16.10 - Operators - Teradata Database

Teradata Database SQL Fundamentals

Teradata Database
Release Number
June 2017
English (United States)
Last Update

SQL operators express logical and arithmetic operations. Operators of the same precedence are evaluated from left to right.

Parentheses can be used to control the order of precedence. When parentheses are present, operations are performed from the innermost set of parentheses outward.

The following definitions apply to SQL operators.

Term Definition
numeric Any literal, data reference, or expression having a numeric value.
string Any character string or string expression.
logical A Boolean expression (resolves to TRUE, FALSE, or unknown).
value Any numeric, character, or byte data item.
set A collection of values returned by a subquery, or a list of values separated by commas and enclosed by parentheses.

SQL Operations and Precedence

SQL operations, and the order in which they are performed when no parentheses are present, appear in the following table. Operators of the same precedence are evaluated from left to right.

Precedence Result Type Operation
highest numeric + numeric   (unary plus)

- numeric    (unary minus)

intermediate numeric numeric ** numeric     (exponentiation)
numeric numeric * numeric     (multiplication)

numeric / numeric     (division)

numeric MOD numeric     (modulo operator)

numeric numeric + numeric    (addition)

numeric - numeric    (subtraction)

string concatenation operator
logical value EQ value

value NE value

value GT value

value LE value

value LT value

value GE value

value IN set

value NOT IN set

value BETWEEN value AND value

character value LIKE character value

logical NOT logical
logical logical AND logical
lowest logical logical OR logical