[表格] CASE（简单）

<cell> Conditional <cell> CASE (Simple) <cell> Compares input_expression to expression_to_match of each successive WHEN clause and returns the first result where this comparison returns true. [Learn more](/looker/docs/studio/case-simple) `

CASE input_expression
    WHEN expression_to_match THEN result
    [WHEN expression_to_match THEN result]
    [...]
    [ELSE result]
END

`