This Week vs Last Week

Hello

I have SalesData coming from VBAK. I have SalesDocument Date which I joined with M_TIME_DIMENSION - DATE_SAP.

I can get the CALWEEK, CALMONTH, YEAR now. But below are my questions.

1. How to get "Lastweek" from any Date?

2.Create a report with Last Week Sales.

3. Compare This Year Last week with Last Year Last week.

The report should dynamically run. ( a User Prompt or a Input Variable would also be helpful)

I looked into below links but not sure it answers my questions.

https://help.sap.com/saphelp_hanaplatform/helpdata/en/20/e23edc7519101482eae3271722de36/content.htm?frameset=/en/20/f5bb79751910148e7198206fbd199f/frameset.htm&current_toc=/en/2e/1ef8b4f4554739959886e55d4c127b/plain.htm&node_id=111

Implementation of WTD, MTD, YTD in HANA using Input Parameters Derived from Table

Implementation of WTD, MTD, YTD in HANA using Script based Calc View calling Graphical Calc view

Re: Filter by date variable

Get Date Dimension – Quarter start date, Quarter end date, Week Start Date, Month Start Date, Month End Date, Week End Date, Current Quarter start date, Start date of previous quarter and End date of previous quarter