Cacti queries the disk size occupied by the mysql database and returns php modifications. However, with the template configured in cacti, you can create tables in the device and generate data source entries, but there is no returned data and I don't know what the problem is. There is no solution for the moment.I tried to use the script query and script_server methods. Because I still don't know, I don't kno
MySQL reference manual-8. MySQL tutorial-8.3 examples of common queries
This article from: http://linuxdb.yeah.net Translator: Yan Zi
(18:22:34)
8.3 examples of common queries The following describes how to useMySQLExamples of solving som
MySQL recursively queries the current node and its subnode bitsCN.com
MySQL recursively queries the current node and its subnodes
1. table structure
2. query statement
Create procedure Pro_GetUnderOrg (in idd varchar (36) begindeclare levint; set lev= 1; drop table if exists tmp1; create table tmp1
6 commonly used MySQL queries bitsCN.com
Six common MySQL queries
It is an art to query architectural art by using structured query languages to develop correct and effective database problems and commands. In a SELECT query, you can use JOIN, WHERE, and HAVING clauses to analyze and summarize results rows and column
Mysql queries the data of bitsCN.com every other day for one day and one week.
Mysql queries data from one day, one week, and the other day
-- Query a day
Select * from tbl_order where date (tbor_create_time) = curdate ();
Select * from tbl_order where to_days (tbor_create_time) = to_days (now ());
-- Query
Zabbix and MPM monitoring MySQL
Environment DescriptionA: 192.168.1.190, CentOS 6.3, Zabbix Server deployedB: 192.168.1.191, CentOS 6.3, Zabbix Agent, MySQL 5.5.29 (MySQL Slave)
MPM/Zabbix monitoring structure and deployment stepsMPM/Zabbix monitoring structure:Follow these steps to monitor
From: The asynchronous implementation of MySQL query via the co-processObjectiveRecently studied Ben Linders's speech and learned that Facebook's MySQL query can be asynchronous to improve performance. Because Facebook was implemented earlier, they had to hack PHP to achieve it. Now the php5.5, no need to hack can be achieved.For the performance of a Web site, the bottleneck is mostly from the database. A g
Mysql queries small jobs and Mysql jobs
Data PreparationDrop table if exists class;Create table class (Class_no int (2) unsigned zerofill primary key auto_increment comment 'class number ',Class_name varchar (30) not null comment 'class name');Insert into class values (1, 'excellent class ');Insert into class values (2, 'ordinary class ');Drop table if exists stu
Analysis on the compatibility of a MYSQL syntax (using count in queries) bitsCN.com simply uses count and more fields in queries.
Select count (id), id, name from table
It's embarrassing. my environment is 5.5, and the results can be obtained, but it won't work if I run it on the server.
Okay, an error is reported.
#1140-Mixing of GROUP columns (MIN (),
Status = Show status like '% ' [example: Show status like ' Com_select ']variables = Show variables like '% ' [example: show variables like ' query_cache_size ']1. Number of MySQL queries (taken from show status return information)Com_select; Com_update; Com_insert; Com_delete; com_change_db2, query cache space size: query_cache_sizeQuery cache maximum query data set size: Query_cache_limit (variables); (ta
For database administrators, monitoring the database is of great importance, and the open source database has consistently fared poorly compared to commercial database products such as Oracle and SQL Server, but after MySQL launched the Enterprise version, it was Enterprise database administrators who use this Open-source database have brought a gospel: the MySQL Enterprise
Tags: write generated bsp MySQL col alt units should be two kinds ofInput command:show variables like ' slow% ' You can find that Slow_query_log is OFF (default), indicating that the slow query log is not turned on Slow_query_log_file for slow query log file There are two ways to turn on the slow query log Method One: Temporarily open Set Global slow_query_log = on; #没有使用索引的sql将会被记录入慢查询日志 Set Global log_queries_not_using_indexes = on; SQL #查询时间大于等于
= 127.0.0.1 mysqlport = 3306 # Zabbix Server IP Address zabbixserver = 192.168.8. 3 Where the default field is defaulted, the ONEPROXY-VM field must be equal to the hosts name configured in Zabbix-server. Other configurations are based on your own local MySQL environment. Give Zabbix read access to the PID file and the permissions of the MPM logchmod o+r/data/mysql_3306/mysql.pidTouch/var/log/zabbix/fromdualmysqlagent.logChown-r Zabbix:zabbix/var/log
Mysql queries this week, month, quarter, year, mysql quarter
# Querying weekly records
Select * from product_process where WEEKOFYEAR (update_time) = WEEKOFYEAR (now ());
# Querying data for this month
Select * from product_process where MONTH (update_time) = MONTH (NOW () and year (update_time) = year (now ());
# Querying data for the current quarterSelect
Label: Similarly, using the goods table to practice subqueries, the table structure is as follows: All data (cat_id associated with category.cat_id): Category table: Mingoods (test when connecting queries) First, sub-query 1,where sub-query: The result of the inner query as the comparison condition of the outer query 1.1 One item with the largest query ID (implemented using sort + paging) :mysql> SELEC
Tags: Zabbix mysql monitor######################################################Monitor MySQL ( default monitor template is not available, then agentd.conf to open the custom key, write your own script )Add at the end of the zabbix_agentd.conf (note related file paths, and s
MySQL queries data from yesterday, today, 7 days, last 30 days, this month, and last month, and mysqlDuring development or statistics, we may need to count the data of a table. For example, view new articles today and calculate the number of new users this month. There are many similar requirements and it is very common. You can use SQL skills to complete these tasks. I have summarized some of the SQL state
Install and configure MySQLMTOP to monitor MySQL running performance,
I. Environment Description1. Server role
2. System EnvironmentCentOS 6.2 x86_64
3. environment requirements(1) MySQL 5.0 and above (used to store data collected by the Monitoring System)(2) Apache 2.2 and above (WEB server running server)(3) PHP 5.3 or above (WEB Interface)(4). Python 2 (versi
How to locate and kill bad MySQL queries?
Sometimes, the complexity of relational database systems will confuse you, but fortunately, using MySQL tools to manage queries can avoid these complexities. In this tutorial, I will show you how to find and kill any illegal MySQL
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