Difference between revisions of "LOOKUP()"

Revision as of 16:07, 27 October 2009

Purpose

Function to perform a cross-table lookup

Syntax

LOOKUP(<exp>, <key expression>, <workarea | alias>)

See Also

CREATE, MODIFY STRUCTURE, RLOOKUP(), SEEK(), SET RELATION

Description

The LOOKUP() function looks up the specified index <key expression> in the master index of specified <workarea | alias>. The LOOKUP() function then evaluates the expression <exp>, and returns the value of the <exp> if the <key expression> is found. The LOOKUP() function returns a null string if the <key expression> is not found. The lookup function can be very useful for dealing with calculated expressions in either the Application Data Dictionary or the Forms Designer.

Example

use depts in 2 index dnum
use funcs in 1 index funcno
? lookup(depts->dname,funcs->dnum,depts)
Research and Development

Products

Recital Database Server, Recital Mirage Server, Recital Terminal Developer