for example, suppose that in a database test1, a table is called test2, field name A _ Magi B _ ~ C _ D _ D ~ E, and the value is 0 or 1.
then how to query the names of fields with a value of 1 in each row of data?
for example, suppose that in a database test1, a table is called test2, field name A _ Magi B _ ~ C _ D _ D ~ E, and the value is 0 or 1.
then how to query the names of fields with a value of 1 in each row of data?
SELECT id, CONCAT(
CASE WHEN A=1 THEN 'A ' ELSE '' END,
CASE WHEN B=1 THEN 'B ' ELSE '' END,
CASE WHEN C=1 THEN 'C ' ELSE '' END,
CASE WHEN D=1 THEN 'D ' ELSE '' END,
CASE WHEN E=1 THEN 'E ' ELSE '' END)
FROM test2
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