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(一)问题背景 最近在对一个大约200万行数据的表查看执行计划时,发现存在异常,理论上应该返回100多万笔数据的,但是执行计划只返回了2条数据,比较奇怪,稍微思考,肯定是统计信息出问题了。 explain plan for select *...
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