DECODE « Conversion Functions « Oracle PL/SQL Tutorial

15.2.1.Using the DECODE() Function
15.2.2.SELECT DECODE(1, 2, 1, 3)
15.2.3.Use Decode in table column
15.2.4.Pass multiple search and result parameters to DECODE()
15.2.5.The null may be made more explicit with a DECODE statement
15.2.6.Decode as If statement
15.2.7.Demo range comparison with DECODE
15.2.8.DECODE in the GROUP BY clause
15.2.9.Use decode create dynamic select statement

15.2.10.Use decode as if statement and output 'high' or 'low'
15.2.11.decode column data to output more meaningful information