Question

我在这里阅读的许多问题/解决方案都描述了如何单独使用STRING_AGG，我可以使用以下方法：

SELECT Offers.Id, STRING_AGG ( Offers2Currencies.CurrencyCode, ', ' ) AS Currencies

FROM  Offers  INNER JOIN Offers2Currencies ON Offers2Currencies.OfferID = 
dbo.Offers.ID

WHERE dbo.Offers.BuyerMemberId = '64ad10b9-85a6-4fc4-b9eb-d9f9af164d2b'

GROUP BY    dbo.Offers.Id

但我正在努力将其放入更大的查询中，例如：

SELECT
    dbo.Offers.ID,
    dbo.Offers.UTC,
    dbo.Organizations.Code,
    dbo.Entities.EntityAbbrev,
    dbo.Measurables.Name,
    dbo.Offers.Price,
    dbo.Offers.SellerMemberId,
    dbo.AspNetUsers.UserName
    --select STRING_AGG(dbo.Offers2Currencies.CurrencyCode, ', ') Currencies

FROM    dbo.Offers
  INNER JOIN dbo.AspNetUsers ON dbo.AspNetUsers.Id = dbo.Offers.SellerMemberId
  INNER JOIN dbo.MemberCreditRatings ON dbo.AspNetUsers.Id = dbo.MemberCreditRatings.MemberGUID
  INNER JOIN dbo.Measurables ON dbo.Offers.MeasurableID = dbo.Measurables.ID
  INNER JOIN dbo.Entities ON dbo.Offers.EntityID = dbo.Entities.ID
  INNER JOIN dbo.Organizations ON dbo.Measurables.OrganizationID = dbo.Organizations.ID
  --INNER JOIN dbo.Offers2Currencies ON dbo.Offers2Currencies.OfferID = dbo.Offers.ID
  AND dbo.Entities.OrganizationID = dbo.Organizations.ID

WHERE   dbo.Offers.BuyerMemberId = '64ad10b9-85a6-4fc4-b9eb-d9f9af164d2b'

Answer 1

我（想）我想出来了 - 将所有选择的字段放入Group By中（尽管它们永远不会超出第一组） - 请参阅http://sqlfiddle.com/#!18/aaa65/7（并建议是否更好或替代解决方案）

Azure SQL STRING_AGG作为较大Query的一部分

1 个答案: