DB2数据库用优化器更新执行计划经验超精版！
数据复制db2 runstats on table db2inst1.staff with distribution and detailed indexes all 1.
数据复制db2 runstats on table db2inst1.staff with distribution and detailed indexes all 1.
数据复制db2 runstats on table db2inst1.staff with distribution and detailed indexes all 1.