Union -vs- Join
in SQL / UNION vs UNION ALL
The difference Between UNION and JOIN is
column 1 + colunm2
= 2 columns
column 1 + column 2
= 1 column of the 2 columns' values
1 answers ( 0 marked as helpful)
Thanks for reaching out.
There is a major difference between
UNION/UNION ALL in SQL. Using the
JOIN clause, we combine the attributes of two given relations and, as a result, form tuples. Whereas we use the
UNION clause when we want to combine the results obtained from two queries. They both combine data differently.
Hope this helps.
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Is this hard core rule that left and right join are perfectly one to many relationship???