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Max. columns in Unique Constraint [message #117573] Thu, 28 April 2005 05:49 Go to next message
muktha
Messages: 4
Registered: April 2005
Location: Bangalore
Junior Member
Hello,

I read in one of the site saying that maximum No. of columns allowed for Unique is 32, but in Oracle 9i is accepting 33 columns & giving error for 34 columns. So whatz the Max. No of columns allowed for Unique key Constraint.

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Re: Max. columns in Unique Constraint [message #118057 is a reply to message #117573] Mon, 02 May 2005 20:19 Go to previous messageGo to next message
djmartin
Messages: 10181
Registered: March 2005
Location: Surges Bay TAS Australia
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Does the number of characters have any impact on the number of columns?

David

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Re: Max. columns in Unique Constraint [message #118087 is a reply to message #118057] Tue, 03 May 2005 00:12 Go to previous messageGo to next message
muktha
Messages: 4
Registered: April 2005
Location: Bangalore
Junior Member
No, number of columns will not have any impact on number of columns

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Re: Max. columns in Unique Constraint [message #118088 is a reply to message #117573] Tue, 03 May 2005 00:51 Go to previous message
djmartin
Messages: 10181
Registered: March 2005
Location: Surges Bay TAS Australia
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From 10g doco.
Quote:

column

Specify the name of a column in the table. A bitmap index can have a maximum of 30 columns. Other indexes can have as many as 32 columns.

David

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