[SYMBOL] [A] [B] [C] [D] [E] [F] [G] [H] [I] [J] [K] [L] [M] [N] [O] [P] [R] [S] [T] [U] [V] [W] [Y] != (inequality) operator  % pattern-matching character  > (greater than) operator      self non-equi-joins  >= (greater than or equal to) operator  < (less than) operator      self non-equi-joins  <= (less than or equal to) operator  ( ) (parentheses)     condition/operator precedence      subqueries  (+) outer join operator  (+) outer join operator, self outer joins  - (subtraction) operator     dates  = (equality) operator  _ (underscore) pattern-matching character