我是SQL的新手，我试图做一个简单的查询，从许多不同的表中收集有关一个订单的许多信息。
这是我的代码（主要是select语句）：
Select
o.Customer_Purchase_Order_Number as Shopify_Num,
o.Control_Number,
o.Date_Entered as AMT_Timestamp,
case when p.PickTicket_Number is null then i.PickTicket_Number else p.PickTicket_Number end PickTicket_Number,
i.Invoice_Number,
CASE WHEN o.Order_Status=30 THEN 'CANCELED'
WHEN o.Order_Status=45 THEN 'SHIPPED'
WHEN o.Order_Status=10 THEN 'NORMAL'
WHEN o.Order_Status=20 THEN 'NORMAL'
END Order_Status,
od.Odet_Line_Number,
od.Item_Number,
st.Description,
od.Color_Code,
c.Color_Description,
o.Order_Value as Total_Price_Before_Discount,
od.Price*od.Quantity_Ordered as Line_Price_Before_Discount,
od.Discount_Value,
od.Discount_Percentage,
od.Price*od.Quantity_Ordered-od.Discount_Value as Line_Price_After_Discount,
SUM(od.Price*od.Quantity_Ordered-od.Discount_Value) OVER(PARTITION BY o.control_number) AS Total_Price_After_Discount,
od.Tax_Value, od.Tax_Percentage,
od.Quantity_Ordered,
od.Quantity_Allocated,
od.Quantity_Invoiced,
CASE WHEN od.Line_Status=90 THEN 'ALLOCATED'
WHEN od.Line_Status=80 THEN 'CANCELED'
WHEN od.Line_Status=70 THEN 'SHIPPED'
WHEN od.Line_Status=50 THEN 'NORMAL'
END Line_Status,
SUM(od.Freight_Charges) OVER(PARTITION BY o.control_number) AS Shipping_Cost_To_Customer,
case When sh.packslip is not null then 'SHIPPED & UPLOADED' ELSE z.status END Accellos_Status,
sh.Date_modfy Accellos_Timestamp,
o.Warehouse_Code,
b.UPS_Tracking_Number AMT_Tracking_Number,
sm.TRACKTRACE Accellos_Tracking_Number,
sh.SHIP_NAME ,
sh.SHIP_ADD1 ,
sh.SHIP_ADD2 ,
sh.SHIP_CITY ,
sh.SHIP_PROV ,
sh.SHIP_ZIP,
o.Ship_Via_Code,
sv.Description_1 as Ship_Descrp,
sh.SHIP_VIA,
sh.SHIP_SERVC,
sh.SERVICE,
sh.SHIP_NUM,
sh.COST_SHIP,
sh.SHIP_WGHT
from [JMNYC-AMTDB].[AMTPLUS].[dbo].Orders o (nolock)
join [JMNYC-AMTDB].[AMTPLUS].[dbo].Order_Detail od (nolock) on o.Company_Code=od.Company_Code and o.Division_Code=od.Division_Code and o.Control_Number=od.Control_Number
left join [JMNYC-AMTDB].[AMTPLUS].[dbo].PickTickets P (nolock) on o.Company_Code=p.Company_Code and o.Division_Code=p.Division_Code and o.Control_Number=p.Control_Number
left join [JMNYC-AMTDB].[AMTPLUS].[dbo].Invoices i (nolock) on o.Company_Code=i.Company_Code and o.Division_Code=i.Division_Code and o.Control_Number=i.Control_Number
left join [JMNYC-AMTDB].[AMTPLUS].[dbo].box b (nolock) on o.Company_Code=b.Company_Code and o.Division_Code=b.Division_Code and i.PickTicket_Number=b.PickTicket_Number
left join [JMNYC-AMTDB].[AMTPLUS].[dbo].Color c (nolock) on od.Color_Code = c.Color_Code
left join [JMNYC-AMTDB].[AMTPLUS].[dbo].Style st (nolock) on o.Company_Code=st.Company_Code and o.Division_Code=st.Division_Code and od.item_number=st.item_number and c.color_code = st.color_code
left join [JMNYC-AMTDB].[AMTPLUS].[dbo].Ship_Via_File sv (nolock) on o.ship_via_code = sv.ship_via_code
left join pickhead ph (nolock) on p.PickTicket_Number=ph.packslip
left join Z_Status z on ph.PROCSTEP=z.procstep
left join SHIPHIST sh (nolock) on case when p.PickTicket_Number is null then i.PickTicket_Number else p.PickTicket_Number end=sh.packslip
left join SHIPMSTR2 sm (nolock) on case when p.PickTicket_Number is null then i.PickTicket_Number else p.PickTicket_Number end=sm.packslip
where LTRIM(RTRIM(o.Company_Code))+LTRIM(RTRIM(o.Division_Code))='03001' and o.Customer_Number='ecom2x'
and o.Customer_Purchase_Order_Number='3112480'
此查询大约需要10秒钟才能运行。有什么办法可以提高效率？它已经是准系统了。我假设我应该首先尝试最小化任何冗余表，因为我要加入的这些表非常大。如果我需要所有选择的桌子，我能做些什么吗？当我要加入的表中有很多列时，它们只是针对整个表中的一个特定列而加入。这会改变什么吗？
因此，我可以从数据库表中创建一堆新表，仅选择所需的列。然后我可以改用那些表。我试图做这样的事情，但它只会使查询运行无休止（或至少一分钟）。
这是我尝试的：
我认为它失败了，因为我从本质上告诉它重新创建这个庞大的表，这需要很多时间。
SELECT Company_Code, Division_Code, Control_Number, Customer_Purchase_Order_Number,
Date_Entered, Order_Status, Order_Value,
Warehouse_Code, Ship_Via_Code
into #o from [JMNYC-AMTDB].[AMTPLUS].[dbo].Orders OT (nolock)
SELECT Company_Code, Division_Code, Control_Number, Odet_Line_Number,
Item_Number, Color_Code, Price,
Discount_Value, Discount_Percentage, Tax_Value, Tax_Percentage,
Quantity_Ordered, Quantity_Allocated, Quantity_Invoiced, Line_Status, Freight_Charges
into #od from [JMNYC-AMTDB].[AMTPLUS].[dbo].Order_Detail ODT (nolock)
.
.
.
from #o (nolock)
join #od (nolock) on o.Company_Code=od.Company_Code and o.Division_Code=od.Division_Code and o.Control_Number=od.Control_Number
left join #p (nolock) on o.Company_Code=p.Company_Code and o.Division_Code=p.Division_Code and o.Control_Number=p.Control_Number
.
.
.
有人知道如何加快此代码的速度/总体上使它更有效吗？