oracle 表链接方式: nested loop 嵌套循环和Hash Join的比较

1、建立两张实验用表:wireless_site.merchant和wireless_site.bbsql SQL> select count(*) from wireless_site.merchant;session   COUNT(*) ----------      14005less SQL>oop SQL> select count(*) from wireless_site.clic
相关文章
相关标签/搜索