SELECT transaction_type_description FROM Ref_Transaction_Types WHERE transaction_type_code	  =  "PUR"
Show the description of transaction type with code "PUR".
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 = value
Show the description of transaction type with code `` PUR '' .