if else condition in mysql select query

Where Condition Query The code is as follows SELECT * FROM news where DATE (adddate) between ' 2011-04-20 '-INTERVAL 5 day and ' 2011-04-20 ' + INTERVAL 5 day SELECT * FROM news where DATE (adddate) in (' 2011-04-20 ', ' 2011-04-15 ', ' 2011-04-2

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

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

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

The where condition query code is as follows: select * fromnewswhereDATE (adddate) between2011-04-20 The where condition query code is as follows: select * from news where DATE (adddate) between '2017-04-20 '-INTERVAL 5 DAY and '2017-04-20' +

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

Php query mysql multi-condition judgment output display background: query the output of each field value from mysql and display the field values that meet the condition in red according to the condition. Condition: 1. if syntime is less than the

Where Condition Query The code is as follows Copy Code SELECT * FROM news where DATE (adddate) between' 2011-04-20 '-INTERVAL 5 day and ' 2011-04-20 ' + INTERVAL 5 daySELECT * FROM news where DATE (adddate) in (' 2011-04-

To implement multi-condition query, if the value is 0, it is not limited to any conditions. how can I use SQL? for example, if a certain type of store in a region is not limited to a Chinese query, the where Region value is not required, but only

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