SQL：条件百分比增加

Question

Using Bartender custom SQL, I am attempting to add 20% to a label price if it is VAT applicable (ie if it has a tax ID of 2583)

The information for tax is stored in one database table called StockItem.TaxCodeID, and the price is stored in another called StockItemPrice.Price.

Is there a way to make this happen? I'm very new to SQL and have gotten by so far using the query and join tools included with bartender, and the code it generates makes logical sense to me.

SELECT "dbo"."StockItem"."Code", "dbo"."StockItem"."Name", "dbo"."StockItem"."TaxCodeID", "dbo"."StockItem"."PartNumber", "StockItemPrice"."Price" FROM "dbo"."StockItem" , "StockItemPrice"
WHERE "dbo"."StockItem"."ItemID" = "StockItemPrice"."ItemID" 
AND 
   ("StockItemPrice"."PriceBandID" = 1001 
      AND "dbo"."StockItem"."Code" LIKE '6%' 
      AND "dbo"."StockItem"."PartNumber" LIKE '%?BarcodeSearch1%' 
      AND "dbo"."StockItem"."Name" LIKE '%?NameSearch%' 
      AND "dbo"."StockItem"."TaxCodeID" = 258

Sorry in advance if I haven't provided enough information, I'll do my best to add more if needed!

Answer 1

Use case when statement,

select *, CASE taxid
     WHEN taxid=2538 THEN price *1.20
     else price
END as newcolumn
from stockitem