% @(#)copy_tt.hlq	17.1.1.1 (ESO-IPG) 01/25/02 17:43:26 
%++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
%.COPYRIGHT  (c)  1990 European Southern Observatory
%.IDENT      copy_tt.hlq
%.AUTHOR     JDP, IPG/ESO
%.KEYWORDS   MIDAS, help files, COPY/TT
%.PURPOSE    On-line help file for the command: COPY/TT
%.VERSION    1.0  12-OCT-1983 : Creation, JDP
%----------------------------------------------------------------
\se
SECTION./TT
\es\co
COPY/TT							12-OCT-1983  JDP
\oc\su
COPY/TT intable incolumn [outable] outcolumn
	copy a table column to an other existing table
\us\pu
Purpose:   
           Copy a table column to another existing table 
\up\sy
Syntax:    
           COPY/TT intable incolumn [outable] outcolumn
\ys\pa
           intable   = input table name
\ap\pa
           incolumn  = input column reference
\ap\pa
           outable   = optional output table name.
                       Default is the input table
                       The output table MUST already exist. 
\ap\pa
           outcolumn = output column label
\ap\no
Note:      
           If the reference column is not defined, entries are copied 
           sequentially. If the reference column is defined both in the 
           input and output tables, entries with equal reference value 
           are copied.  The reference column for a table is defined with the
           command SET/REFCOLUMN. The functions are the same if you use the 
           same table as input and output. Note that in this case, if the 
           reference column is not defined (sequence number is acting as 
           reference), then the N selected entries are copied to the first 
           N rows.
           This command can be used to transform a column of a certain type
           to a column of an another type.
\on\sa
See also:
           PROJECT/TAB, COPY/TAB, SET/REFC
\as\exs
Examples:
\ex
           COPY/TT TABLE1 :INPUT TABLE2 :OUTPUT
\xe \sxe