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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

Using a Condition in the WHERE Clause

You can use these simple conditions or comparisons in the WHERE clause:

Relational-operator condition
IN or BETWEEN . . . AND
IS NULL or IS NOT NULL
LIKE or MATCHES

You also can use a SELECT statement within the WHERE clause; this is called a subquery. The following WHERE clause operators are valid in a subquery:

IN or EXISTS
ALL, ANY, or SOME

For more information, see Condition.

In the WHERE clause, an aggregate function is not valid unless it is part of a subquery or is on a correlated column originating from a parent query, and the WHERE clause is in a subquery within a HAVING clause.

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