🥚 添加sql分区，按照时间分区

sql/partion.sql

@@ -0,0 +1,74 @@
+-- 1997-2018  22年
+-- 3380 城市
+-- 总 74360次爬取
+-- 一次爬取 365*3 条
+-- 查询已爬取城市数据 count(*) 查总数; * 查数据
+select sum(if(t.status = 0, 1, 0)) "未爬",
+       sum(if(t.status = 1, 1, 0)) "已爬"
+from city t
+where t.level <= 3;
+
+select 73292 * 365
+-- 查询未爬取城市数据
+select count(*)
+from city t
+group by t.code;
+
+-- 查询导出数据总数
+select count(*)
+from sun;
+
+select *
+from sun
+limit 10 offset 686340
+
+-- 查询数 带有城市名
+select c.name, s.*
+from sun s
+         left join
+     city c on s.code = c.code
+
+explain
+select *
+from city
+where code = 140300
+  and year = 1997
+
+-- 半小时
+select 392460 - 296484;
+-- 一小时爬取
+select 95976 * 2;
+-- 剩余爬取天数
+select 26751580 / (95976 * 2) / 24;
+
+-- 查看分区支持
+show variables like '%partition%';
+show plugins;
+SELECT VERSION();
+
+-- 按照时间分区
+ALTER TABLE sun PARTITION BY RANGE COLUMNS (time)
+    (
+    PARTITION p1997 VALUES LESS THAN ('1998-01-01'),
+    PARTITION p1998 VALUES LESS THAN ('1999-01-01'),
+    PARTITION p1999 VALUES LESS THAN ('2000-01-01'),
+    PARTITION p2000 VALUES LESS THAN ('2001-01-01'),
+    PARTITION p2001 VALUES LESS THAN ('2002-01-01'),
+    PARTITION p2002 VALUES LESS THAN ('2003-01-01'),
+    PARTITION p2003 VALUES LESS THAN ('2004-01-01'),
+    PARTITION p2004 VALUES LESS THAN ('2005-01-01'),
+    PARTITION p2005 VALUES LESS THAN ('2006-01-01'),
+    PARTITION p2006 VALUES LESS THAN ('2007-01-01'),
+    PARTITION p2007 VALUES LESS THAN ('2008-01-01'),
+    PARTITION p2008 VALUES LESS THAN ('2009-01-01'),
+    PARTITION p2009 VALUES LESS THAN ('2010-01-01'),
+    PARTITION p2010 VALUES LESS THAN ('2011-01-01'),
+    PARTITION p2011 VALUES LESS THAN ('2012-01-01'),
+    PARTITION p2012 VALUES LESS THAN ('2013-01-01'),
+    PARTITION p2013 VALUES LESS THAN ('2014-01-01'),
+    PARTITION p2014 VALUES LESS THAN ('2015-01-01'),
+    PARTITION p2015 VALUES LESS THAN ('2016-01-01'),
+    PARTITION p2016 VALUES LESS THAN ('2017-01-01'),
+    PARTITION p2017 VALUES LESS THAN ('2018-01-01'),
+    PARTITION p2018 VALUES LESS THAN ('2019-01-01')
+    )