1
我需要将subquery
结果存储在变量中,并将其用于主查询中以节省查询的执行时间,否则我必须再次为此写入相同的subquery
。下面的代码给出:如何将子查询结果存储在变量中并在主查询中使用
select DISTINCT
convert(datetime,substring(o.TransactTime, 0,9), 112) + CONVERT(datetime, substring(o.transacttime,10,LEN(o.transacttime)), 114),
o.clordid,
ack.strategyid,
o.Account,
o.AllocAccount,
o.symbol,
o.price,
ISNULL((Select Top 1 L.orderqty from order_msgs_incoming1 L where o.clordid=L.clordid and L.msg_id in (17,18,19,22,59,44) order BY L.transacttime DESC),o.orderqty) orderqty,
o.InClOrdID,
(SELECT ISNULL(ISNULL((Select Top 1 L.orderqty from order_msgs_incoming1 L where o.clordid=L.clordid and L.msg_id in (17,18,19,22,59,44) order BY L.transacttime DESC),o.orderqty)-sum(ex.LastShares),ISNULL((Select Top 1 L.orderqty from order_msgs_incoming1 L where o.clordid=L.clordid and L.msg_id in (17,18,19,22,59,44) order BY L.transacttime DESC),o.orderqty)) from order_msgs_incoming<TblIndx> ex where
o.Clordid = ex.clordid
) RemainingQuantity
from order_msgs_incoming1 o
/*picking ack rows to update strategyId since StrategyId is null for 43 but populated for 46*/
left outer join order_msgs_incoming1 ack on o.clordid = ack.clordid and ack.msg_id=46
where
/*row for new order only since that contains all columns values*/
o.msg_id = 43
我需要这样的
select DISTINCT
variableValue=ISNULL((Select Top 1 L.orderqty from order_msgs_incoming1 L where o.clordid=L.clordid and L.msg_id in (17,18,19,22,59,44) order BY L.transacttime DESC),o.orderqty) orderqty,
o.InClOrdID,
(SELECT ISNULL(variableValue-sum(ex.LastShares),variableValue) from order_msgs_incoming<TblIndx> ex where
o.Clordid = ex.clordid
) RemainingQuantity
from order_msgs_incoming1 o
请帮助我。
嘿,我不走子查询结果在单独的查询中,并在其他查询中使用相同。想要将结果带入变量并在主查询中使用。 – 2014-10-28 06:28:12
@NeerajDubey我不明白你的观点。你不能在一个单独的查询中得到“子查询结果”,如果它是标量,它必须在表中或变量中。我想我已经做了你想要的同样的事情。 “orderqty”列的值现在从变量“variableValue”中填充。 – Vaibhav 2014-10-28 06:54:28