Redshift Comparison Operators - ALL, SOME, ANY Alternative

The relational database such as Teradata support SQL comparison operators, including ALL, ANY and SOME. Some databases refer ALL, ANY and SOME as a SQL logical operator. A logical operators is an operator applied to the result of a predicate to determine the result of a search condition. Amazon Redshift does not support ALL, ANY and SOME logical operators. In this article, we will check what are ALL, SOME, ANY comparison operators alternatives in Redshift.

SQL Logical Operators ALL, SOME and ANY

Before jumping into details about alternative approach, let us check the definition of the SQL comparison or logical operators.

Following is the syntax of using SQL logical operators.

SELECT * FROM table1
where x op ALL[ANY|SOME] ('a', 'b', 'c');

SELECT * FROM table1
where x op ALL[ANY|SOME] (subquery);

Operator	Description
ALL	Returns TRUE if the comparison of column or expression and every literal in the list produces true results. Similarly, ALL returns TRUE if the comparison of column or expression and every value in the set of values returned by subquery produces true results.
ANY	Returns TRUE if the comparison of expression and any literal in the list is true. Similarly, ANY returns TRUE if the comparison of expression and at least one value in the set of values returned by subquery is true.
SOME	Returns TRUE if the comparison of expression and any literal in the list is true. Similarly, SOME returns TRUE if the comparison of expression and at least one value in the set of values returned by subquery is true.

Redshift Comparison Operators – ALL, SOME, ANY Alternative

Following are the ALL, ANY and SOME comparison operator examples with an alternative approach.

ALL Logical or Comparison Operator Alternative in Redshift

Consider following example with ALL quantifier.

SELECT * FROM table1
where x = ALL ('a', 'b', 'c');

As per the definition, column x value is equal to every literal in the list.

The following query provides equivalences for the ALL quantifiers.

SELECT * FROM table1
where (x = 'a') AND (x = 'b') AND (x = 'c');

ANY Logical or Comparison Operator Alternative in Redshift

Consider following example with ANY quantifier.

SELECT * FROM table1
where x = ANY ('a', 'b', 'c');

As per the definition, column x value is equal to any literal in the list.

The following query provides equivalences for the ANY quantifiers.

SELECT * FROM table1
where (x = 'a') OR (x = 'b') OR (x = 'c');

SELECT * FROM table1
where x IN ('a', 'b', 'c');

SOME Logical or Comparison Operator Alternative in Redshift

Consider following example with SOME quantifier.

SELECT * FROM table1
where x = SOME ('a', 'b', 'c');

As per the definition, column x value is equal to any literal in the list. In other words, ANY and SOME quantifiers are similar.

The following query provides equivalences for the SOME quantifiers.

SELECT * FROM table1
where (x = 'a') OR (x = 'b') OR (x = 'c');

SELECT * FROM table1
where x IN ('a', 'b', 'c');