关键字数 =
VAR KeyWord = "jpg"
VAR TextLine = [内容]
-- 执行：
VAR KeyWordLen = LEN( KeyWord )
VAR Positions = GENERATESERIES( 1 , LEN( TextLine ) , 1 )
VAR Result = ADDCOLUMNS( Positions , "IsFound" , MID( TextLine , [Value] , KeyWordLen ) = KeyWord )
RETURN COUNTROWS( FILTER( Result , [IsFound] ) )
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