获取MS SQL库数据字典的经典SQL语句

SELECT  sysobjects.name  AS   [ table ] , sysproperties. [ value ]   AS  表说明, 
      syscolumns.name  AS  field, properties. [ value ]   AS  字段说明, systypes.name  AS  type, 
      syscolumns.length,  ISNULL ( COLUMNPROPERTY (syscolumns.id, syscolumns.name, 
       ' Scale ' ),  0 )  AS  小数位数, syscolumns.isnullable  AS   isnull , 
       CASE   WHEN  syscomments. text   IS   NULL  
       THEN   ''   ELSE  syscomments. text   END   AS   [ Default ] , 
       CASE   WHEN   COLUMNPROPERTY (syscolumns.id, syscolumns.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  =  syscolumns.id  AND  colid  =  syscolumns.colid))) 
       THEN   ' √ '   ELSE   ''   END   AS  主键
FROM  syscolumns  INNER   JOIN
      sysobjects  ON  sysobjects.id  =  syscolumns.id  INNER   JOIN
      systypes  ON  syscolumns.xtype  =  systypes.xtype  LEFT   OUTER   JOIN
      sysproperties properties  ON  syscolumns.id  =  properties.id  AND  
      syscolumns.colid  =  properties.smallid  LEFT   OUTER   JOIN
      sysproperties  ON  sysobjects.id  =  sysproperties.id  AND  
      sysproperties.smallid  =   0   LEFT   OUTER   JOIN
      syscomments  ON  syscolumns.cdefault  =  syscomments.id
WHERE  (sysobjects.xtype  =   ' U ' )