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Answer Posted / anu
A shortcut join is a join that provides alternate path
between two tables.Shortcut joins improve the performance
of a query by not taking into account intermediate tables,
and so shortening a normally longer join.
A common use of shortcut joins is to link a shared lookup
table to another table further along a join path. The join
path comprises several different tables in the same
context. In such a case, the shortcut join is only
effective when the value being looked up has been
denormalized to lower levels in a hierarchy of tables, so
the same value exists at all the levels being joined.
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