MySQL 5.7 enhances root user login security

MySQL 5.7 enhances root user login security After MySQL5.7 is installed, a random password will be generated in the root directory when it is started for the first time. The file name is . Mysql_secret Log on with a random password, and then use

MySQL database startup and Shutdown

MySQL database startup and Shutdown MySQL database server usually refers to mysqld, while command line mysql is a mysql client program. These two concepts are often confusing. Generally, the mysql server is started to start the mysqld process. After

The 0RA-01400 error is reported when the materialized view is refreshed.

The 0RA-01400 error is reported when the materialized view is refreshed. Background: materialized view is one of the three major tools for data warehouse refresh. In actual work, it is used for data extraction on heterogeneous platforms. Today,

About the locks in the MySQL InnoDB Storage Engine

About the locks in the MySQL InnoDB Storage Engine Recently, I encountered many lock problems. After solving these problems, I carefully read the books about locks and sorted them out as follows: 1. Lock type The Innodb Storage engine implements the

Clone a database through RMAN on a different machine

Clone a database through RMAN on a different machine When RMAN is used for replication, RMAN will connect to the target database and the secondary instance. If catalog backup is used, it will also connect to the recovery directory. When RMAN

RMAN -- Differences Between obsolete and expired

RMAN -- Differences Between obsolete and expired If you can understand the sources of the two States, You can naturally understand the differences; EXPIRED status: This status is related to the crosscheck command. The crosscheck backup command

Build MongoDB Service Based on CentOS 6.5 Operating System

Build MongoDB Service Based on CentOS 6.5 Operating System MongoDB is a non-relational database (NoSQL) that is very popular in the IT industry. Its flexible data storage method is favored by current IT practitioners. MongoDB implements the

MySQL disable generating Log File mysql-bin.000001

MySQL disable generating Log File mysql-bin.000001 In a MySQL database, mysql-bin.000001, mysql-bin.20.02 files are database operation logs, such as UPDATE a table, or DELETE some data, even if the statement does not match the data, this command

Whether the maximum number of connections is set in Oracle or an error is returned

Whether the maximum number of connections is set in Oracle or an error is returned There are 1100 data records to be updated, and an error is reported during connection. ORA-12518, TNS: listener cocould not hand off client connection According to

Install MariaDB database using yum in CentOS

Install MariaDB database using yum in CentOS Because there is no MariaDB repository on CentOS by default, you need to install rep first.Step 1. Generate a repo File(1) create a new repo File# Nano/etc/yum. repos. d/MariaDB. repo(2) Add

Install Oracle 11g in RedHat Linux 6.0

Install Oracle 11g in RedHat Linux 6.0 Steps for installing Oracle in Linux Preparations before installation Transmit oracle to the root directory through ssh (this installation is under VMware) Installation Package for Linux for Oracle 11g RedHat 6.

How to install MariaDB10.0.X in the latest version in Linux

How to install MariaDB10.0.X in the latest version in Linux 1. Linux installation environment CentOS7-64 bit, latest version: MariaDB10.0.14 2. Linux terminal command line Create a file: vim/etc/yum. repos. d/MariaDB. repo File Content: #

Problems encountered during upgrading MySQL 5.1.61 to 5.6.19 in CentOS 6.3 and Their Solutions

Problems encountered during upgrading MySQL 5.1.61 to 5.6.19 in CentOS 6.3 and Their Solutions Environment: MySQL 5.1.61 Operating System: CentOS 6.3 Objective: To upgrade to MySQL 5.6.19 First, yum is not feasible. because the yum source is not

Oracle trigger troubleshooting example

Oracle trigger troubleshooting example Routine checks on the AWR Report of the database. An update statement is executed multiple times for over 30 seconds each time. This SQL statement is very simple, that is, modifying data based on primary key

MySQL deletes anonymous users to ensure login security

MySQL deletes anonymous users to ensure login security Many MySQL programs use the anonymous logon function. After installing MySQL, you can log on to the database. This is basically nothing for MySQL, but this login method is definitely not

MySQL user addition Error

MySQL user addition Error How to solve the problem when adding a user to MySQL For example, add a user Insert into mysql. user (Host, User, Password) values ("localhost", "test", password ("1234 ")); Error: ERROR 1364 (HY000): Field 'ssl _

How to compile and install the MariaDB database in Linux

How to compile and install the MariaDB database in Linux This article describes how to compile and install the MariaDB database in Linux. For more information, see. Note: Operating System: CentOS 5.10 32-bitMariaDB: mariadb-5.5.33aMariaDB database

Configure the MySQL server for Master-master Replication

Configure the MySQL server for Master-master Replication StatementAuthor: Last Night starsBlog: http://yestreenstars.blog.51cto.com/This article was created by myself. If you need to reprint it, please indicate the source. Thank you for your

Set the size of the Shared Pool in Oracle

Set the size of the Shared Pool in Oracle In Oracle 10g or 11G version, how to properly set the shared pool size has a great impact on the performance of Oracle databases. The size setting rules of the Shared Pool are as follows: 1. Check the

New Features of Oracle 11g virtual column partitioning

New Features of Oracle 11g virtual column partitioning There is a need: a document table should be partitioned by month. If it is on Oracle 10 Gb, only one field can be added. It will be different after the Oracle 11g. You can use virtual column

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