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Question:An outer join is used when:



a.        The tables being joined have NOT NULL columns
b.        The tables being joined have only matched data.
c.        The columns being joined have NULL values
d.        The tables being joined have only unmatched data
e.        The tables being joined have both matched and unmatched data
  


asked Sep 13, 2013 in MYSQL by anonymous
edited Sep 12, 2013
0 votes
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