Conditions

There are conditional commands for MySQL too.

IF/ELSE

SELECT 
    FieldA as A,
    FieldB as B,
    IF(FieldA = FieldB, 'equal', 'not equal') as condition,
FROM
    table
WHERE
    this LIKE that

Or cascaded:

SELECT 
    FieldA as A,
    FieldB as B,
    IF(FieldA = FieldB,'FieldA is equal to FieldB',IF(FieldC = FieldD,'FieldC is equal to FieldD','all false')) as output,
FROM
    table
WHERE
    this LIKE that

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