%++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
%.COPYRIGHT  (c)  1990-2008 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
%----------------------------------------------------------------
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SECTION./REFC
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SET/REFCOLUMN						23-APR-2008  JDP
\oc\su
SET/REFCOLUMN table [column]
	define column as reference in table access
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Purpose:  
           Defines a column as reference.
\\
           The values in the reference column are used to find matching 
	   entries (rows) when copying tables.
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Syntax: 
           SET/REFCOLUMN table [column]
\ys\pa
           table  = table name
\ap\pa
           column = column to be selected as reference, if omitted defaulted
	        to SEQUENCE.
\ap\see
See also:
           COPY/TT
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Note: 
 	   To set the reference to the sequence number, use SEQUENCE (or SEQ)
	   as parameter. 
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Examples:
\ex
           SET/REFCOL quimonda :DHNUMBER
              Use column labelled :DHNUMBER as reference in table quimonda.tbl.
\xe \sxe
