sql 2005 - The column was specified multiple times

Question

The problem, as mentioned, is that you are selecting PEID from two tables, the solution is to specify which PEID do you want, for example

 SELECT tb.*
    FROM (
        SELECT tb1.PEID,tb2.col1,tb2.col2,tb3.col3 --, and so on
        FROM vCodesWithPEs as tb1 INNER JOIN vDeriveAvailabilityFromPE as tb2
        ON tb1.PROD_PERM = tb2.PEID 
        INNER JOIN PE_PDP tb3 ON tb1.PROD_PERM = tb3.PEID
    ) AS tb;

That aside, as Chris Lively cleverly points out in a comment the outer SELECT is totally superfluous. The following is totally equivalent to the first.

        SELECT tb1.PEID,tb2.col1,tb2.col2,tb3.col3 --, and so on
        FROM vCodesWithPEs as tb1 INNER JOIN vDeriveAvailabilityFromPE as tb2
        ON tb1.PROD_PERM = tb2.PEID 
        INNER JOIN PE_PDP tb3 ON tb1.PROD_PERM = tb3.PEID

or even

        SELECT * 
        FROM vCodesWithPEs as tb1 INNER JOIN vDeriveAvailabilityFromPE as tb2
        ON tb1.PROD_PERM = tb2.PEID 
        INNER JOIN PE_PDP tb3 ON tb1.PROD_PERM = tb3.PEID

but please avoid using SELECT * whenever possible. It may work while you are doing interactive queries to save typing, but in production code never use it.

Looks like you have the column PEID in both tables: vDeriveAvailabilityFromPE and PE_PDP. The SELECT statement tries to select both, and gives an error about duplicate column name.

You're joining three tables, and looking at all columns in the output (*).

It looks like the tables have a common column name PEID, which you're going to have to alias as something else.

Solution: don't use * in the subquery, but explicitly select each column you wish to see, aliasing any column name that appears more than once.

Instead of using * to identify collecting all of the fields, rewrite your query to explicitly name the columns you want. That way there will be no confusion.