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Add support for newly added functionality in Oracle 12.2: collations for columns
Case-Insensitive Database Oracle Database supports case-insensitive collations. By applying such collations to SQL operations, an application can perform string comparisons and matching in a case-insensitive way, independent of the language of the data. With the new Oracle Database 12c Release 2 (12.2) ability to declare collations for columns, you can declare a column to always be compared in a case-insensitive way. The column collation, if not specified explicitly, is inherited from a table default collation, which in turn is inherited from a schema default collation. This way, you can easily declare all character columns of an application in a database as case-insensitive.
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