MySQL/Oracle 添加/查看錶註釋和字段註釋

1、Oracle 添加/查看錶註釋和字段註釋

（1）添加表註釋和字段註釋

-- ----------------------------
-- Table structure for GW_CONCURRENT
-- ----------------------------
CREATE TABLE "GW_CONCURRENT"
(
    "ID"             NUMBER(19)         NOT NULL,
    "API_GROUP_ID"   NUMBER(19)         NOT NULL,
    "API_ID"         NUMBER(19)         NOT NULL,
    "CLUSTER_ID"     NUMBER(19)         NOT NULL,
    "CREATE_TIME"    TIMESTAMP(6)       NULL,
    "MODIFY_TIME"    TIMESTAMP(6)       NULL,
    "QUEUE"          NUMBER(10)         NULL,
    "REMARKS"        VARCHAR2(255 CHAR) NULL,
    "STATUS"         VARCHAR2(255 CHAR) NOT NULL
)
    LOGGING
    NOCOMPRESS
    NOCACHE
;
COMMENT ON TABLE "GW_CONCURRENT" IS '併發控制表';
COMMENT ON COLUMN "GW_CONCURRENT"."ID" IS 'id';
COMMENT ON COLUMN "GW_CONCURRENT"."CLUSTER_ID" IS '集羣id';
COMMENT ON COLUMN "GW_CONCURRENT"."REMARKS" IS '簡介';
COMMENT ON COLUMN "GW_CONCURRENT"."CREATE_TIME" IS '建立時間';
COMMENT ON COLUMN "GW_CONCURRENT"."MODIFY_TIME" IS '更新時間';
COMMENT ON COLUMN "GW_CONCURRENT"."STATUS" IS '狀態';
COMMENT ON COLUMN "GW_CONCURRENT"."API_ID" IS 'apiID';
COMMENT ON COLUMN "GW_CONCURRENT"."API_GROUP_ID" IS 'api分組ID';

（2）查看錶註釋和字段註釋

獲取表註釋。得到 table_name,table_type,comments。

select * from user_tab_comments; 

獲取字段註釋。得到 table_name,column_name,comments。

select * from user_col_comments; 

 

2、MySQL 添加/查看錶註釋和字段註釋

（1）添加表註釋和字段註釋

-- ----------------------------
-- Table structure for `gw_concurrent`
-- ----------------------------
CREATE TABLE `gw_concurrent`
(
    `id`             int(11)    NOT NULL AUTO_INCREMENT COMMENT '自增ID',
    `cluster_id`     int(11)    NOT NULL COMMENT '集羣ID',
    `api_group_id`   int(11)    NOT NULL COMMENT 'api分組ID',
    `api_id`         int(11)    NOT NULL COMMENT 'apiID',
    `max_concurrent` int(11)    NOT NULL COMMENT '最大併發',
    `queue`          int(11)    NOT NULL COMMENT '隊列大小',
    `status`         varchar(5) NOT NULL COMMENT '狀態',
    `remarks`        varchar(255)    DEFAULT NULL COMMENT '簡介',
    `create_time`    timestamp  NULL DEFAULT CURRENT_TIMESTAMP COMMENT '建立時間',
    `modify_time`    timestamp  NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP COMMENT '更新時間',
    PRIMARY KEY (`id`)
) ENGINE = InnoDB
  DEFAULT CHARSET = utf8 COMMENT ='併發控制表';

（2）查看錶註釋和字段註釋

-- 表註釋
  select * from information_schema.TABLES where TABLE_SCHEMA='數據庫名' and TABLE_NAME='表名' 
  -- 字段註釋
  show  full  columns  from  test1; 
   --在元數據的表裏面看 
  select * from information_schema.COLUMNS where TABLE_SCHEMA='數據庫名' and TABLE_NAME='表名' ;