NAME

       taql - query language for casacore tables

SYNOPSIS

       taql [OPTIONS]

DESCRIPTION

       The  Table  Query Language (TaQL) is an SQL-like high level language to do operations like
       selection, sort, and update on a casacore table. It is a very versatile language with full
       support  for  table  columns  containing  array  data.  It has inherent support for masked
       arrays, units, and astronomical coordinates. It has a very rich  set  of  functions  (like
       cone  search  and  array reduction) making it very suitable for astronomical applications.
       User  defined  functions  can  be  added   easily.   It   also   has   full   support   of
       grouping/aggregation  and  nested  queries. An operation that can be expressed in a single
       function is the matching of two sky catalogues.

       taql can be started with multiple  arguments  containing  options  and  an  optional  TaQL
       command  as  the last argument.  It will run interactively if no TaQL command is given. If
       possible, interactive commands are kept in $HOME/.taqlhistory for later reuse.

       A binding in C++, Python, and Glish is available.

OPTIONS

       -s,--style
              defines the TaQL style. The default style is python; if no value is given after  -s
              it defaults to glish.

       -h,--help
              show help and exits.

       -ps,--printselect
              show the values of selected columns.

       -pm,--printmeasure
              if possible, show values as formatted measures.

       -pc,--printcommand
              show the (expanded) TaQL command.

       -pr,--printrows
              show the number of rows selected, updated, etc.

       The  default for -pc is on for interactive mode, otherwise off.  The default for -pr, -ps,
       and -pm is on.

SEE ALSO

       http://www.astron.nl/casacore/trunk/casacore/doc/notes/199.html

AUTHOR

       This manual page was written by Benda Xu <heroxbd@gentoo.org>, for  the  Debian  GNU/Linux
       system.