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August 4, 2012 / doganay

ORA-00955: name is already used by an existing object

Problem:
When creating an uppercase named table, you get following error:
create table a (a number);
create table A (b number);
ORA-00955: name is already used by an existing object

Cause:
In order to create uppercase named tables you must use double quotes (“)

Solution:
create table “A” (b number);

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