Creating a Dynamic YoY Date Range in Case Statement for Current Quarter QTD - response (1) by dnoeth

You can apply TRUNC & TO_CHAR like this:

CASE
   WHEN date between TRUNC(CURRENT_DATE-1, 'Q') AND CURRENT_DATE-1 
   THEN TO_CHAR(CURRENT_DATE-1, '"Q"Q"_"yyyy')
   WHEN date between TRUNC(ADD_MONTHS(CURRENT_DATE-1,-12), 'Q') AND ADD_MONTHS(CURRENT_DATE-1,-12) 
   THEN TO_CHAR(ADD_MONTHS(CURRENT_DATE-1,-12), '"Q"Q"_"yyyy')
END