How can I use MySQL database in Qt 5.0.1 on Linux and Windows?

When I wrote
Qt Code:
  1. QSqlDatabase db = QSqlDatabase::addDatabase("QMYSQL");
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Qt Creator said:
Qt Code:
  1. QSqlDatabase: QMYSQL driver not loaded
  2. QSqlDatabase: available drivers: QSQLITE
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Sorry for my English