SELECT transaction_type_description FROM Ref_Transaction_Types WHERE transaction_type_code	  =  "PUR"
SELECT transaction_type_description FROM Ref_Transaction_Types WHERE transaction_type_code	  =  "PUR" <table_name> : Ref_Transaction_Types col : transaction_type_code | transaction_type_description row 1 : SALE | Sale row 2 : PUR | Purchase
col : transaction_type_description row 1 : Purchase