single input variable and return for that month and previous 6 months values

Hi  all,

1. is there any method like in bex offsets.

please let me know when i providing value for the month and it should return that month and previous 6 months values.

2. is there any way that we create global variable. i have created 7 queries and i have created 7 month variables. these queries are sources for BO dashboard.

when i run the dashboard it is displaying 7 month variables.

if we create global variable in hana and use this variable in all the queries.that will display single variable in BO dashboard.

please help