<prompt> Kutokana na meza ya bei ya hisa kila siku na nguzo StockID, Tarehe, na Bei, kuandika SQL query kupata hisa ambazo bei imeongezeka kwa angalau 20 katika mwezi uliopita.  <response>: Heres a possible SQL query:SELECT DISTINCT StockIDFROM StockPrices currentWHERE EXISTS SELECT 1 FROM StockPrices past WHERE past.StockID current.StockID AND past.Date DATEADDmonth, -1, current.Date AND past.Date current.Date AND current.Price past.Price 1.2This query uses a correlated subquery to test for the existence of a matching row in the past month whose price is at most 80 of the current rows price which is equivalent to a 20 increase. The DISTINCT keyword removes duplicates in case there are multiple such rows for a given stock. The DATEADD function is used to calculate the date one month before the current date. Note that the query assumes that the Date column is of a date or datetime data type. 