, ROW_NUMBER() OVER(PARTITION BY P.SQL_ID ORDER BY P.SQL_ID) AS ROWNUMS FROM V$SQL_PLAN...在v$sqlarea视图中,last_load_time和last_active_time,解释如下, LAST_LOAD_TIME,DATE类型 Time at which the query plan...the query plan was last active SQL最新一次执行的时间 在v$sql视图中,last_load_time和last_active_time,解释如下, LAST_LOAD_TIME...last_active_time和last_load_time是硬解析的时间。...因此,如果我的需求是找出前一天应用跑过的逻辑中使用全表扫描执行计划的SQL,从准确性讲,应该用的是last_active_time,不是last_load_time,因为很可能由于缓存了执行计划,last_load_time
问题描述 现象上,MySQL 出现了 Crash,摘录部分错误日志内容,如下: 2021-03-12T14:54:26.302945+08:00 0 [ERROR] InnoDB: The age of...the last checkpoint is 8106349, which exceeds the log group capacity 7546061. 2021-03-12T14:54:37.165502...139648846694144) has reserved it in mode exclusive number of readers 0, waiters flag 1, lock_word: 0 Last...原因分析 按经验来推断的话,估计是 last checkpoint 的位置太远,导致 redo log 空间不够用了(8106349 > 7546061)。...log_has_printed_chkp_warning || difftime(time(NULL), log_last_warning_time) > 15)
RocketMQ是以consumer group+queue为单位是管理消费进度的,以一个consumer offset标记这个这个消费组在这条queue上的消...
, the last event read from '..../mysql-bin.000081' at 4, the last byte read from './mysql-bin.000081' at 4.'..., the last event read from '...., the last event read from '..../mysql-bin.000081' at 4, the last byte read from './mysql-bin.000081' at 4.'
来源:力扣(LeetCode) 链接:https://leetcode-cn.com/problems/friendly-movies-streamed-last-month 著作权归领扣网络所有。...解题 # Write your MySQL query statement below select distinct title from Content c, TVProgram tv where
使用场景: 1.tomcat jdbc连接池 2.mysql数据库 3.隔一段时间后就会出现 Communications link failureThe last packet successfully...received from the server was 2,687,887 milliseconds ago之类的错误提示,出现这个问题的原因是使用了无效数据库连接 spring.datasource.mysql.max-idle...=10 spring.datasource.mysql.max-wait=10000 spring.datasource.mysql.min-idle=5 spring.datasource.mysql.initial-size...=5 下面是mysql服务器配置 重点看wait_timeout这个参数跟2,687,887 这个打印信息,出现这个报错信息的原因在于操作mysql数据库时使用了一个无效连接,这个连接为什么无效呢?...原因就在于2,687,887 这个时间是该连接上次操作mysql数据库的时间,由于这个时间超过2592000这个时间,mysql服务端会自动关闭这个连接,但是连接池没有把这个连接废除导致!
我开始想,难道是因为第一个元素选择器设置的背景色覆盖了:last-child的颜色?...& :last-of-type :last-child在刚开始的例子中讲过,这里略,只讲一下:last-of-type选择器:选取在一组兄弟元素中指定元素的最后一个。...例如: 和刚开始的例子一样,使用:last-of-type选择器,即使div元素后有script元素,也可以选择到最后一个div: 因为div:last-of-type选择的是div兄弟元素中的最后一个...:nth-child(n) & :nth-last-child(n) :nth-child(n):选择每个指定元素是其兄弟元素的第n个元素 :nth-last-child(n):选择每个指定元素是其兄弟元素的第...last”字眼的选择器是从后往前数。
last_insert_id() 在正确的情况下返回: 数字类型. 并且大于 0 其中如php mysql函数, mysql_insert_id() 返回值也是一样.
global.index-url https://pypi.tuna.tsinghua.edu.cn/simple python3设置默认源时报错 Traceback (most recent call last...): File "/usr/bin/pip3", line 9, in from pip import main ImportError: cannot import name...'main' 输入命令 sudo /usr/bin/pip3 将 from pip import main if __name__ == '__main__': sys.exit(main()...) 改为 from pip import __main__ if __name__ == '__main__': sys.exit(__main__.
前几天,手动搭建一个mysql主从复制集群,今天在执行过程中,出现如下错误:Error 'Can't drop database 'test'; database doesn't exist'...执行命令:show slave status mysql> show slave status\G; *************************** 1. row ***************...: 0 Last_IO_Error: Last_SQL_Errno: 1008 Last_SQL_Error...可以手动建一个test数据库 stop slave; create database test; start slave; mysql> show slave status\G; **********...: 0 Last_IO_Error: Last_SQL_Errno: 0 Last_SQL_Error:
在前一篇中有设置mysql的触发器时使用样例 mysql> delimiter // mysql> create trigger upd_check before update on account...a-b-c-d','-',2) as f2, split_part('a-b-c-d','-',3) as f3, split_part('a-b-c-d','-',4) as f4; split_last...`split_last`( `str` varchar(255) charset utf8mb4 collate utf8mb4_general_ci ,`delim` varchar(1) charset...('a-b-c-d','-') as f1, split_last('a-b-c-','-') as f2; clean_partitions CREATE DEFINER=`fanruan_dba...INFORMATION_SCHEMA.PARTITIONS where TABLE_NAME =''', table_name,''''); PREPARE stmt FROM @str_sql
有站长找到我,说数据库坏了,访问网站报错如下: Error establishing a database connection 看了下 MySQL 的错误日志,报错如下: Error: Table '.../db_name/table_name' is marked as crashed and last (automatic?)...repair failed 修复很简单,先停止 MySQL:service mysqld stop 进入到 MySQL 数据库的文件存放目录,比如 cd /data/mysql/zhangge_db 然后执行如下命令...: myisamchk --safe-recover -f -r *.MYI 执行完成后,为了保险起见,我们要将文件的权限改回 MySQL 的运行账号(自行查看),比如 mysql: chown -R...mysql:mysql .
