Handling conditions : IF « PL SQL Statements « Oracle PL/SQL Tutorial






  1. Oracle PL/SQL Tutorial
  2. PL SQL Statements
  3. IF

Conditions can be connected by using logical operations: AND, OR, and NOT.

The default order of evaluation is standard.

First any parentheses are resolved.

Then operators are executed on the same level in order of precedence: NOT (highest precedence), AND, and OR (lowest precedence).

SQL> declare
  2      v_day NUMBER := TO_CHAR(TO_DATE('20060101','YYYYMMDD'),'D');
  3  begin
  4      if v_day in (1,7) or (v_day not in (1,7) and (v_day between 0 and 6 or v_day between 19 and 23))
  5      then
  6          DBMS_OUTPUT.put_line(v_day||': Off-peak');
  7      else
  8          DBMS_OUTPUT.put_line(v_day||': Peak');
  9      end if;
 10  end;
 11  /
1: Off-peak

PL/SQL procedure successfully completed.

SQL>








22.1.IF
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