The grg program can make an SQL query to
an Ingres or GNU SQL Server RDBMS and load the
results internally as a database file. Subsequent
to this it can be treated exactly as if it was a database file initially, all
the normal operations such as sorting, filtering, field evaluatiing, and
equate processing may be used. The section gives an overview of how to use
this feature. This feature will only work if support was added for it when the
program was compiled.
You must generally run grg on the database server for the query to work unless you have some form of networked service in operation.
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