if we take 2 tables(like emp and dept), we use join stage and how to improv

if we create a file, in that 10 rows(means 1,2,....9,10
like). i want 7 row exactly, which command use in unix?
plz send this question.

Question Posted / prasad

Answer Posted / prasad

if we take 2 tables(like emp and dept), we use join stage and how to improve the performance?

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