做网站还挣钱吗,国产手机做系统下载网站,宁波网站设计推广培训班,建设教育局网站硬件价格需要多少钱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
