Question

我正在尝试编写一个SQL查询，该查询将显示包含应用程序＆＃34; iMobilePOS＆＃34;的任何设备的商店，ID，MAC和AppName。和＆＃34; StoreFulfill＆＃34;在AppName列中。我非常接近......我想要做的是每个设备只显示两行。一个包含＆＃34; iMobile＆＃34; AppName值，另一个包含＆＃34; StoreFill＆＃34; AppName值。目前，结果显示设备已安装的每个应用程序的一行...这是我的查询参考：

SELECT DISTINCT storenumber, 
                registerid, 
                wifi_mac, 
                appname 
FROM   mpos_health.dbo.mdat_data_report AS mdat 
       INNER JOIN mpos_health.dbo.mpos_health_report AS mpos 
               ON mdat.wifi_mac = mpos.wifimac 
WHERE  EXISTS (SELECT * 
               FROM   mpos_health.dbo.mpos_health_report AS mpos 
               WHERE  mpos.wifimac = mdat.wifi_mac 
                      AND appname = 'iMobilePOS') 
       AND EXISTS (SELECT * 
                   FROM   mpos_health.dbo.mpos_health_report AS mpos 
                   WHERE  mpos.wifimac = mdat.wifi_mac 
                          AND appname = 'StoreFulfill');

我正在加入这两个表，因为它们都包含我想要包含的信息，它们的共同价值是设备的WiFiMAC。此查询以我想要的方式过滤设备，但它包括所有应用程序。例如，以下是我目前看到的内容：

在哪里，我不想看到MobileIron的第二行，我只想看到其他两行。包含iMobilePOS和StoreFulfill。

非常感谢任何建议。非常感谢你。

Answer 1

SELECT DISTINCT storenumber, 
            registerid, 
            wifi_mac, 
            appname 
FROM   mpos_health.dbo.mdat_data_report AS mdat 
INNER JOIN mpos_health.dbo.mpos_health_report AS mpos 
  ON mdat.wifi_mac = mpos.wifimac 
WHERE EXISTS (SELECT * 
               FROM mpos_health.dbo.mpos_health_report AS mpos 
               WHERE mpos.wifimac = mdat.wifi_mac 
                 AND appname = 'iMobilePOS')  
  AND EXISTS (SELECT * 
              FROM mpos_health.dbo.mpos_health_report AS mpos 
              WHERE mpos.wifimac = mdat.wifi_mac 
                AND appname = 'StoreFulfill') 
  AND Appname IN ('iMobilePOS, 'StoreFulfill')

Answer 2

您也可以使用 common table expression row_number() 来执行此操作：

with cte as (
  select distinct 
      storenumber
    , registerid
    , wifi_mac
    , appname 
    , rn = row_number() over (partition by wifi_mac order by AppName)
  from   mpos_health.dbo.mdat_data_report as mdat 
    inner join mpos_health.dbo.mpos_health_report as mpos 
      on mdat.wifi_mac = mpos.wifimac 
        and Appname in ('iMobilepos','StoreFulfill')
)
select 
      storenumber
    , registerid
    , wifi_mac
    , appname 
    , rn
  from cte o
  where exists (
    select 1 
    from cte as i
    where i.wifi_mac =o.wifimac
      and i.rn>1
      )

或使用union：

select distinct 
    storenumber
  , registerid
  , wifi_mac
  , appname 
from   mpos_health.dbo.mdat_data_report as mdat 
  inner join mpos_health.dbo.mpos_health_report as mpos 
    on mdat.wifi_mac = mpos.wifimac 
      and Appname = 'iMobilepos'
where exists (
  select 1
    from mpos_health.dbo.mpos_health_report as mpos 
    where mpos.wifimac = mdat.wifi_mac 
      and appname = 'StoreFulfill'
      )

union all

select distinct 
    storenumber
  , registerid
  , wifi_mac
  , appname 
from   mpos_health.dbo.mdat_data_report as mdat 
  inner join mpos_health.dbo.mpos_health_report as mpos 
    on mdat.wifi_mac = mpos.wifimac 
      and Appname = 'StoreFulfill'
where exists (
  select 1
    from mpos_health.dbo.mpos_health_report as mpos 
    where mpos.wifimac = mdat.wifi_mac 
      and appname = 'iMobilepos'
      )

SQL查询显示列的两个值？

2 个答案: