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A column reference represents the value of a column in a table. It may be either a column name or a column name qualified with a table name. If no table name is specified, the table to which the column belongs is implicit. In this case, the column name must be uniquely be determinable in the most local scope.

Syntax Syntax

  1. <value expression> ::= <column reference> 
                                  | <literal> 
                                  | <set function> 
                                  | <arithmetic expression>.
End of the code.
Example

Example Example

  1. <value expression> ::= <column reference> 
                                  | <literal> 
                                  | <set function> 
                                  | <arithmetic expression>.
End of the code.

Column References. Here employee_name is a column name andepmloyees.epmloyee_id is a qualified column name.

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