DECODE function

DECODE is equivalent to a map function in sql, which will create a new column to display the value

SELECT T1.*,

       T2.WAREKIND_NAME,

       DECODE(T1.CURRENCY_TYPE, 'A', '111', 'B', '222') CURRENCY_NAME

  FROM TB_CUS_TRADE_WARE T1, TB_BAS_BED_SRT T2

 WHERE T1.WAREKIND_KEY = T2.WAREKIND_KEY AND

       /*T1.CUS_USER_KEY = :CUS_USER_KEY AND*/

       T1.CURRENCY_TYPE = 'A'

 ORDER BY T2.ORDER_NUM ASC