查询表结构sql

 1 SELECT   CASE WHEN col.colorder = 1 THEN obj.name ELSE ‘‘ END AS 表名, col.colorder AS 序号, col.name AS 列名, 
 2                 ISNULL(ep.value, N‘‘) AS 列说明, t.name AS 数据类型, col.length AS 长度, ISNULL(COLUMNPROPERTY(col.id, col.name, 
 3                 ‘Scale‘), 0) AS 小数位数, CASE WHEN COLUMNPROPERTY(col.id, col.name, ‘IsIdentity‘) 
 4                 = 1 THEN ‘√‘ ELSE ‘‘ END AS 标识, CASE WHEN EXISTS
 5                     (SELECT   1
 6                      FROM      dbo.sysindexes si INNER JOIN
 7                                      dbo.sysindexkeys sik ON si.id = sik.id AND si.indid = sik.indid INNER JOIN
 8                                      dbo.syscolumns sc ON sc.id = sik.id AND sc.colid = sik.colid INNER JOIN
 9                                      dbo.sysobjects so ON so.name = si.name AND so.xtype = ‘PK‘
10                      WHERE   sc.id = col.id AND sc.colid = col.colid) THEN ‘√‘ ELSE ‘‘ END AS 主键, 
11                 CASE WHEN col.isnullable = 1 THEN ‘√‘ ELSE ‘‘ END AS 允许空, ISNULL(comm.text, N‘‘) AS 默认值
12 FROM      syscolumns AS col LEFT OUTER JOIN
13                 systypes AS t ON col.xtype = t.xusertype INNER JOIN
14                 sysobjects AS obj ON col.id = obj.id AND obj.xtype = ‘U‘ AND obj.status >= 0 LEFT OUTER JOIN
15                 syscomments AS comm ON col.cdefault = comm.id LEFT OUTER JOIN
16                 sys.extended_properties AS ep ON col.id = ep.major_id AND col.colid = ep.minor_id AND 
17                 ep.name = ‘MS_Description‘ LEFT OUTER JOIN
18                 sys.extended_properties AS epTwo ON obj.id = epTwo.major_id AND epTwo.minor_id = 0 AND 
19                 epTwo.name = ‘MS_Description‘
20 WHERE   (obj.name = ‘TB_ROOM_STATE‘)
21 ORDER BY 序号