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I am using LLBLGEN where there is a method to execute a query as a scalar query. Googling gives me a definition for scalar sub-query, are they the same ?
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A scalar subquery can be used anywhere in an SQL query that a column or expression can be used. FROM emp, (SELECT dept_name FROM dept WHERE dept = 'finance') dept1; Scalar subqueries can also be used for inserting into tables, based on values from other tables.
A scalar subquery expression is a subquery that returns exactly one column value from one row. The value of the scalar subquery expression is the value of the select list item of the subquery. If the subquery returns 0 rows, then the value of the scalar subquery expression is NULL .
A scalar subquery is a subquery that returns a single value. This is the simplest form of a subquery, and can be used in most places a literal or single column value is valid. The data type, length and character set and collation are all taken from the result returned by the subquery.
Scalar Queries The most basic SQL query is to get a list of scalars (values) from one or more tables. Following is the syntax for using native SQL for scalar values − String sql = "SELECT first_name, salary FROM EMPLOYEE"; SQLQuery query = session. createSQLQuery(sql); query. setResultTransformer(Criteria.
A scalar query is a query that returns one row consisting of one column.
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