SQL Server查询表结构信息

SQL Server查询表结构信息语句：

SELECT obj.name 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 '√'
ELSE ''
END AS 标识,
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 主键,
CASE WHEN col.isnullable = 1 THEN '√'
ELSE ''
END AS 允许空,
ISNULL(comm.text, '') AS 默认值
FROM dbo.syscolumns col
LEFT OUTER 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 OUTER JOIN dbo.syscomments comm ON col.cdefault = comm.id
LEFT OUTER JOIN sys.extended_properties ep ON col.id = ep.major_id AND col.colid = ep.minor_id AND ep.name = 'MS_Description'
LEFT OUTER 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'
ORDER BY col.colorder