SELECT on a MERGE table is like _____________(a) UNION ALL(b) UNION(c) UNION DISTINCT(d) JOINThis question was addressed to me in an online interview.I need to ask this question from Performing Multiple in chapter Using SQL to Manage Data of MySQL

SELECT on a MERGE table is like _____________(a) UNION ALL(b) UNION(c)

1.	SELECT on a MERGE table is like _____________(a) UNION ALL(b) UNION(c) UNION DISTINCT(d) JOINThis question was addressed to me in an online interview.I need to ask this question from Performing Multiple in chapter Using SQL to Manage Data of MySQL
Answer» The correct ANSWER is (a) UNION ALL Easiest explanation: PERFORMING a ‘SELECT’ operation on a ‘MERGE’ table is LIKE performing ‘UNION ALL’. This means that duplicate row results are not REMOVED. ‘SELECT DISTINCT’ is like ‘UNION’ or ‘UNION DISTINCT’.

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SELECT on a MERGE table is like _____________(a) UNION ALL(b) UNION(c) UNION DISTINCT(d) JOINThis question was addressed to me in an online interview.I need to ask this question from Performing Multiple in chapter Using SQL to Manage Data of MySQL

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