SQL Inner Join Returns WAY More Rows Than Expected -

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the following query returns >7000 rows when each table has 340 rows.

select config.spec, temptable.spec confg inner join temptable on config.spec = temptable.spec

why happen? if inner join returns row if there match in both tables why return multiple rows match.

if there more 1 row same spec value in temptable same spec value in confg, duplicate rows, , vice versa.


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