SELECT (SELECT fare_amount
WHERE (class_code = 'ECO')) AS Economy,
FROM fare_tab AS f2
WHERE (class_code = 'TOU')) AS Tourist
FROM fare_tab AS f1 I always received an error of: Subquery returned more than 1 value. This is not permitted when the
subquery follows =, !=, <, <= , >, >= or when the subquery
is used as an expression. How can I solve this?
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