[mysql] MySQL error 1241: Operand should contain 1 column(s)

Just remove the ( and the ) on your SELECT statement:

insert into table2 (Name, Subject, student_id, result)
select Name, Subject, student_id, result
from table1;

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MySQL error 1241: Operand should contain 1 column(s) MySQL - Operand should contain 1 column(s)