[英]Update Statement with Sub-query
我有以下查询:
DECLARE @fromdate date = '2016-09-01'
DECLARE @todate date = '2016-10-03'
SELECT
inventoryKey,
SUM(DATEDIFF(DAY, transdate, @todate) * qty) AS daysavailable
FROM
(SELECT
InventoryKey,
CONVERT(date, invch.transactiondate) AS transdate,
SUM(invch.additionqty + invch.SubtractionQty) AS qty
FROM
dw.dbo.inventorychange invch
WHERE
(TransactionDate IS NOT NULL OR TransactionType <> '')
AND TransactionType NOT IN ('TRANSFER IN', 'TRANSFER OUT', 'BALANCE', 'LEASED')
AND InventoryKey = 'A000HV9T'
AND TransactionDate BETWEEN @fromdate AND @todate
GROUP BY
invch.TransactionDate, InventoryKey) AS a
GROUP BY
InventoryKey
单独运行完全可以。 但是,我正在创建一个存储过程,该过程将执行许多计算,其中之一就是上述计算。 该存储过程将返回一个表,该表中的实际值将被更新。 但是,我不完全知道如何在子查询更新语句中准确地进行翻译。
这是我下面的内容:
declare @inventorychanges table
(
inventorykey nvarchar(10),
warehouse nvarchar(10),
transdate date,
trantype nvarchar(25),
additionqty numeric,
subtractionqty numeric
)
insert into @inventorychanges (inventorykey, warehouse, transdate, trantype, additionqty, subtractionqty)
select invch.inventorykey, invch.warehouse, invch.TransactionDate, invch.TransactionType, invch.additionqty, invch.SubtractionQty
from dw.dbo.inventorychange invch
join @icodes ic on ic.inventorykey = invch.inventorykey
WHERE invch.TransactionDate BETWEEN @fromdate AND @todate
and invch.warehouse = ISNULL(@location, '')
AND (TransactionDate IS NOT NULL OR TransactionType <> '')
AND TransactionType NOT IN ('TRANSFER IN' ,'TRANSFER OUT', 'BALANCE', 'LEASED')
/* Update Days Available*/
UPDATE ic
SET ic.daysavaialblepsgear = (
SELECT SUM(invch.additionqty + invch.subtractionqty)
)
FROM @icodes ic, @inventorychanges invch
where invch.inventorykey = ic.inventorykey
但是,这似乎并没有按预期的那样工作。 任何人都可以为我指出正确的方向,以实现我的目标。
这是使用CTE
一种方法
DECLARE @fromdate date = '2016-09-01'
DECLARE @todate date = '2016-10-03'
;with cte as
(
SELECT
inventoryKey,
SUM(DATEDIFF(DAY, transdate, @todate) * qty) AS daysavailable
FROM
(SELECT
InventoryKey,
CONVERT(date, invch.transactiondate) AS transdate,
SUM(invch.additionqty + invch.SubtractionQty) AS qty
FROM
dw.dbo.inventorychange invch
WHERE
(TransactionDate IS NOT NULL OR TransactionType <> '')
AND TransactionType NOT IN ('TRANSFER IN', 'TRANSFER OUT', 'BALANCE', 'LEASED')
AND InventoryKey = 'A000HV9T'
AND TransactionDate BETWEEN @fromdate AND @todate
GROUP BY
invch.TransactionDate, InventoryKey) AS a
GROUP BY
InventoryKey
)
UPDATE ic
SET ic.daysavaialblepsgear = invch .daysavailable
FROM @icodes ic
Join CTE invch
ON invch.inventorykey = ic.inventorykey
您还可以将整个子查询放置在JOIN
的CTE
处
UPDATE ic
SET ic.daysavaialblepsgear = invch .daysavailable
FROM @icodes ic
JOIN (SELECT inventorykey,
Sum(Datediff(day, transdate, @todate) * qty) AS
daysavailable
FROM (SELECT inventorykey,
CONVERT(DATE, invch.transactiondate) AS
transdate,
Sum(invch.additionqty + invch.subtractionqty) AS qty
FROM dw.dbo.inventorychange invch
WHERE ( transactiondate IS NOT NULL
OR transactiontype <> '' )
AND transactiontype NOT IN (
'TRANSFER IN', 'TRANSFER OUT',
'BALANCE',
'LEASED'
)
AND inventorykey = 'A000HV9T'
AND transactiondate BETWEEN @fromdate AND @todate
GROUP BY invch.transactiondate,
inventorykey) AS a
GROUP BY inventorykey) invch
ON invch.inventorykey = ic.inventorykey
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