% @(#)set_refc.hlq	17.1.1.1 (ESO-IPG) 01/25/02 17:43:57 
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%.COPYRIGHT  (c)  1990 European Southern Observatory
%.IDENT      set_refc.hlq
%.AUTHOR     JDP, IPG/ESO
%.KEYWORDS   MIDAS, help files, SET/REFCOLUMN
%.PURPOSE    On-line help file for the command: SET/REFCOLUMN
%.VERSION    1.0  17-OCT-1983 : Creation, JDP
%----------------------------------------------------------------
\se
SECTION./REFC
\es\co
SET/REFCOLUMN						17-OCT-1983  JDP
\oc\su
SET/REFCOLUMN table column
	define column as reference in table access
\us\pu
Purpose:  
           Defines a column as reference.
\\
           The values in the reference column can be used to access the table.
\up\sy
Syntax: 
           SET/REF table column
\ys\pa
           table  = table name
\ap\pa
           column = column to be selected as reference. To reset the reference
                  to the sequence number, use SEQUENCE as parameter
\ap\see
See also:
           COPY/TT
\ees\no
Note: 
           none
\on\exs
Examples:
\ex
           SET/REF mytable :DHNUMBER
           Use column labelled :DHNUMBER as reference in table mytable.tbl.
\xe \sxe