SELECT  d.name AS 表名 ,        f.value AS 表说明,        字段序号 = a.colorder ,        字段名 = a.name ,        标识 = CASE WHEN COLUMNPROPERTY(a.id, a.name, 'IsIdentity') = 1 THEN '√'                  ELSE ''             END ,        主键 = 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 ,        类型 = b.name ,        占用字节数 = a.length ,        长度 = COLUMNPROPERTY(a.id, a.name, 'PRECISION') ,        小数位数 = ISNULL(COLUMNPROPERTY(a.id, a.name, 'Scale'), 0) ,        允许空 = CASE WHEN a.isnullable = 1 THEN '√'                   ELSE ''              END ,        默认值 = ISNULL(e.text, '') ,        字段说明 = ISNULL(g.[value], '')FROM    syscolumns a        LEFT   JOIN systypes b ON a.xtype = b.xusertype        INNER   JOIN sysobjects d ON a.id = d.id                                     AND d.xtype = 'U'                                     AND d.name <> 'dtproperties'        LEFT   JOIN syscomments e ON a.cdefault = e.id        LEFT   JOIN sys.extended_properties g ON a.id = g.major_id                                                 AND a.colid = g.minor_id        LEFT   JOIN sys.extended_properties f ON d.id = f.major_id                                                 AND f.minor_id = 0WHERE   d.name = 'XXX'         --如果只查询指定表,加上此条件   ORDER BY a.id ,        a.colorder