Sql 基于2列从联合结果中筛选重复项
我得到了两个select查询的并集,其中一个被查询的表是一个临时表,以确保输出记录,因此临时表具有每个日期的预期输出,但Sale列的默认值为0 示例输出结果如下所示:Sql 基于2列从联合结果中筛选重复项,sql,sql-server,sql-server-2008,azure-sql-database,Sql,Sql Server,Sql Server 2008,Azure Sql Database,我得到了两个select查询的并集,其中一个被查询的表是一个临时表,以确保输出记录,因此临时表具有每个日期的预期输出,但Sale列的默认值为0 示例输出结果如下所示: ProductID | Product Desc | TransactionDate | Sale 1011021 | SD DOG | 2017-01-07 | 0 1011021 | SD DOG | 2017-01-07 | $17 1011021 | SD D
ProductID | Product Desc | TransactionDate | Sale
1011021 | SD DOG | 2017-01-07 | 0
1011021 | SD DOG | 2017-01-07 | $17
1011021 | SD DOG | 2017-01-14 | 0
1011021 | SD DOG | 2017-01-14 | $15
1011021 | SD DOG | 2017-01-21 | $21
1011021 | SD DOG | 2017-01-28 | 0
1011021 | SD DOG | 2017-01-28 | $21
Union基于行删除重复项,如何使其基于productID和transactionDate列删除重复项,在Sale为0的位置删除重复项
-下面的查询
SELECT transactionProducts.productID, products.productDesc, sum(salePrice) as Sale, transactionDate
FROM products LEFT JOIN transactionProducts on products.productID = transactionProducts.productID
LEFT JOIN transactions ON transactionProducts.transactionID = transactions.transactionID
LEFT JOIN productCategory on productCategory.productID = products.productID
LEFT JOIN categories on categories.categoryID = productCategory.categoryID
WHERE (transactionProducts.productID='123' AND transactions.transactionDate='2017-01-12'
Group by transactionProducts.productID, transactionDate
UNION select * from "temptable" group by productID, productDesc, Sale, transactionDate
ORDER BY transactionDate
这个怎么样:
SELECT transactionProducts.productID, products.productDesc, sum(salePrice) as Sale, transactionDate
FROM products LEFT JOIN transactionProducts on products.productID = transactionProducts.productID
LEFT JOIN transactions ON transactionProducts.transactionID = transactions.transactionID
LEFT JOIN productCategory on productCategory.productID = products.productID
LEFT JOIN categories on categories.categoryID = productCategory.categoryID
WHERE (transactionProducts.productID='123' AND transactions.transactionDate='2017-01-12'
AND sum(salePrice) > 0 )
Group by transactionProducts.productID, transactionDate
UNION select * from "temptable" group by productID, productDesc, Sale, transactionDate
ORDER BY transactionDate
注意,我在第一个SELECTWHERE子句中添加了AND和sumsalePrice>0
HTH使用“不存在”从临时表中选择结果集中不存在的行:
. . .
UNION ALL
SELECT tt.*
FROM temptable tt
WHERE NOT EXISTS (SELECT 1
FROM transactionproducts tp JOIN
transaction t
ON t.transactionID = tp.transactionID
WHERE tp.productId = tt.productId AND
t.transactionDate = tt.transactionDate
)
GROUP BY productID, productDesc, Sale, transactionDate
ORDER BY transactionDate
如果两个销售值都为零,或者都非零,会发生什么情况?