其实很多时候我们都能用到css的选择器功能,比如调用N篇文章,想设置奇数行显示一种颜色,偶数行显示一种颜色,然后代码一般都是“foreach”循环语句,不建议直接写在代码里,那么css就能轻而易举的解决这个问题...background:#ddd} :nth-child(3n+1)自定义选取标签,3n+1表示“隔二取一” .talklee li:nth-child(3n+1){background:#ddd} :last-child...选取最后一个标签 .talklee li:last-child{background:#ddd} :nth-last-child(3)选取倒数第几个标签,3表示选取第3个 .talklee li:nth-last-child
: Communications link failure The last packet sent successfully to the server was 0 milliseconds ago...The driver has not received any packets from the server....: Communications link failure The last packet sent successfully to the server was 0 milliseconds ago...The driver has not received any packets from the server....0:04.21 /usr/local/mysql/bin/mysqld --user=_mysql --basedir=/usr/local/mysql --datadir=/usr/local/mysql
默认取值为 last_run_metadata_path 中记录 Path to file with last run time last_run_metadata_path => "/usr/local...mysql://mysql:3306/database?...> "timestamp" # 定时调度,避开凌晨离线任务调度时间 schedule => "*/5 9-23 * * *" statement => "SELECT * FROM...my_table WHERE update_time > :sql_last_value" last_run_metadata_path => "/usr/local/service/logstash.../extended-files/.pro_mysql_2_es_last_run.yml" } } filter { mutate { remove_field => ["@version
MySQL之数据库某表字符集和数据库字符集不一致导致主从复制配置报错1677 mysql数据库中某张表字符集是utf8而my.cnf设置的数据库的字符集是utf8mb4,导致在配置主从复制时,报如下错误...: Last_Errno: 1677 Last_Error: Column 1 of table 'novel.novel_mp_custom' cannot...be converted from type 'tinyint' to type 'int(5)' 原因: 表字符集和数据库字符集不一致导致的 解决过程如下: 主库79查看数据库字符集和报错表的字符集:...mysql> show create database novel\G *************************** 1. row *************************** ...40100 DEFAULT CHARACTER SET utf8mb4 */ mysql> show create table novel_mp_custom\G *****************
mysql5.7设置主从同步 报错如下 Last_IO_Error: Got fatal error 1236 from master when reading data from binary log
MySQL分区表MAXVALUE can only be used in last partition definition错误添加新的分区,报错代码如下:mysql> alter table t1...ADD PARTITION(partition p3 values less than(200));ERROR 1481 (HY000): MAXVALUE can only be used in last...> select partition_name,table_rows from information_schema.partitions where table_name='t1';+--------...> select * from t1;+-----+-------+-------+| id | fname | lname |+-----+-------+-------+| 16 | frank...> insert into t1 values(188,'jack','red');Query OK, 1 row affected (0.00 sec)mysql> select * from t1;
今天在学习MyCat环境搭建的时候,在配置MySql的主从模式,发现slave在配置完毕后,配置的内容全部正确的情况下,报错了? ?...Last_IO_Error: Fatal error: The slave I/O thread stops because master and slave have equal MySQL server...忽然一想,原来是虚拟机的环境都是从一个母机上克隆下来的, 所以虚拟机上面的mysql环境配置内容肯定都相同,所以导致了他们的UUID相同, 然而我们要配置数据库的主从模式必须不能UUID相同, 解决办法...: 在slave虚拟机上,我们把UUID的配置文件删除,然后在重新启动mysql服务就OK了 [root@rebirth ~]# rm -rf /var/lib/mysql/auto.cnf [root
2DD8A8D108E674BCB32D6E32B03492C1 有一个部门表,dept_emp简况如下: 4BF7C729BECEE5D9215DF0C0B22855A0 请你查找所有已经分配部门的员工的last_name...exists `employees` ; CREATE TABLE `dept_emp` ( `emp_no` int(11) NOT NULL, `dept_no` char(4) NOT NULL, `from_date...employees` ( `emp_no` int(11) NOT NULL, `birth_date` date NOT NULL, `first_name` varchar(14) NOT NULL, `last_name...select b.last_name, b.first_name, a.dept_no from dept_emp a inner join employees b on a.emp_no = b.emp_no...select b.last_name, b.first_name, a.dept_no from dept_emp a left join employees b on a.emp_no = b.emp_no