1. A method of database query, comprising: in response to a query request, obtaining a first query plan for minimum query response time and a second query plan for minimum query total time for the query request; starting execution of the first query plan and execution of the second query plan; outputting, before execution of the second query plan reaches a specified point, an initial query result obtained from execution of the first query plan; and in response to execution of the second query plan reaching the specified point, continuing execution of the second query plan to output remaining query results.