Home
SQL programmingYou can use the HCL OneDB™ implementation of the SQL language to develop applications for HCL OneDB™ database servers.
Guide to SQL: SyntaxThe HCL OneDB™ Guide to SQL: Syntax describes the syntax of the statements, data types, expressions, operators, and built-in functions of the HCL OneDB™ dialect of the SQL language.
SQL statementsThis chapter describes the syntax and semantics of SQL statements that are recognized by HCL OneDB™.
SELECT statementUse the SELECT statement to retrieve values from a database or from an SPL or collection variable. A SELECT operation is called a query.
WHERE clause of SELECTThe WHERE clause can specify join conditions for HCL OneDB™-extension joins, post-join filters for ANSI-compliant joins, and for search criteria on data values.
Using a Condition in the WHERE Clause
IN Subquery With the IN subquery, more than one row that satisfies the IN or NOT IN condition can be returned, but only one column can be returned.

IN Subquery

With the IN subquery, more than one row that satisfies the IN or NOT IN condition can be returned, but only one column can be returned.

This example shows the use of a NOT IN subquery in a SELECT statement:

SELECT DISTINCT customer_num FROM orders
   WHERE order_num NOT IN
      (SELECT order_num FROM items
         WHERE stock_num = 1);

For additional information, see the IN Condition.