Oracle-1: One-Line Function

one-line function

    1. Character function:

          1.1 Case control control function:

                 

         1.2 Character control function:

                

  2 Numeric functions:

                

 3 date functions:

                

    3.1 The TO_CHAR function converts the date:

               

                 

    3.2TO_CHAR function converts numbers:

               

              

    4. General function:

            

   5. Conditional expression:

           

    DECODE expression