营销型网站建设中坚站,制作企业网站的问题,成都网站开发多少钱,网站推广案例分析Hash join 慢的实例
> select /*+ SHUFFLE_HASH(ws) */ count(1) FROM store_sales ss
> LEFT JOIN web_sales ws > ON ss.ss_item_sk = ws.ws_item_sk;
8656494997280
Time taken: 12232.401
Hash join 慢的实例
> select /*+ SHUFFLE_HASH(ws) */count(1) FROM store_sales ss
> LEFT JOIN web_sales ws > ON ss.ss_item_sk = ws.ws_item_sk;8656494997280
Time taken:12232.401