我在以下情况下遇到了一些麻烦:我有一个创建两个临时表的查询,以及以下选择将它们连接在一起 -
SELECT * FROM result
INNER JOIN result2 ON result2.packetDetailsId = result.packetDetailsId
然后,我尝试通过连接一些结果字段来创建另一列,然后使用它来引用/查询另一个表。有没有办法在一个查询中完成这个?我应该远离临时表吗?
再次提前感谢您。
更新:如果我尝试为两个临时表的组合设置别名,我会收到一条错误消息,指出 [Err] 1060 - Duplicate column name 'packetDetailsId'
select * from (
SELECT * FROM result
INNER JOIN result2 ON result2.packetDetailsId = result.packetDetailsId) as myalias
另一个更新:我几乎让它作为一个查询工作,但我在我连接的列中得到结果“(BLOB)”:
select packet_details.packetDetailsId,products.productId,Credit,AccountNum,OrderStat, CONCAT(products.productId,Credit,'_',OrderStat) as consol from (
select packetDetailsId, GROUP_CONCAT(Credit) AS Credit, GROUP_CONCAT(AccountNum) AS AccountNum, GROUP_CONCAT(OrderStat) AS OrderStat FROM
( SELECT pd_extrafields.packetDetailsId,
CASE WHEN pd_extrafields.ex_title LIKE ('%Credit%')
THEN pd_extrafields.ex_value ELSE NULL END as Credit,
CASE WHEN pd_extrafields.ex_title LIKE ('%Account%')
THEN pd_extrafields.ex_value ELSE NULL END as AccountNum,
CASE WHEN pd_extrafields.ex_title LIKE ('%Existing%')
THEN pd_extrafields.ex_value ELSE NULL END as OrderStat
FROM pd_extrafields )AS TempTab GROUP BY packetDetailsId ) as alias2
INNER JOIN packet_details ON alias2.packetDetailsId = packet_details.packetDetailsId
在 packet_details.packetDetailsId = sales.packetDetailsId 上的 INNER JOIN sales
在 sales.saleId = sold_products.saleId 内加入已售产品