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計數這裏是我的查詢:組由左連接表
$select d.*,
count(a.id) as delivered
from `dealerships` as d
left join `assignments` as a on (a.id_dealership = d.id)
group by d.id
order by d.name asc
現在這個工作,但它是重複計數線索。當我向羣組添加a.id_lead
時,它會弄亂一切。在assignments
表中有一列叫做id_lead
,我希望count()(delivered
)計算由id_lead
分組的分配總數,以便它忽略多於1行且具有相同的id_lead
。
完善。謝謝。 – scarhand 2011-12-14 01:27:17