@searchlog =
    EXTRACT UserId          int,
            Start           DateTime,
            Region          string,
            Query           string,
            Duration        int?,
            Urls            string,
            ClickedUrls     string
    FROM "/Samples/Data/SearchLog.tsv"
    USING Extractors.Tsv();

@rs1 =
    SELECT Start, Region, Duration
    FROM @searchlog
WHERE Region == "en-gb";

OUTPUT @rs1   
    TO "/output/My-SearchLog-transform-rowsets.csv"
    USING Outputters.Csv();