How to update multiple rows in a temp table with multiple values from another table using only one ID common between them?

问题

I am trying to reconcile the IDs in a temp table (top) from another DB table (bottom). Since I only have one ID that's common between the two, I am only getting the top result for all the rows (ReconGlobalRemunerationGrantID) in my temp table. I am aiming to get each of the unique ID and update my temp table as such.

Right now, my update query is simple and I update using the ID common between the 2 tables. Is there a function or another command statement I can use to get the result intended?

update tgrg set ReconGlobalRemunerationGrantID = grg.GlobalRemunerationGrantID from @GlobalRemunerationGrant tgrg
join @GlobalRemuneration tgr on tgr.GlobalRemunerationID = tgrg.GlobalRemunerationID
join DataCore..GlobalRemuneration gr on gr.CompanyID = @CompanyID and gr.FiscalYearID = tgr.FiscalYearID and gr.DirectorDetailID = tgr.DirectorDetailID and tgr.GlobalRoleIDCODE = gr.GlobalRoleID
join DataCore..GlobalRemunerationGrant grg on gr.GlobalRemunerationID = grg.GlobalRemunerationID

Thank you.

回答1:

Based on the comment - you have 2 values to match on, not just one? e.g., both GlobalRemunerationID and GlobalRemunerationGrantID?

Here's an example using tables 'temptable' and 't1'

UPDATE temptable
SET    ReconGlobalRemunerationGrantID = t1.GlobalRemunerationGrantID
FROM   temptable
       INNER JOIN t1 ON temptable.GlobalRemunerationID = t1.GlobalRemunerationID
                    AND temptable.GlobalRemunerationGrantID = t1.GlobalRemunerationGrantID

Update below

The below version takes the two data sets

Partitions them by GlobalRemunerationID and orders them by ReconGlobalRemunerationGrantID to get the 'row numbers' (rn)
Joins them on GlobalRemunerationID and rn to get them in order

Key code is below (with slightly different tables than your full set sorry - matches the data set you gave though).


; WITH tgrg AS
        (SELECT  GlobalRemunerationID, ReconGlobalRemunerationGrantID, 
                 ROW_NUMBER() OVER (PARTITION BY GlobalRemunerationID ORDER BY GlobalRemunerationGrantID) AS rn
            FROM #GlobalRemunerationGrant
        )
    UPDATE  tgrg 
    SET     ReconGlobalRemunerationGrantID = tgr.GlobalRemunerationGrantID 
    FROM    tgrg
            INNER JOIN 
               (SELECT   GlobalRemunerationID, GlobalRemunerationGrantID, 
                         ROW_NUMBER() OVER (PARTITION BY GlobalRemunerationID ORDER BY GlobalRemunerationGrantID) AS rn
                    FROM GlobalRemuneration
                ) AS tgr ON tgrg.GlobalRemunerationID = tgr.GlobalRemunerationID AND tgrg.rn = tgr.rn

A db<>fiddle with the full set is there - note that I changed some of the IDs to demonstrate that it wasn;t using them to match.

来源：https://stackoverflow.com/questions/64096930/how-to-update-multiple-rows-in-a-temp-table-with-multiple-values-from-another-ta

标签

sql-server

tsql

sql-update

temp-tables