Expression (expr)

The syntax for the expression (expr) in BNF is as follows:

Syntax

expr ::=
 [{table_name.| alias.}]column_name
   |character_literal
   |numeric_literal
   |date-time_literal
   |aggregate_function
   |scalar_function
   |numeric_arith_expr
   |date_arith_expr
   |conditional_expr
   |  (expr)