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‘abc’ || ‘xyz’, when PIPES_AS_CONCAT is enabled, results in ____________

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‘abc’ || ‘xyz’, when PIPES_AS_CONCAT is enabled, results in ____________

(a) 0

(b) 1

(c) abcxyz

(d) xyzabc

I got this question in an online quiz.

This intriguing question comes from Expression Evaluation and Type Conversion in section Data Types of MySQL

1 Answer

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Best answer
Right option is (c) abcxyz

To explain I would say: If the SQL mode PIPES_AS_CONCAT has been enabled, the SQL standard ‘||’ operation for string concatenation becomes valid in MySQL. Both operands are concatenated to give ‘abcxyz’.

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