DB2 UDB identity columns are one of many V5R2 SQL enhancements that make it easier to port databases from other platforms to the iSeries. One characteristic common to many of the tables in a database is that they contain unique identifiers, which are typically used as an index to the data they identify. For example, a customer number field uniquely identifies a customer and ties information in the database to that customer. Some applications require that users assign these ...

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