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|1. (WO2018182058) JOIN METHOD FOR RELATIONAL DATABASE|
|Applicants:||REALTIMETECH CO., LTD.
|Title:||JOIN METHOD FOR RELATIONAL DATABASE|
The present invention relates to a join method for a relational database, by which a join condition for a table having a range value including an integer column and having sequentially sorted indexed data values is reversed to reduce the number of operations for a comparison operation between two tables to be joined, thereby enabling range join to be efficiently performed, and as a table has more data to be compared, the performance of a range search can be improved.