all_or_any_predicate

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4D v20



	Command all_or_any_predicatarithmetic_expression {< \| <= \| = \| >= \| > \| <>} {ANY \| ALL \| SOME} (subquery)

Description

An all_or_any_predicate is used to compare an arithmetic_expression with a subquery. You can pass comparison operators like <, <=, =, >=, > or <> as well as the ANY, ALL and SOME keywords along with the subquery to be used for comparison.

Beispiel

This example carries out a subquery which selects the best software sales. The main query selects records from the SALES and CUSTOMERS tables where the Total_value column is greater than the records selected by the subquery:

SELECT Total_value, CUSTOMERS.Customer
FROM SALES, CUSTOMERS
WHERE SALES.Customer_ID = CUSTOMERS.Customer_ID
AND Total_value > ALL   (SELECT MAX (Total_value)
FROM SALES
WHERE Product_type = 'Software');

Siehe auch

arithmetic_expression
predicate
subquery