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摘要： 看了小布老师关于block里面数据存储的high water mark的实验，自己也做了一遍。SQL> create table x(i int,name varchar(20));Table created.SQL> select count(*) from x; COUNT(*)---------- 0Statistics---------------------------------------------------------- 1 recursive calls 0 db block gets 4 consistent gets 0 physical... 阅读全文