SQL使用来自同一表中其他行的数据更新行

Question

I have a large table of records where the primary key is an item code which is an int.

Lots of the records are out of date and I want to replace the information in those rows with information in other rows while keeping the old primary key.

So if I had two rows:

ITEM_CODE   LANGUAGE    LABEL
12345678    ENG         OLD LABEL
87654321    EN-GB       NEW LABEL

Im looking to write an SQL statement that will leave me with the following table

ITEM_CODE   LANGUAGE    LABEL
12345678    EN-GB       NEW LABEL
87654321    EN-GB       NEW LABEL

When I looked at the UPDATE statement I was looking for something like

UPDATE table
SET  language1 and label1 WITH language2 and label 2 
WHERE item code1 = item code 2

Im doing this all in SQL Server Management Studio

Hope you can help. Thanks

Answer 1

change your code like below:

UPDATE table SET  LANGUAGE = (Select LANGUAGE from table where ITEM_CODE = 87654321) 
                  LABEL    = (Select LABEL from table where ITEM_CODE = 87654321)
WHERE ITEM_CODE = 12345678

it will work for your example, also you can rewrite it in other syntax and ways.....

if you are a different goal, please explain it more.

good luck