MySQL

The size of a single MySQL table is limited. The following describes the restrictions on the size of a single MySQL table. If you have encountered any problems with the size of a single MySQL table, take a look. In earlier versions of MySQL 3.22,

What is the MySQL lock mechanism? This is a problem that many people have mentioned. The following describes the MySQL lock mechanism in detail. I hope you can learn more about the MySQL lock mechanism. Currently, MySQL supports table-level locks

MySQL left join query is a method in connection query. The following describes some questions about MySQL left join query. If you are interested, take a look. The primary table I mentioned here refers to the table in the connection query where MySQL

Multi-field fuzzy query in a single MySQL table refers to fuzzy query of multiple keywords in multiple fields in a single table, but these keywords do not necessarily exist in a specific field. For example, in an existing table, there are three

For the database system, query is the most important function. The following describes how to query cache variables in MySQL. If you are interested in querying cache variables in MySQL, take a look. Explanation of cache variable query in

There are more than one implementation method for querying row numbers in MySQL. The following describes how to use functions to query row numbers in MySQL. If you are interested in this, take a look. MySQL uses functions in MySQL 5 to query row

How should I optimize the MySQL query page? Next, we propose an idea for optimizing MySQL query paging, hoping to help you learn about MySQL query paging. In the case of indexing, the limit m, n speed is enough, but in the case of complex search

Where can I use a single select statement to implement MySQL query statistics? It is too useful. For example, if you want to query the number of people who pass or fail, how can you query it? The simple statement for MySQL query statistics must be

The full-text query method of MySQL is not difficult. The following describes how to implement full-text query of MySQL. It is helpful for you to learn MySQL full-text query. Up to 3.23.23, MySQL began to support full-text indexing and searching.

We are familiar with MySQL strings. The following describes the differences between CHAR and VARCHAR in MySQL strings. We hope this will help you learn MySQL strings. Do not assume that the character type is CHAR in the MySQL database. The

The limit length of a MySQL string does not seem to be important. In fact, it is closely related to the security of the entire MySQL database. It is worth further research and analysis. SQL injection attacks have been widely discussed. However, the

MySQL has many variable types. The following describes MySQL system variables. If you are interested in MySQL System variables, take a look. MySQL can access many systems and connection variables. Many variables can be changed dynamically when the

In MySQL databases, Order by statements are frequently used. However, it is well known that when using this statement, data query performance is often reduced. Because the database records may need to be reordered. In this article, I will talk about

Mysql databaseOfBackupThis makes database operations very simple and ensures the absolute security of databases in mysql databases. If the database is not backed up, the data in the database will be lost, and the staff will not be able to implement

MySQL databaseThe data in is a very important data information and should be kept confidential. once lost, it will cause great losses.Data backupIt is the most important link in the MySQL database operation process. Next we will introduce the

Introduction: mysql databaseIt is a database system with good application. With the development of technology, the workload of mysql database is also very large. At this time, the default number of connections is not enough, this requires increasing

Editor's Note: This is a MySQL performance optimization tutorial. the DBA of a company was originally used to train employees of the company and is now reproduced for everyone to learn and improve. Background and objectives ● Used for employee

The following articles mainly introduce several tips for optimizing MySQL database performance, including selecting the most suitable field attribute and using JOIN) instead of subqueries (Sub-Queries), UNION is used to replace the content of the

If you run the table check/repair program at the same time, you may not wantMySQLThe server and utility access a table at the same time. If both programs write data to the table, it will obviously cause a lot of trouble and even cause unexpected

Now we are working on an interface through differentConnectionString to operate on different databases. To useMysql databaseYou have never used this database before. There are many access and SQL server instances. Through some information on the