[SQL] Upgrading from 6.2 to 7

We are planing to upgrade to version 7 of Postgres, I understand that you cannot use version 6 databases with 7.  Where can I find information on how to convert these Databases ?   Sean   Ion Solutions

[SQL]

Why does this error come up    ionsol=> update quickstock set ItemDesc = '1',Qty = 0.0,salesprice = 0.0 where StockID = '8597' \gERROR:  Relation 'quickstock' does not have attribute 'itemdesc'     when ItemDesc does exist.   Sean