SQL一次查出相关类容避免长时间占用表(上)

/*
server:
db: EDI
*/
-- 以下案例多次查询同一张表，仅有组合条件Name+Direction不同
--可以使用一次查出相关类容避免长时间占用表
USE EDI
GO
DECLARE @OutBoundBusinessID_PO int
       ,@InboundBusinessID_ItemCatalog int
       ,@InboundBusinessID_Inventory int
       ,@InboundBusinessID_ShipNotice int
	   ,@InboundBusinessID_FunctionAck int
	   ,@OutboundBusinessID_FunctionAck int

SELECT TOP 1
    @OutBoundBusinessID_PO = ID
FROM dbo.EDI_CFG_Business WITH(NOLOCK)
WHERE
    Name = 'PO'
    AND Direction = 'O'
SELECT TOP 1
    @InboundBusinessID_ItemCatalog = ID
FROM dbo.EDI_CFG_Business WITH(NOLOCK)
WHERE
    Name = 'ItemCatalog'
    AND Direction = 'I'
SELECT TOP 1
    @InboundBusinessID_Inventory = ID
FROM dbo.EDI_CFG_Business WITH(NOLOCK)
WHERE
    Name = 'Inventory'
    AND Direction = 'I'
SELECT TOP 1
    @InboundBusinessID_ShipNotice = ID
FROM dbo.EDI_CFG_Business WITH(NOLOCK)
WHERE
    Name = 'ShipNotice'
    AND Direction = 'I'
SELECT TOP 1
    @InboundBusinessID_FunctionAck = ID
FROM dbo.EDI_CFG_Business WITH(NOLOCK)
WHERE
    Name = 'FunctionAck'
    AND Direction = 'I'
SELECT TOP 1
    @OutboundBusinessID_FunctionAck = ID
FROM dbo.EDI_CFG_Business WITH(NOLOCK)
WHERE
    Name = 'FunctionAck'
    AND Direction = 'O'
select  @OutBoundBusinessID_PO
       ,@InboundBusinessID_ItemCatalog
       ,@InboundBusinessID_Inventory
       ,@InboundBusinessID_ShipNotice
	   ,@InboundBusinessID_FunctionAck
	   ,@OutboundBusinessID_FunctionAck 

-----更改后
USE EDI
GO
DECLARE @OutBoundBusinessID_PO int
       ,@InboundBusinessID_ItemCatalog int
       ,@InboundBusinessID_Inventory int
       ,@InboundBusinessID_ShipNotice int
	   ,@InboundBusinessID_FunctionAck int
	   ,@OutboundBusinessID_FunctionAck int

select @OutBoundBusinessID_PO=POO
	,@InboundBusinessID_ItemCatalog=ItemCatalogI
	,@InboundBusinessID_Inventory=InventoryI
	,@InboundBusinessID_ShipNotice=ShipNoticeI
	,@InboundBusinessID_FunctionAck=FunctionAckI
	,@OutboundBusinessID_FunctionAck=FunctionAckO
--select POO,ItemCatalogI,InventoryI,ShipNoticeI,FunctionAckI,FunctionAckO
from
(
	select ID,Name_Direction
	from
	(
		select ID,Name+Direction as Name_Direction FROM dbo.EDI_CFG_Business WITH(NOLOCK)
		where
		Name in('PO','ItemCatalog','Inventory','ShipNotice','FunctionAck')
		and  Direction in('I','O')
	) as T1
	where Name_Direction in('POO','ItemCatalogI','InventoryI','ShipNoticeI','FunctionAckI','FunctionAckO')
) as T2
pivot
(
	max(ID)
	for
	Name_Direction in([POO],[ItemCatalogI],[InventoryI],[ShipNoticeI],[FunctionAckI],[FunctionAckO]) 

) as piv

select  @OutBoundBusinessID_PO
       ,@InboundBusinessID_ItemCatalog
       ,@InboundBusinessID_Inventory
       ,@InboundBusinessID_ShipNotice
	   ,@InboundBusinessID_FunctionAck
	   ,@OutboundBusinessID_FunctionAck