SQL查看表结构以及表说明

Posted 2020-09-17 无懈可击

SELECT  CASE WHEN col.colorder = 1 THEN obj.name
                  ELSE \'\'
             END AS 表名,
        col.colorder AS 序号 ,
        col.name AS 列名 ,
        ISNULL(ep.[value], \'\') AS 列说明 ,
        t.name AS 数据类型 ,
        col.length AS 长度 ,
        ISNULL(COLUMNPROPERTY(col.id, col.name, \'Scale\'), 0) AS 小数位数 ,
        CASE WHEN COLUMNPROPERTY(col.id, col.name, \'IsIdentity\') = 1 THEN \'√\'
             ELSE \'\'
        END AS 标识 ,
        CASE WHEN EXISTS ( SELECT   1
                           FROM     dbo.sysindexes si
                                    INNER JOIN dbo.sysindexkeys sik ON si.id = sik.id
                                                              AND si.indid = sik.indid
                                    INNER JOIN dbo.syscolumns sc ON sc.id = sik.id
                                                              AND sc.colid = sik.colid
                                    INNER JOIN dbo.sysobjects so ON so.name = si.name
                                                              AND so.xtype = \'PK\'
                           WHERE    sc.id = col.id
                                    AND sc.colid = col.colid ) THEN \'√\'
             ELSE \'\'
        END AS 主键 ,
        CASE WHEN col.isnullable = 1 THEN \'√\'
             ELSE \'\'
        END AS 允许空 ,
        ISNULL(comm.text, \'\') AS 默认值
FROM    dbo.syscolumns col
        LEFT  JOIN dbo.systypes t ON col.xtype = t.xusertype
        inner JOIN dbo.sysobjects obj ON col.id = obj.id
                                         AND obj.xtype = \'U\'
                                         AND obj.status >= 0
        LEFT  JOIN dbo.syscomments comm ON col.cdefault = comm.id
        LEFT  JOIN sys.extended_properties ep ON col.id = ep.major_id
                                                      AND col.colid = ep.minor_id
                                                      AND ep.name = \'MS_Description\'
        LEFT  JOIN sys.extended_properties epTwo ON obj.id = epTwo.major_id
                                                         AND epTwo.minor_id = 0
                                                         AND epTwo.name = \'MS_Description\'
WHERE   obj.name = \'Person\'--数据库表名
ORDER BY col.colorder ;

　　例子：