使用sql语句获取数据库表的信息

下面的sql语句可以查看表的信息。其中modify_date和create_date可以根据表的修改时间来查看。如果不需要删除后，就能看到所有表的字段信息

SELECT     TOP (100) PERCENT d.name AS 表名, ISNULL(f.value, '') AS 表说明, a.name AS 字段名, 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 '是' ELSE '否' 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 '是' ELSE '否' END AS 允许空, ISNULL(e.text, '') AS 默认值, ISNULL(g.value, '') AS 字段说明
FROM         sys.syscolumns AS a LEFT OUTER JOIN
                      sys.systypes AS b ON a.xusertype = b.xusertype INNER JOIN
                      sys.sysobjects AS d ON a.id = d.id AND d.xtype = 'U' AND d.name <> 'dtproperties' LEFT OUTER JOIN
                      sys.syscomments AS e ON a.cdefault = e.id LEFT OUTER JOIN
                      sys.extended_properties AS g ON a.id = g.major_id AND a.colid = g.minor_id LEFT OUTER JOIN
                      sys.extended_properties AS f ON d.id = f.major_id AND f.minor_id = 0
WHERE     (d.name IN
                          ((SELECT     name
                              FROM         sys.tables
                              WHERE     (modify_date >= '2016-12-01') AND (create_date >= '2016-12-01'))))
ORDER BY a.id, a.colorder