Hows it going everyone. Im trying to compare two tables, and display the rows that are not in both tables in a DataGrid. Im using Visual Basic 2008, and created a query in the TableAdapterManager, but when I try to call the query, it is not displaying the results. Shows an error to lessen constraints, but I disabled constraints. I would really appreciate any tips, Im still pretty new to VB. Heres what I have in the query.

SELECT     Table1.Path, Table1.Filename, Table1.Type, Table1.[key], Table2.Path AS Expr1, Table2.Filename AS Expr2, Table2.Type AS Expr3
FROM         Table1, Table2
WHERE     (Table1.Path <> Table2.Path) OR
                      (Table1.Filename <> Table2.Filename)

Do you want to
1) step throgh all rows of Table1, and show the row when there is no row with the same path AND filename in Table 2
2) and then do the same vice versa?

If yes, and DBMS is MS SQL Server or Oracle I would use a union:

/* paste this in MS Query Analyzer, use || instead of + for oracle */
DROP TABLE t1
DROP TABLE t2
CREATE TABLE t1(
sPath VARCHAR(20),
sFilename VARCHAR(10)
)
CREATE TABLE t2(
sPath VARCHAR(20),
sFilename VARCHAR(10)
)
INSERT INTO t1 VALUES ( 'P1', 'F1' )
INSERT INTO t1 VALUES ( 'P2', 'F2' )
INSERT INTO t2 VALUES ( 'P1', 'F1' )
INSERT INTO t2 VALUES ( 'P3', 'F3' )

SELECT sPath + sFilename FROM t1 WHERE spath + sfilename NOT IN 
   (SELECT spath + sfilename FROM t2) 
UNION ALL
SELECT sPath + sFilename FROM t2 WHERE spath + sfilename NOT IN 
   (SELECT spath + sfilename FROM t1)


------------------------------ 
P2F2
P3F3
(2 rows affected)

Thanks a lot, that got it working for me. Just created the table with the query, databind, and there it was. Thanks again

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