PostgreSQL Tutorial
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# Populating a Class with Instances

The INSERT statement is used to populate a class with instances:

    INSERT INTO weather
        VALUES ('San Francisco', 46, 50, 0.25, '11/27/1994');

You can also use the COPY command to perform load large amounts of data from flat (ASCII) files. This is usually faster because the data is read (or written) as a single atomic transaction directly to or from the target table. An example would be:

    COPY weather FROM '/home/user/weather.txt'
        USING DELIMITERS '|';

where the path name for the source file must be available to the backend server machine, not the client, since the backend server reads the file directly.

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