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1.DAYOFWEEK (date), which returns the data time of the week (1 => Sunday, 2 => Monday, 3 => Tuesday, ..., 7 => Saturday). Mysql> Select DayOfWeek (' 2013-06-09 14:00:00 ');+----------------------------------+| DayOfWeek (' 2013-06-09 14:00:00 ') |+-

Selectsubdate (Curdate (), Date_format (Curdate (), '%w ')-1)//Get current date in the Monday of the weekSelectsubdate (Curdate (), Date_format (Curdate (), '%w ')-7)//Get current date on Sunday of the weekThese two sentences are a method that MySQL

Export csv data within three months in PHP, as shown in the following figure: I want to figure out the first day of the month to the last day of the month three months ago. What should I do if I can get the first day of three months? Reply to

MySQL Time processingUsually we have some time to change the demand, such as to count the revenue of a certain period of time, such as to intercept a certain time of year, such as to calculate the day of the week according to a certain date, these

Date and Time functionsThis chapter discusses some functions that can be used to manipulate time values. See section 11.3, "Date and Time type" for valid formats for each time and date type with a range and a specified value. The following example

1, query the current time of month and day secondsMysql> Select Now (); +---------------------+| Now () 2018-03-19 23:12:52 |+---------------------+2. Check the time of three hours before the current timeSubdate (now (), Interval 3

When you use a report tool to design a report, when using a parameter control, sometimes we want some of the parameter controls to not appear when the condition is not met, and then show when the condition is met, and then I'll teach you how to do

For advanced enquiries, see:http://www.w3school.com.cn/sql/Http://www.cnblogs.com/kissdodog/p/4168721.html--------------------string Function---------------------Capitalization conversion ucase (), Upper ()SELECT UCASE (ename) from EMP;SELECT UPPER (

Mainly by the following links to see, after a supplement to fill the http://blog.csdn.net/phiberg/article/details/7672974http://www.cnblogs.com/zeroone/archive/  2010/05/05/1727659.html/* Get current time */select now ();/* 2014-09-04 10:25:15 */*

Mysql and mysql download There are too many functions provided by Mysql, and many of them have been seen before. Don't use them. Someone in the garden made a comprehensive. MYSQL function. I will copy all of the information he has written here, and