how to use if else in mysql query

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MySQL operation query results case-then-else End usage example

Case has two formats. Simple case function and case search function.--Simple Case functionCase SexWhen ' 1 ' Then ' men 'When ' 2 ' then ' women 'Else ' other ' END--case search functioncase If sex = ' 1 ' Then ' man 'When sex = ' 2 ' Then ' women

MySQL operation query results case-then-else End usage example

Case has two formats. Simple case function and case search function.--Simple Case functionCase SexWhen ' 1 ' Then ' men 'When ' 2 ' then ' women 'Else ' other ' END--case search functioncase If sex = ' 1 ' Then ' man 'When sex = ' 2 ' Then ' women

MySQL Common instructions, java,php programmers, database engineers must. Programmers Xiaoice Common Data collation

MySQL常用指令,java,php程序员,数据库工程师必备。程序员小冰常用资料整理MySQL common commands (for reference)The most common display commands are:1. Display the list of databases.show databases;2. Display the data table in the library:Use MySQL;Show tables;3, display the

MySQL Stored Procedure example. You cannot use begin end in if else. Otherwise, an Error Code: 1064 will be reported.

MySQL Stored Procedure example. You cannot use begin end in if else. Otherwise, an Error Code: 1064 is reported to solve the Error Code: 1064You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the

MySQL Stored Procedure example. You cannot use BEGIN end in if else. Otherwise, an error code: 1064 is reported!

Error code: 1064You have an error in your SQL syntax; check the manual that corresponds to your MySQL Server version for the right syntax to use near The error is reported because the if else statement in MySQL procedure uses the begin end

MySQL builds a series of many instances _ MySQL

MySQL builds a series of multiple instances. The so-called multi-instance is to build and run multiple MySQL instances on one server. each instance uses different service ports and listens through different sockets. physically, each instance has an

Multiple MySQL instances

MySQL builds a series of multiple instances. The so-called multi-instance is to build and run multiple MySQL instances on one server. Each instance uses different service ports and listens through different sockets. Physically, each instance has an

MySQL character set Chinese garbled ultimate solution and MySQL query Chinese problem solution [resend]

MySQL character set ultimate solution [posting]   MySQL, an open-source database, has always been the first choice for small and medium-sized enterprises to build Web applications. In particular, It is a golden partner to cooperate with PHP and

Learn MySQL (UP)

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

MySQL builds multiple series of instances

The so-called multi-instance is to build and run multiple MySQL instances on a server. Each instance uses different service ports and listens through different sockets. Physically, each instance has an independent parameter configuration file and

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