What are various joins used while writing SUBQUERIES?

What are various joins used while writing SUBQUERIES?
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1 Answer

Answer :

Self join-Its a join foreign key of a table references the same table.
Outer Join--Its a join condition used where One can query all the rows
of one of the tables in the join condition even though they don't satisfy
the join condition.
Equi-join--Its a join condition that retrieves rows from one or more
tables in which one or more columns in one table are equal to one or
more columns in the second table.
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