoldenDB中如何利用sql脚本添加字段和数据表名的备注

Posted 2022-09-19 时光-ing

【MySQL】
Create TABLE ‘ACCOUNT’
‘id’ varchar(3) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NOT NULL COMMENT ‘用户ID’;
‘username’ varchar(10) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NOT DEFAULT NULL;
‘time’ datetime(0) NULL;
‘time2’ decimal(10,0) NULL DEFAULT NULL;
PRIMARY KEY(‘id’) USING BTREE
ENGINE = InnoDB CHARACTER SET = utf8mb4 COLLATE = utf8mb4_0900_ai_ci ROW_FORMAT = Dynamic;

注意：
方法一：直接在SQL的创建表语句中加入COMMENT ‘用户ID’；
方法二：创建完数据表后单独执行：comment on column account.id is ‘用户ID’;

【GoldenDB】
Create TABLE ‘ACCOUNT’
‘id’ varchar(3) CHARACTER SET utf8 COLLATE utf8_bin NOT NULL COMMENT ‘用户ID’;
‘username’ varchar(10) CHARACTER SET utf8 COLLATE utf8_bin NOT DEFAULT NULL;
‘time’ datetime(0) NULL;
‘time2’ decimal(10,0) NULL DEFAULT NULL;
PRIMARY KEY(‘id’) USING BTREE
ENGINE = InnoDB CHARACTER SET = utf8 COLLATE = utf8_bin COMMENT = ‘表名备注’ distributed by hash(主键，如id)(g1 g2)

注意：
这里只适用于方法一，而方法二不可。