Comparison Operator Syntax | Teradata Vantage - Comparison Operator Syntax - Analytics Database - Teradata Vantage

{ expression_1 operator expression_2 |
  expression_1 operator quantifier ( literal [,...] ) |
  expression_1 operator [ quantifier ] ( subquery ) |
  ( expression_1 [,...] ) operator [ quantifier ] ( subquery )
}

Syntax Elements

expression_1

An SQL scalar expression, including derived period expressions.

Comparison operators do not support BLOB or CLOB type expressions. You can explicitly cast BLOBs to BYTE or VARBYTE and cast CLOBs to CHARACTER or VARCHAR, and use the result with comparison operators.

An expression that results in a UDT data type can only be compared with another expression that results in the same UDT data type.

operator

A comparison operator—see Supported Comparison Operators.

expression_2

An SQL scalar expression, including derived period expressions.

quantifier

One of the following quantifier keywords:

• ANY
• SOME
• ALL

literal

Any of the following:

• Defined value
• Macro parameter
• Built-in value such as TIME, DATE, or USER

The comparison operation may compare an expression against a list of explicit literals.

The data types of expression and literal must be compatible. If the data types of the operands differ, Vantage performs an implicit conversion from one type to another in some cases.

subquery

An SQL SELECT statement.

Using a subquery in a condition is restricted in certain cases.