sql server如何给表和字段添加备注并更新备注以及查询备注呢？

表添加和修改备注：\x0d\x0a新增：exec sp_addextendedproperty N'MS_Description', N'表备注内容', N'SCHEMA', N'dbo',N'table', N'表名'\x0d\x0a修改：exec sp_updateextendedproperty N'MS_Description', N'表备注内容', N'SCHEMA', N'dbo',N'table', N'表名'\x0d\x0a字段添加和修改备注：\x0d\x0a新增：exec sp_addextendedproperty N'MS_Description', N'字段备注内容', N'SCHEMA', N'dbo',N'table', N'表名',N'column', N'字段名'\x0d\x0a修改：exec sp_updateextendedproperty N'MS_Description', N'字段备注内容', N'SCHEMA', N'dbo',N'table', N'表名',N'column', N'字段名'

Oracle 下读取表/字段的备注信息

Oracle 通过COMMENT ON TABLE / COMMENT ON COLUMN 追加表/字段的备注。

CREATE TABLE "MR_DEPT" (

"DEPT_ID" NUMBER NOT NULL ,

"PARENT_ID" NUMBER,

"DEPT_NAME" CHAR(20) NOT NULL ,

"STATUS" NUMBER DEFAULT 1 NOT NULL ,

PRIMARY KEY ("DEPT_ID")

)

COMMENT ON TABLE "MR_DEPT" IS '部门表'

COMMENT ON COLUMN "MR_DEPT"."DEPT_ID" IS '部门编号'

COMMENT ON COLUMN "MR_DEPT"."PARENT_ID" IS '上级部门编号'

COMMENT ON COLUMN "MR_DEPT"."DEPT_NAME" IS '部门名'

COMMENT ON COLUMN "MR_DEPT"."STATUS" IS '状态'

备注加好以后，如何在查询中检索呢？

查询表的备注信息

SELECT

TABLE_NAME,

TABLE_TYPE,

COMMENTS

FROM

USER_TAB_COMMENTS

WHERE

TABLE_NAME = 'MR_DEPT

查询字段的备注信息

SELECT

TABLE_NAME,

COLUMN_NAME,

COMMENTS

FROM

USER_COL_COMMENTS

WHERE

TABLE_NAME = 'MR_DEPT

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