Question

有没有更优雅的方式做这种事情？我有一个仪表板，我正在尝试填充信息，我只需要一些计数。如果可能的话，我想在一个查询中完成所有操作，但下面的查询似乎很愚蠢。任何建议将不胜感激。

    select 
UserCount = (
    select count(*) from net_ou 
        inner join art_asset on net_ou.net_ouid = art_asset.net_ouid
        inner join idb_interface on idb_interface.art_asset_id = art_asset.art_asset_id
        inner join nsd_interfacecode on nsd_interfacecode.nsd_interfacecodeid = idb_interface.nsd_interfacecodeid
        inner join nsd_interfacetype on nsd_interfacetype.nsd_interfacetypeid = idb_interface.nsd_interfacetypeid
        where net_ou.displayname = 'abcd' and nsd_interfacecode.code = 1 and nsd_interfacetype.physical = 1),
PrinterCount = (
    select count(*) as PrinterCount from net_ou 
        inner join art_asset on net_ou.net_ouid = art_asset.net_ouid
        inner join idb_interface on idb_interface.art_asset_id = art_asset.art_asset_id
        inner join nsd_interfacecode on nsd_interfacecode.nsd_interfacecodeid = idb_interface.nsd_interfacecodeid
        inner join nsd_interfacetype on nsd_interfacetype.nsd_interfacetypeid = idb_interface.nsd_interfacetypeid
        where net_ou.displayname = 'abcd' and nsd_interfacecode.code = 2 and nsd_interfacetype.physical = 1),
TrunkCount = (
    select count(*) as TrunkCount from net_ou 
        inner join art_asset on net_ou.net_ouid = art_asset.net_ouid
        inner join idb_interface on idb_interface.art_asset_id = art_asset.art_asset_id
        inner join nsd_interfacecode on nsd_interfacecode.nsd_interfacecodeid = idb_interface.nsd_interfacecodeid
        inner join nsd_interfacetype on nsd_interfacetype.nsd_interfacetypeid = idb_interface.nsd_interfacetypeid
        where net_ou.displayname = 'abcd' and nsd_interfacecode.code = 4 and nsd_interfacetype.physical = 1)

Answer 1

您可以使用CASE：

select 
        SUM(CASE WHEN nsd.interfacecode.code = 1 THEN 1 ELSE 0 END) as UserCount,
        SUM(CASE WHEN nsd.interfacecode.code = 2 THEN 1 ELSE 0 END) as PrinterCount, 
        SUM(CASE WHEN nsd.interfacecode.code = 4 THEN 1 ELSE 0 END) as TrunkCount 
    from net_ou 
        inner join art_asset on net_ou.net_ouid = art_asset.net_ouid
        inner join idb_interface on idb_interface.art_asset_id = art_asset.art_asset_id
        inner join nsd_interfacecode on nsd_interfacecode.nsd_interfacecodeid = idb_interface.nsd_interfacecodeid
        inner join nsd_interfacetype on nsd_interfacetype.nsd_interfacetypeid = idb_interface.nsd_interfacetypeid
    where net_ou.displayname = 'abcd' 
    and nsd_interfacetype.physical = 1

Answer 2

select nsd_interfacecode.code, count(*) from net_ou 
        inner join art_asset on net_ou.net_ouid = art_asset.net_ouid
        inner join idb_interface on idb_interface.art_asset_id = art_asset.art_asset_id
        inner join nsd_interfacecode on nsd_interfacecode.nsd_interfacecodeid = idb_interface.nsd_interfacecodeid
        inner join nsd_interfacetype on nsd_interfacetype.nsd_interfacetypeid = idb_interface.nsd_interfacetypeid
        where net_ou.displayname = 'abcd' and and nsd_interfacetype.physical = 1
group by nsd_interfacecode.code

这应该给你你的价值观，假设我没有错过任何不同的查询。

一个查询的多个结果

2 个答案: