mysql set multiple columns

MySQL index usage instructions (single-column index and multi-column index), mysql multiple columns 1. Single Column Index In the performance optimization process, selecting the columns to create an index is one of the most important steps. You can

In php, multiple columns of a single database field are displayed (single-field paging and horizontal output), and multiple columns are displayed on multiple pages. In php, fields in a single database are displayed in multiple columns (single-field

Set Change root passwordNote: How to change the root password, about the root user is the MySQL Super administrator user, it is similar to the root user inside the Linux operating system, to distinguish between the root of MySQL and the system root

When mysql processes a unique index, it updates the index. If it does not exist, it should be very common to insert the index. There are many similar articles on the Internet, today I will talk about the problems and methods that may occur when this

Take you 5 minutes to understand MySQL Character Set settings, mysql Character SetI. Content Overview When using MySQL, it is important to understand the concepts of character sets and collation, and the impact of different settings on data storage

One, character set and validation rulesA character set is a set of conformance and encoding, a set of rules that are used to compare characters within a character set, that is, the collation of a character set. MySQL can use the pair of character

Concrete Example 1. PHP Server ComponentsFor beginners, it is recommended to use the integrated server component, which already includes PHP, Apache, Mysql and other services, eliminating the time spent by developers in the tedious configuration

We can use show variables like character to view character encoding in mysql. modify the configuration method in my. ini. Let's take a look at it. Recently, in the mysql database used by the project team, garbled data is inserted. We have summarized

One, MySQL installationInstall MySQL under CentOS Please open: http://www.centoscn.com/CentosServer/sql/2013/0817/1285.htmlIi. several important directories of MySQLMySQL installation is not as if SQL Server is installed by default in a directory,

mysql| Data | Database summary In this chapter, we will focus on how to work with the MySQL database using Structured Query Language (SQL). (2002-08-29-14:11:10) -------------------------------------------------------------------------------- By