Difference between revisions of "TAGEXPR()"
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(Created page with '==Purpose== Function to return the key expression of an index tag ==Syntax== TAGEXPR(<tagno> [, <alias>]) ==See Also== KEY(), MDX(), ORDER(), SET INDEX, [[SET O…') |
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==See Also== | ==See Also== | ||
− | [[KEY()]], [[MDX()]], [[ORDER()]], [[SET INDEX]], [[SET ORDER]], [[TAG()]], [[TAGCOUNT()]], [[TAGFOR()]], [[TAGKEY()]], [[TAGNO()]], [[TAGUNIQUE()]] | + | [[INDEX]], [[KEY()]], [[MDX()]], [[ORDER()]], [[SET INDEX]], [[SET ORDER]], [[TAG()]], [[TAGCOUNT()]], [[TAGFOR()]], [[TAGKEY()]], [[TAGNO()]], [[TAGUNIQUE()]], [[USE]] |
==Description== | ==Description== |
Revision as of 13:00, 15 November 2012
Contents
Purpose
Function to return the key expression of an index tag
Syntax
TAGEXPR(<tagno> [, <alias>])
See Also
INDEX, KEY(), MDX(), ORDER(), SET INDEX, SET ORDER, TAG(), TAGCOUNT(), TAGFOR(), TAGKEY(), TAGNO(), TAGUNIQUE(), USE
Description
The TAGEXPR() function returns the key expression for the specified index tag. Tag numbers are assigned as they are added to multiple index files. The first tag added is number 1, the second is number 2, and so on. With no <alias> specified, the TAGEXPR() function operates in the currently selected workarea.
Parameter | Description |
---|---|
<tagno> | The number of the tag |
<alias> | The workarea in which to operate. Specified in any of the following ways:
A workarea number. A workarea letter: A-Z (a-z) excluding M (m). A table alias. The alias can be specified in the USE command. If not specified, the table basename is used. |
Example
open database southwind use customers in 1 select 2 use orders ?tagexpr(2,"customers")