A Simple Condition Statement with BOOLEAN variable : IF « PL SQL Statements « Oracle PL/SQL Tutorial

SQL> create or replace function f_isSunday (in_dt DATE)
  2  return VARCHAR2
  3  is
  4      v_out VARCHAR2(10);
  5      v_flag_b BOOLEAN;
  6  begin
  7      v_flag_b := to_char(in_dt,'d')=1;
  8      if v_flag_b then
  9          v_out:='Y';
 10          DBMS_OUTPUT.put_line('IsSunday=Y');
 11      end if;
 12      return v_out;
 13  end;
 14  /

Function created.

22.1.1.Conditional Logic
22.1.2.Handling conditions
22.1.3.A Simple Condition Statement
22.1.4.A Simple Condition Statement with BOOLEAN variable
22.1.5.The IF...THEN...ELSE Statement
22.1.6.Use IF THEN ELSE IF
22.1.7.IF...ELSE statements
22.1.8.Using an ELSIF Statement
22.1.9.IF..ELSIF ladder
22.1.10.Block IF statement
22.1.11.IF with ELSE
22.1.12.The Syntax for IF...ELSIF
22.1.13.ELSIF Ladder
22.1.14.The Syntax for Nested IF Statements
22.1.15.Use if with 'IN'
22.1.16.Three valued comparison
22.1.17.JUMP out of a IF statement with goto
22.1.18.Comparing with NULL
22.1.19.If block statement
22.1.20.Create a function and call it in an if statement
22.1.21.PLW-06002: Unreachable code