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Updating a value in a column

Posted on 2013-06-10
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Last Modified: 2013-06-10
I have an update query which I would like to run to update a value in a column for a particular set of records using the corresponding values from another table.

Currently in the "Update To" section of the update query (see attached), I am updating the value in the column, "Letter" with the corresponding value in the NSCPP_Students_Temp table. However, I would like to add an "N" before the value from the other table. So for instance, if the  NSCPP_Students_Temp table record has the value "C",  then I would like the value "NC" written to the column of NSCPP_Students. I tried using concatentation, i.e. "N" & [NSCPP_Students_Temp].Letter but it isn't working, i.e., it still writes the letter without the "N" in front.
Update-Query-No-Shows.jpg
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Question by:geeta_m9
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7 Comments
 
LVL 85
ID: 39235684
Can you switch to SQL view and show the full value of the SQL statement?
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Accepted Solution

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Dale Fye earned 1600 total points
ID: 39235685
What does "isn't working" mean?  Normal syntax would be something like

Update yourTable
INNER JOIN yourOtherTable
ON yourTable.ID = yourOtherTable.ID
SET yourTable.[Letter] = "N" & yourOtherTable.[Letter]

However, depending on your primary keys, this may actually not be an updateable query.

Try writing it as a SELECT query:

SELECT yourTable.Letter, yourOtherTable.Letter as Letter2, "N" & yourOtherTable.Letter as Letter3
FROM yourTable
INNER JOIN yourOtherTable
ON yourTable.ID = yourOtherTable.ID

Does this query display the correct information?  Is it updateable?  Can you change a value in yourTable.Letter column from this SELECT query?
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Author Comment

by:geeta_m9
ID: 39235700
Here is the SQL:

UPDATE [NSCPP Students] INNER JOIN NSCPP_Students_Temp ON [NSCPP Students].PID = NSCPP_Students_Temp.PID SET [NSCPP Students].Letter = "N" & [NSCPP_Students_Temp].[Letter];
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LVL 49

Expert Comment

by:Dale Fye
ID: 39235724
And that is not working?

Did you try the SELECT statement?  Is the query updateable when you do it as a SELECT?

Is PID the primary key in table [NSCPP Students]?

Is your data in Access or linked from some other relational database?
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Author Comment

by:geeta_m9
ID: 39235745
If found out the error did not lie with the query but by my "Temp" table not having any records in it to begin with because the data wasn't being imported into the correct table. I should checked the code.

I fixed the problem and it is now working.

I appreciate your help and I am sorry for wasting your time.
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LVL 49

Expert Comment

by:Dale Fye
ID: 39235768
Trust me, we have all made that mistake at least once.

You solved your own problem, I don't have a problem with you withdrawing the points you awarded me.  Just click the "Request Attention" hyperlink on your original post and indicate you would like to reallocate points.

Dale
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Author Comment

by:geeta_m9
ID: 39235776
That's ok. Your suggestions helped point me in the right direction.
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