mysql 海量数据删除

 

 

 

看到这儿的话，最后看下这篇文章，对于操作海量数据的sql深入分析

 

dzh项目海量数据删除实战，看了上面文章，考虑truncate只能删除数据，表没有删掉，我就用了drop

 

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需求，除了dzh_weibo_cache表其余的都要删除

dzh_weibo_cache --2000w

dzh_weibo_cache111 --1500w

dzh_weibo_cache2 --400w

dzh_weibo_cache3 --700w

 

下面数操作后的结果，drop对于删除海量数据表方便又快

 

mysql> show tables;
+---------------------------+
| Tables_in_dzh_crawl_weibo |
+---------------------------+
| dzh_weibo_cache           |
| dzh_weibo_cache111        |
| dzh_weibo_cache2          |
| dzh_weibo_cache3          |
+---------------------------+
4 rows in set (0.00 sec)

mysql> DROP TABLE dzh_weibo_cache2;
Query OK, 0 rows affected (8.50 sec)

mysql> show tables;
+---------------------------+
| Tables_in_dzh_crawl_weibo |
+---------------------------+
| dzh_weibo_cache           |
| dzh_weibo_cache111        |
| dzh_weibo_cache3          |
+---------------------------+
3 rows in set (0.00 sec)

mysql> DROP TABLE dzh_weibo_cache3;
Query OK, 0 rows affected (10.85 sec)

mysql> show tables;
+---------------------------+
| Tables_in_dzh_crawl_weibo |
+---------------------------+
| dzh_weibo_cache           |
| dzh_weibo_cache111        |
+---------------------------+
2 rows in set (0.00 sec)

mysql> DROP TABLE dzh_weibo_cache111;
Query OK, 0 rows affected (18.84 sec)