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MySQL Type Conversion in Expression Evaluation

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  1. If the PIPES_AS_CONCAT is disabled, ‘abc’ || ‘xyz’ results in ____________.
    1. -1
    2. 1
    3. 0
    4. error
    5. None of these
Correct Option: C

When the SQL mode PIPES_AS_CONCAT is disabled, the SQL standard ‘||’ operation for string concatenation is not valid in MySQL. Both operands are converted to zero. So the result is zero.


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