1、查詢資料庫中所有的資料庫表

select * from sysobjects where xtype = 'u' and name != 'sysdiagrams'

2、查詢資料庫表中的說明欄位

SELECT A.name AS table_name,B.name AS column_name,C.value AS column_description 

FROM sys.tables A INNER JOIN sys.columns B 

ON B.object_id = A.object_id LEFT JOIN sys.extended_properties C 

ON
 
 C.major_id = B.object_id AND C.minor_id = B.column_id 

WHERE A.name ='填需要查詢的表的表名'

--快速查看錶結構（比較全面的）
DECLARE @tableName NVARCHAR(MAX )
SET @tableName='A';--表名!!!

SELECT CASE WHEN col.colorder = 1 THEN obj.name
ELSE ''
END AS 表名,
col.colorder AS 序號 ,
col.name AS 列名 ,
ISNULL(ep.[value], '') AS 列說明 ,
t.name AS
 
 資料型別 ,
col.length AS 長度 ,
ISNULL(COLUMNPROPERTY(col.id, col.name, 'Scale'), 0) AS 小數位數 ,
CASE WHEN COLUMNPROPERTY(col.id, col.name, 'IsIdentity') = 1 THEN '√'
ELSE ''
END AS 標識 ,
CASE WHEN EXISTS ( SELECT 1
FROM dbo.sysindexes si
INNER JOIN dbo.sysindexkeys sik ON si.id = sik.id
AND si.indid = sik.indid
INNER
 
 JOIN dbo.syscolumns sc ON sc.id = sik.id
AND sc.colid = sik.colid
INNER JOIN dbo.sysobjects so ON so.name = si.name
AND so.xtype = 'PK'
WHERE sc.id = col.id
AND sc.colid = col.colid ) THEN '√'
ELSE ''
END AS 主鍵 ,
CASE WHEN col.isnullable = 1 THEN '√'
ELSE ''
END AS 允許空 ,
ISNULL(comm.text, '') AS 預設值
FROM dbo.syscolumns col
LEFT JOIN dbo.systypes t ON col.xtype = t.xusertype
inner JOIN dbo.sysobjects obj ON col.id = obj.id
AND obj.xtype = 'U'
AND obj.status >= 0
LEFT JOIN dbo.syscomments comm ON col.cdefault = comm.id
LEFT JOIN sys.extended_properties ep ON col.id = ep.major_id
AND col.colid = ep.minor_id
AND ep.name = 'MS_Description'
LEFT JOIN sys.extended_properties epTwo ON obj.id = epTwo.major_id
AND epTwo.minor_id = 0
AND epTwo.name = 'MS_Description'
WHERE obj.name = @tableName--表名
ORDER BY col.colorder ;