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@ -10,7 +10,7 @@ |
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alink="#0000ff"> |
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<H1>Frequently Asked Questions (FAQ) for PostgreSQL</H1> |
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<P>Last updated: Sun Jan 16 21:40:18 EST 2005</P> |
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<P>Last updated: Sun Jan 16 22:01:06 EST 2005</P> |
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<P>Current maintainer: Bruce Momjian (<A href= |
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"mailto:pgman@candle.pha.pa.us">pgman@candle.pha.pa.us</A>)<BR> |
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@ -854,8 +854,8 @@ |
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<H4><A name="4.4">4.4</A>) How do you remove a column from a |
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table, or change its data type?</H4> |
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<P><SMALL>DROP COLUMN</SMALL> functionality was added in release 7.3 with |
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<SMALL>ALTER TABLE DROP COLUMN</SMALL>. In earlier versions, |
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<P><SMALL>DROP COLUMN</SMALL> functionality was added in release 7.3 |
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with <SMALL>ALTER TABLE DROP COLUMN</SMALL>. In earlier versions, |
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you can do this:</P> |
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<PRE> |
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BEGIN; |
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@ -868,7 +868,10 @@ |
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COMMIT; |
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</PRE> |
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<P>To change the data type of a column, do this:</P> |
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<P>Changing the data type of a column can be done easily in 8.0 |
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and later with <SMALL>ALTER TABLE ALTER COLUMN TYPE</SMALL>. |
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<P>In earlier releases, do this:</P> |
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<PRE> |
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BEGIN; |
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ALTER TABLE tab ADD COLUMN new_col <i>new_data_type</i>; |
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