FROM txfield tLEFTJOIN txfieldpoint_hst tph ON fh.fhs_id我只需要一行(第一行)的"tph.tph_id“和类似这样的机制或者像这样的东西。到目前为止,我还不能实现正确的子查询或使用SQL函数。结果如下所示,根据最后一个ID,我只需要为每个og数字占
但是count返回的行数比它应该返回的行多。这是怎么回事?from `opportunities` leftjoin `opportunityTags` on `opportunities`.`id` = `opportunityTags`.select count(*) as aggregate
from `opportunit
在数据库中查找每个日历月的最高月度活跃用户,其中聚合了month列,使得每个月仅聚合为一行 MONTH([OrderDate]) AS Month, COUNT([CustomerID]) AS 'Number of Customers Per Month' [Sales].[SalesOrderHeader] AS A [Sales].[SalesOrderD
我想要这个输出:我的问题是: Equipment, EquipmentName, count(Equipment) as Count Operationso LEFT OUTER JOIN Equipments e ON ord.Equipment = e.EquipmentNumber Equipment,Equi
我正在尝试与where is null做一个左连接,这样我就可以得到那些没有销售额的广告,然后一个having count() =0,我就可以得到那些没有销售额的用户。SELECT seller.idJOIN advert ON advert.seller_id = seller.idJOIN sale accomplished_sale ON advert.id = accomplished_sal