1=1 or (1=0 and 0=1) (case 3) : AND OR « Query Select « Oracle PL/SQL Tutorial






  1. Oracle PL/SQL Tutorial
  2. Query Select
  3. AND OR
SQL> select 'is true  ' as condition
  2  from   dual
  3  where  1=1 or (1=0 and 0=1);








2.11.AND OR
2.11.1.Use AND to link two conditions
2.11.2.Use 'OR' to link two conditions
2.11.3.Combine three conditions with OR
2.11.4.(state = 'CA') OR (state <> 'CA')
2.11.5.1=1 or 1=0 and 0=1 (case 1)
2.11.6.(1=1 or 1=0) and 0=1 (case 2)
2.11.7.1=1 or (1=0 and 0=1) (case 3)
2.11.8.CONDITION
2.11.9.Combine NOT and AND
2.11.10.Not Equal and OR
2.11.11.Replace IN operator with or operator
2.11.12.Combine conditions with AND and OR
2.11.13.Use parenthesis to change the order of AND and OR