问题描述
MysqL> SHOW CREATE TABLE lz_stats_aggs\G
*************************** 1. row ***************************
Table: lz_stats_aggs
Create Table: CREATE TABLE `lz_stats_aggs` (
`year` smallint(4) unsigned NOT NULL DEFAULT '0',`month` tinyint(3) unsigned NOT NULL DEFAULT '0',`day` tinyint(3) unsigned NOT NULL DEFAULT '0',`time` int(10) unsigned NOT NULL DEFAULT '0',`mtime` int(10) unsigned NOT NULL DEFAULT '0',`sessions` int(10) unsigned NOT NULL DEFAULT '0',`visitors_unique` int(10) unsigned NOT NULL DEFAULT '0',`conversions` int(10) unsigned NOT NULL DEFAULT '0',`aggregated` int(10) unsigned NOT NULL DEFAULT '0',`chats_forwards` int(10) unsigned NOT NULL DEFAULT '0',`chats_posts_internal` int(10) unsigned NOT NULL DEFAULT '0',`chats_posts_external` int(10) unsigned NOT NULL DEFAULT '0',`avg_time_site` double unsigned NOT NULL DEFAULT '0',PRIMARY KEY (`year`,`month`,`day`),KEY `time` (`time`),KEY `aggregated` (`aggregated`),KEY `mtime` (`mtime`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8 COLLATE=utf8_bin
1 row in set (0.00 sec)
MysqL> describe lz_stats_aggs;
+----------------------+----------------------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+----------------------+----------------------+------+-----+---------+-------+
| year | smallint(4) unsigned | NO | PRI | 0 | |
| month | tinyint(3) unsigned | NO | PRI | 0 | |
| day | tinyint(3) unsigned | NO | PRI | 0 | |
| time | int(10) unsigned | NO | MUL | 0 | |
| mtime | int(10) unsigned | NO | MUL | 0 | |
| sessions | int(10) unsigned | NO | | 0 | |
| visitors_unique | int(10) unsigned | NO | | 0 | |
| conversions | int(10) unsigned | NO | | 0 | |
| aggregated | int(10) unsigned | NO | MUL | 0 | |
| chats_forwards | int(10) unsigned | NO | | 0 | |
| chats_posts_internal | int(10) unsigned | NO | | 0 | |
| chats_posts_external | int(10) unsigned | NO | | 0 | |
| avg_time_site | double unsigned | NO | | 0 | |
+----------------------+----------------------+------+-----+---------+-------+
13 rows in set (0.00 sec)
我还有其他几张表具有相同的天，月和年字段作为主键。 现在，我需要将表中的数据插入到今天的17/7/2020。 但是，当我这样做时，会出现错误：
MysqL> LOAD DATA INFILE '/var/opt/rh/rh-MysqL57/lib/MysqL-files/lz_stats_aggs07.csv' INTO TABLE lz_stats_aggs FIELDS TERMINATED BY ',';
ERROR 1062 (23000): Duplicate entry '2020-7-20' for key 'PRIMARY'
当我检查表格中17日之后的日期时，我得到了：
MysqL> select * from lz_stats_aggs where day >= '16' and month = '7' and year = '2020';
+------+-------+-----+------------+----------+----------+-----------------+-------------+------------+----------------+----------------------+----------------------+---------------+
| year | month | day | time | mtime | sessions | visitors_unique | conversions | aggregated | chats_forwards | chats_posts_internal | chats_posts_external | avg_time_site |
+------+-------+-----+------------+----------+----------+-----------------+-------------+------------+----------------+----------------------+----------------------+---------------+
| 2020 | 7 | 16 | 1595235228 | 3557100 | 416 | 416 | 0 | 1595235227 | 0 | 982 | 987 | 1316.7668 |
| 2020 | 7 | 17 | 1595005244 | 10273000 | 409 | 408 | 0 | 1595005243 | 0 | 719 | 614 | 2075.2298 |
| 2020 | 7 | 18 | 1595091680 | 49116400 | 0 | 0 | 0 | 1595091680 | 0 | 0 | 0 | 0 |
| 2020 | 7 | 19 | 1595178102 | 97573600 | 1 | 1 | 0 | 1595178102 | 0 | 0 | 0 | 7859 |
| 2020 | 7 | 20 | 1595385572 | 99382700 | 0 | 0 | 0 | 1595385572 | 0 | 0 | 0 | 0 |
| 2020 | 7 | 24 | 1595670196 | 56234500 | 0 | 0 | 0 | 1595670196 | 0 | 0 | 0 | 0 |
| 2020 | 7 | 25 | 1597584414 | 1487900 | 0 | 0 | 0 | 1597584413 | 0 | 0 | 0 | 0 |
+------+-------+-----+------------+----------+----------+-----------------+-------------+------------+----------------+----------------------+----------------------+---------------+
7 rows in set (0.00 sec)
我的问题是，如果我删除这些行，它将如何影响该数据库中的其他表？ “关键”项目的功能是什么，例如时间，合计和mtime？删除这些行会在其他表中引起问题吗？
解决方法
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