There is no concrete answer for this but it depends and quite complex. Generally, joining tables needs more work than independent table which means more cost. Also it depends on the number of records in driving and driven table, how the data is distributed in these tables, fragmentations, purity of statistics etc..
Is INNER JOIN costly ?? Just curious to know
There is no concrete answer for this but it depends and quite complex. Generally, joining tables needs more work than independent table which means more cost. Also it depends on the number of records in driving and driven table, how the data is distributed in these tables, fragmentations, purity of statistics etc..