But he said the combination of PartNo and SerialNo makes a record unique.

>May be if we only have Sequence =1 for the particular PartNo, the record is considered unique.
>
>>I don't get where Sequence comes into play here.
>>
>>>

>>>PartId     PartNo  SerialNo     Sequence
>>>1          AS345   ANB-121             1
>>>2          AS345   ANB-122             2
>>>3          AS345   ANB-123             3
>>>4          AS345   ANB-124             4
>>>5          A34SF   1212544             1
>>>6          B21AC   ANB-A1              1
>>>7          B21AC   ANB-A2              2
>>>8          ANG34   ANG34               1
>>>

>>>
>>>From the above set the query should return rows 5 and 8 because those partnumber/serialno combinations only appear once.
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>>>I have a table of part information. The combination of PartNo and SerialNo make the row unique. There is a Sequence column.
>>>>>I want to get back all records where there is only one record for PartNo/SerialNo combination. I'm not sure what the syntax
>>>>>for this query is. Can someone help?
>>>>
>>>>Not sure what you want, could you please post some data and desired result from it?