| 摘要 |
PROBLEM TO BE SOLVED: To shorten a time required for sort processing of a table constituting a database.SOLUTION: A Karaoke remote controller relating to this invention executes sort processing which sorts a table stored in storage means and expands the table in a memory by executing a set sort system among a plurality of sort systems, measurement processing which measures a time required to expand the table stored in the storage means in the memory or sort cost being a calculation amount in the case of determining that the database is updated, and change processing which changes a set sort system into another sort system in the case that the sort cost is larger than a prescribed amount. |
