What is the maximum number we can give for varchar (number) in postgresql 7.4.x
Details on data-types are in the manuals under "Data Types". Go to http://www.postgresql.org, click "Documentation" then choose "7.4 (without comments)" on the right-hand side. Data Types are in the section "The SQL Language". The varchar(n) type is detailed in "Character Types".
HTH -- Richard Huxton Archonet Ltd
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TIP 9: the planner will ignore your desire to choose an index scan if your
joining column's datatypes do not match
