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- 4D SQL Reference
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- Syntax rules
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Syntax rules
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4d_function_call
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4d_language_reference
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all_or_any_predicate
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arithmetic_expression
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between_predicate
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case_expression
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column_definition
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column_reference
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command_parameter
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comparison_predicate
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exists_predicate
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foreign_key_definition
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function_call
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in_predicate
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is_null_predicate
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like_predicate
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literal
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predicate
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primary_key_definition
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search_condition
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select_item
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sort_list
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sql_data_type_name
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sql_name
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sql_string
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subquery
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table_constraint
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table_reference
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all_or_any_predicate
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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.
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');
Product: 4D
Theme: Syntax rules
4D SQL Reference ( 4D v20 R8)
