mysql find duplicates

This article mainly introduces some methods to process various duplicates in MySQL, including repeated processing of tables and query results, for more information, see tables or result sets that contain duplicate records. Sometimes it is allowed,

Find slow SQL statements in MySQL and mysqlsql statements How can I find slow SQL statements in mysql? This may be a problem for many people. MySQL uses slow query logs to locate SQL statements with low execution efficiency. When the --

This article describes how to use the MySQL database partition function. the difference and connection between MySQL table shards and partitions are described in detail. For more information, see Zero: What is database partition?Let's talk about

MySQL database partition function tutorial, mysql tutorial Zero: What is database partition?Let's talk about what is a database partition. Take mysql as an example. The data in the mysql database is stored on the disk as a file, which is stored

A basic tutorial on querying logs and slow query logs in MySQL, I. query logs Query all the queries in MySQL by using "-- log [= file_name. Because all the queries, including all the select statements, are recorded, and the size is relatively large,

Objective In order to ensure consistent integrity of data, there is a locking mechanism in any database. The quality of locking mechanism should be directly thought of the concurrent processing ability and performance of a database system, so the

MySQL data recovery case after truncate misoperation, mysqltruncate The actual online scenario is complicated. At that time, the truncate and delete operations were involved. It was confirmed that more than 70 thousand rows of data were lost. when

Objective MySQL is a commonly used open source database products, is usually the first choice for a free database. Checked the NPM list and found that Nodejs has 13 libraries to visit Mysql,felixge/node-mysql seems to be the most watched item, I

Common commands for MySQL database operations and Common commands for mysql Common commands for MySQL database operationsDOS Connection database1. Install MySQL to configure the environment2. Run the cmd command. net start mysql3. Find the root

Set Change root passwordThe default is no password after installing MySQL (mysql5.7 will randomly generate a root password), you need to manually create a password for the root administrator of MySQLWhen I first use MySQL, there is no MySQL command,