The result is impossible for the query and data you posted.
Most likely there're multiple records with PK=230 in one of tables or both.

>
>I am having a tough time understanding why the following query returns 6 rows for the PK_FLD = 230? Here are the two tables:
>
>Table A
>PK_FLD ID_NAME
>230 ABC
>510 ABC
>511 ABC
>512 ABC
>
>TableB
>PK_FLD
>230
>510
>512
>511
>722
>
>

>select TABLEA.PK_FLD FROM TABLEA JOIN TABLEB ON TABLEA.PK_FLD = TABLEB.PK_FLD
>WHERE TABLEA.ID_NUMBER = "ABC"
>

>
>I thought that the resulting query should have 4 rows but what is returned is:
>230
>230
>230
>230
>230
>230
>510
>511
>512
>
>Could someone explain why? TIA