Changing datatype of a column

<br /><p><font face="Arial" size="2">              Hi,</font><p><font face="Arial" size="2">              I would like
toKnow if there any way (and what is the command for that)  to convert a column datatype</font><br /><font face="Arial"
size="2">             from int4 to numeric(11)  of an existing table that have data in it?</font><br /><font
face="Arial"size="2">              </font><br /><font face="Arial" size="2">         </font><br /><font face="Arial"
size="2">            Thanks,</font><br /><font face="Arial" size="2">             Ilan</font><p><font face="Arial"
size="2"> </font><br /><b><font color="#000000" face="Century
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