MySQL : Mysql ERROR 1241 (21000): Operand should contain 1 column(s)

MySQL : Mysql ERROR 1241 (21000): Operand should contain 1 column(s)
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MySQL : Mysql ERROR 1241 (21000): Operand should contain 1 column(s)
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column(s) contain : Operand MySQL (21000): 1241 1 Mysql ERROR should