Problem in implementing Period over Period Analysis

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1

Hi team,

I am quite new to Looker so every input is valuable for me.

I am trying to implement period over period analysis. I am following this article https://help.looker.com/hc/en-us/articles/360050104194-Methods-for-Period-Over-Period-PoP-Analysis-in-Looker

I have chosen simple way to start with “Any Two Native Timeframes”. I am assuming this is the easiest one.

As per article I have created dimension

    dimension: wtd_only {        group_label: "To-Date Filters"        label: "WTD"        view_label: "_PoP"        type: yesno        sql:  (EXTRACT(DOW FROM ${created_raw}) < EXTRACT(DOW FROM GETDATE())                OR            (EXTRACT(DOW FROM ${created_raw}) = EXTRACT(DOW FROM GETDATE()) AND            EXTRACT(HOUR FROM ${created_raw}) < EXTRACT(HOUR FROM GETDATE()))                OR            (EXTRACT(DOW FROM ${created_raw}) = EXTRACT(DOW FROM GETDATE()) AND            EXTRACT(HOUR FROM ${created_raw}) <= EXTRACT(HOUR FROM GETDATE()) AND            EXTRACT(MINUTE FROM ${created_raw}) < EXTRACT(MINUTE FROM GETDATE())))  ;;    }

and when I execute it, it returns error Query execution failed: - A valid date part name is required but found DOW at [4:28

I tried to fix it and replaced DOW by day_of_week but no luck

This is what I am trying to run:

Please help me to undertstand what I am missing?

Thanks in advance

Rohit

2

Hi there, I think “DOW” needs to be replaced with DAYOFWEEK. Give it a shot and let me know if it doesn’t work.

3

Hi Rking,

How I have created the date field:

    dimension_group: created {        type: time        view_label: "_PoP"        timeframes: [        raw,        time,        hour_of_day,        date,        day_of_week,        day_of_week_index,        day_of_month,        day_of_year,        week,        week_of_year,        month,        month_name,        month_num,        quarter,        year        ]        sql: ${TABLE}.created_at ;;        convert_tz: no    }

When I go to explorer and select filter on month field and run it:

It throws error:

I know why error is coming, _PoP Created Month has values in YYYY-MM and filter has value 3 in intiger but I am not sure why _PoP Created Month returning such value which can’t match with intiger 3 in filter?

Can you please tell me how to reformat the values in _PoP Created Month?

4

Hi Rohit,

Try adding one more line of code for datatype: date. I sometimes get errors using dates as filters and that usually fixes it.

dimension_group: created {
type: time
view_label: “_PoP”
timeframes: [
raw,
time,
hour_of_day,
date,
day_of_week,
day_of_week_index,
day_of_month,
month,
month_name,
month_num,
quarter,
year]
sql: ${TABLE}.created_at ;;
convert_tz: no
datatype: date
}

5

datatype: date sorts out this problem but the objective is to find out month over month percentage. This solution creates a chart with two lines. I need one line with this month sales/previous month sales floating over day of month.

This is how my explorer looks like:

Can you please help me to achieve it?