Difference between revisions of "REFERENCES()"
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Revision as of 10:54, 4 February 2013
Contents
Purpose
Function to perform a cross-table lookup for a specified key expression
Syntax
REFERENCES(<key expression>, <workarea | alias> [,<tag name>])
See Also
ALIAS(), INDEX, KEY(), KEYMATCH(), LOOKUP(), RLOOKUP(), SEEK, SEEK(), SET RELATION, TAG(), TAGCOUNT(), TAGNO()
Description
The REFERENCES() function looks up the specified <key expression> in the master tag index of the specified <workarea | alias>. The <workarea | alias> is the workarea or alias name of an open table. To search in a tag index which is not the current master index, the optional <tag name> parameter can be used. The tag name must be specified as a string.
The REFERENCES() function returns True (.T.) or False (.F.), depending on the success of the lookup operation.
Please see the RLOOKUP() function for cross-table lookups using single indexes (.ndx).
Example
use customer.rdb index on account_no tag account_no index on upper(last_name) tag uplast index on zip tag zip ? references("STEREK",customer,"uplast") .T.
