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	{{Built-in\|Key\|⌸}} is a [[primitive operator\|primitive]] [[monadic operator]] which takes a [[dyadic function]] [[operand]] where specified keys group the indices or major cells of an argument. It was introduced in [[Dyalog APL]] version 14.0 and is commonly compared to SQL's "GROUP BY~~" clause~~.		{{Built-in\|Key\|⌸}} is a [[primitive operator\|primitive]] [[monadic operator]] which takes a [[dyadic function]] [[operand]] where specified keys group the indices or major cells of an argument. It was introduced in [[Dyalog APL]] version 14.0 and is commonly compared to SQL's [[wikipedia:Group by (SQL)\|GROUP BY]] statement.

	== Description ==		== Description ==