Difference between revisions of "UNIQUE()"

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=UNIQUE()=
 
 
 
==Class==
 
Indexing
 
 
 
 
==Purpose==
 
==Purpose==
 
Function to test for unique indexes
 
Function to test for unique indexes
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==See Also==
 
==See Also==
[[INDEXKEY()]], [[KEY()]], [[INDEXORDER()]], [[SET UNIQUE]], [[INDEX]]
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[[INDEX]], [[INDEXKEY()]], [[INDEXORDER()]], [[KEY()]], [[SET UNIQUE]]  
  
  
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==Products==
 
==Products==
Recital Database Server, Recital Mirage Server, Recital Terminal Developer
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Recital, Recital Server
 
[[Category:Documentation]]
 
[[Category:Documentation]]
 
[[Category:Functions]]
 
[[Category:Functions]]
 +
[[Category:Indexing]]
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[[Category:Indexing Functions]]

Latest revision as of 16:45, 8 December 2009

Purpose

Function to test for unique indexes


Syntax

UNIQUE(<expN>)


See Also

INDEX, INDEXKEY(), INDEXORDER(), KEY(), SET UNIQUE


Description

The UNIQUE() function returns .T. if the specified index <expN> is unique, and .F. if it is not unique. <expN> is the index number from 0 to 20. If zero is specified then UNIQUE() tests the master index. For tagged multiple indexes, only the master index can be tested.


Example

use accounts
index on name to name unique
? unique(0)
.T.


Products

Recital, Recital Server