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MySql is an excellent database by T.C.X. DataKonsultAB as free software. It is a true multi-user, multi-threaded SQL database server.
MySQL since 1996 in an environment with more than 40 databases containing 10,000 tables, of which more than 500 tables have more than 7 million rows. This is about 100 gigabytes of mission-critical data.
CREATE TABLE t ( ...) DEFAULT CHARACTER SET utf8 COLLATE utf8_bin;