SQL Database Concepts Question: Download Questions PDF
Explain difference between cross join and Full outer join?
Answer:
Cross Join :
No join conditions are specified.
Results in pairs of rows.
Results in Cartesian product of two tables.
Full Outer Join:
A combination of both left and right outer joins.
Results in every row from both of the tables , at least once.
Assigns NULL for unmatched fields.
No join conditions are specified.
Results in pairs of rows.
Results in Cartesian product of two tables.
Full Outer Join:
A combination of both left and right outer joins.
Results in every row from both of the tables , at least once.
Assigns NULL for unmatched fields.
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