sqlserver表结构查询

SELECT CASE WHEN a.colorder = 1 THEN d.name ELSE '' END AS 表名,
      CASE WHEN a.colorder = 1 THEN isnull(f.value, '') ELSE '' END AS 表说明,
      a.colorder AS 字段序号, a.name AS 字段名, CASE WHEN COLUMNPROPERTY(a.id,
      a.name, 'IsIdentity') = 1 THEN '√' ELSE '' END AS 标识,
      CASE WHEN EXISTS
          (SELECT 1
         from sysobjects
         WHERE xtype = 'PK' AND name IN
                   (SELECT name
                  from sysindexes
                  WHERE indid IN
                            (SELECT indid
                           from sysindexkeys
                           WHERE id = a.id AND colid = a.colid)))
      THEN '√' ELSE '' END AS 主键, b.name AS 类型, a.length AS 占用字节数,
      COLUMNPROPERTY(a.id, a.name, 'PRECISION') AS 长度,
      ISNULL(COLUMNPROPERTY(a.id, a.name, 'Scale'), 0) AS 小数位数,
      CASE WHEN a.isnullable = 1 THEN '√' ELSE '' END AS 允许空, ISNULL(e.text, '')
      AS 默认值, ISN