SQLServer中查询表结构（表主键、列说明、列数据类型、所有表名）的Sql语句

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1、查询数据库中的所有表名称：

SELECT name FROM SysObjects Where XType='U' ORDER BY Name

结果：

2、查询数据库中指定表的表结构：

--快速查看表结构
SELECT  CASE WHEN col.colorder = 1 THEN obj.nameELSE ''END AS 表名,col.colorder AS 序号 ,col.name AS 列名 ,ISNULL(ep.[value], '') AS 列说明 ,t.name AS 数据类型 ,col.length AS 长度 ,ISNULL(COLUMNPROPERTY(col.id, col.name, 'Scale'), 0) AS 小数位数 ,CASE WHEN COLUMNPROPERTY(col.id, col.name, 'IsIdentity') = 1 THEN '1'ELSE ''END AS 标识 ,CASE WHEN EXISTS ( SELECT   1FROM     dbo.sysindexes siINNER JOIN dbo.sysindexkeys sik ON si.id = sik.idAND si.indid = sik.indidINNER JOIN dbo.syscolumns sc ON sc.id = sik.idAND sc.colid = sik.colidINNER JOIN dbo.sysobjects so ON so.name = si.nameAND so.xtype = 'PK'WHERE    sc.id = col.idAND sc.colid = col.colid ) THEN '1'ELSE ''END AS 主键 ,CASE WHEN col.isnullable = 1 THEN '1'ELSE ''END AS 允许空 ,ISNULL(comm.text, '') AS 默认值
FROM    dbo.syscolumns colLEFT  JOIN dbo.systypes t ON col.xtype = t.xusertypeinner JOIN dbo.sysobjects obj ON col.id = obj.idAND obj.xtype = 'U'AND obj.status >= 0LEFT  JOIN dbo.syscomments comm ON col.cdefault = comm.idLEFT  JOIN sys.extended_properties ep ON col.id = ep.major_idAND col.colid = ep.minor_idAND ep.name = 'MS_Description'LEFT  JOIN sys.extended_properties epTwo ON obj.id = epTwo.major_idAND epTwo.minor_id = 0AND epTwo.name = 'MS_Description'
WHERE   obj.name = 'PkAutoInc'--表名
ORDER BY col.colorder ;