A UNION query is which of the following?(a) Combines the output from no more than two queries and must include the same number of columns(b) Combines the output from no more than two queries and does not include the same number of columns(c) Combines the output from multiple queries and must include the same number of columns(d) Combines the output from multiple queries and does not include the same number of columnsThe question was posed to me in semester exam.This interesting question is from Joins topic in division Laying the Foundation of SQL Server

A UNION query is which of the following?(a) Combines the output from n

1.	A UNION query is which of the following?(a) Combines the output from no more than two queries and must include the same number of columns(b) Combines the output from no more than two queries and does not include the same number of columns(c) Combines the output from multiple queries and must include the same number of columns(d) Combines the output from multiple queries and does not include the same number of columnsThe question was posed to me in semester exam.This interesting question is from Joins topic in division Laying the Foundation of SQL Server
Answer» CORRECT choice is (c) COMBINES the output from multiple QUERIES and must include the same number of columns Easiest explanation: A single UNION can COMBINE only 2 sql query at a time.

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