Database Administrator

I have not used Mysql for a long time. Yesterday, my friend had no problem with running a small project on my machine, but reported an internal server error (500) on his machine ), using QQ for Remote Assistance (too slow), it took me half a day to

Recently, I found that the connection to the database in the new column is very slow. I log on to the MySQL database. Mysql> show processlist; | 20681949 | unauthenticated user | 10.10.4.193: 52497 | NULL | Connect | Reading from net | NULL | | 20

Symptom: Use JDBC to insert Chinese fields into the MySQL database, and then open the table to find that the fields are all "?? ", Or garbled. Cause: 1. The default encoding method is not specified when you create a database. As a result, the

I haven't written a program for many years, and now I am unfamiliar with php + mysql database programming. Recently I have recovered again. Of course, I have encountered such a problem at the beginning. Garbled Problem According to previous habits,

As a corporate network manager, I know the important role of databases in enterprise operations. In the market environment where enterprise informatization is becoming more and more in-depth, enterprises have extremely strict requirements on

I encountered many problems when installing MYSQL in the past two days. I found a lot of materials and wrote out the summary. 1. select an appropriate mysql version. Go http://www.mysql.com The latest mysql version At the same time, a version has

I have forgotten the default sysman password when I use a three-tier Oem. Do I need to reconfigure the database? Of course it is not that troublesome. This article provides a simple method to restart the sysman password. Environment:Oracle

Over the past two days, I have been tossing WordPress, upgrading the system, adding various plug-ins, and then setting up the environment at home to start debugging. Everything went smoothly. After using the WordPress Database Backup tool to back up

1. Compile the previous conditions to check whether the following software has been installed. Some of them may not be necessary, but we recommend that you install them all.Apt-get install autoconf automake autotools-dev cpp curl gawk gcclftp

Oracle databases are typical representatives of network databases. You can access the Oracle database over the network. Oracle Database provides a variety of network interconnection solutions, including the structure and driver, its network

Connect to Oracle today error: ORA-18008: can not find the OUTLN solution, the day before yesterday also used well, now no matter query any SQL statement or click list view will pop up the error prompt, busy for a while, finally, the solution is

Today, I received a requirement to establish a replication mechanism for MySQL internationally. This is actually nothing, and the network environment is worse, MySQL can also cope with it. However, a time zone error occurs! The error is as follows:

MySQL does not provide direct variables for deadlock. For Versions later than Version 5.5, performance_shcema can provide detailed information about the lock (but we are still 5.0). For Innodb_lock_monitor, the output of innodb_monitor is always

One of the important features of cmake is that it is independent from the out-of-source compilation function. That is, the compilation can be performed in another specified directory rather than the source directory, this ensures that the source

I. Glossary: 1: Server_uuid: Server ID. When Mysql is started for the first time, a server_uuid is automatically generated and written to the auto. cnf file in the data directory. It is not recommended to be modified. [Root @ mysql5_6 data] #

If you forget about SYSDBA, you can modify the password of SYSDBA. The premise is to find the installation path of Oracle. PWDsid is available in the \ oracle \ product \ 11.2.0 \ dbhome_1 \ database directory. ora file. This is the file that

ASM is a storage product released by Oracle for rac. Although it is set for the cluster environment, we can also use ASM instances to manage disks in a single-host environment. (1) installation and configuration I. Confirm the Linux kernel

InnoDB fully supports ACID transactions, row lock design, MVCC, consistent non-locked reads, and foreign key-> transaction security, and is suitable for OLTP applications (online transaction processing ).Mytrix ., inc. store more than 1 TB of data

In Oracle 10 Gb, there is a single-Table query SQL statement, which does not have a where clause, but simply calculates the maximum and minimum values of a column at the same time.According to our understanding, it should undergo a full index scan,

Connect OTL to the Oracle database in Linux # Include Using namespace std; # Define OTL_ORA10G // indispensable# Include "otlv4.h" // pay attention to the OTL header file location Otl_connect db; Int main (){Otl_connect: otl_initialize ();Try{Db.