Sophie: postgresql8.2-docs-8.2.14-1mdv2010.0 i586

postgresql8.2-docs-8.2.14-1mdv2010.0.i586.rpm

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>    You can update existing rows using the
    <TT
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> command. 
    Suppose you discover the temperature readings are
    all off by 2 degrees after November 28.  You may correct the
    data as follows:

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>UPDATE weather
    SET temp_hi = temp_hi - 2,  temp_lo = temp_lo - 2
    WHERE date &gt; '1994-11-28';</PRE
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>    Look at the new state of the data:
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>SELECT * FROM weather;

     city      | temp_lo | temp_hi | prcp |    date
---------------+---------+---------+------+------------
 San Francisco |      46 |      50 | 0.25 | 1994-11-27
 San Francisco |      41 |      55 |    0 | 1994-11-29
 Hayward       |      35 |      52 |      | 1994-11-29
(3 rows)</PRE
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