Mysql function usage record (1) -- DATEDIFF, CONCAT, datediffconcat
So far, I have not used Mysql functions in a unified way, and I have used them all before learning. Recently, I began to learn about Linux, so in order to prevent the Mysql
So far, the individual to MySQL function has not been unified learning to use, are used to learn. And recently began to learn Linux, so in order to prevent the end of this period, the MySQL function encountered during this phase of forgetting, began
Mysql query today, yesterday, last 7 days, last 30 days, this month, last month data, mysql January
Recently, the data record query function for the current month was used in the project. The original idea was to construct a period of time in the
MySQL date data type and time type usage summary MySQL date type: Date format, storage space occupied, date range comparison.
Date type storage space date format date range
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MySQL date type: Date Format, storage space occupied, and date range comparison.Date type storage space date format date range-----------------------------------------------------------------------------------Datetime 8 bytes YYYY-MM-DD hh: mm: SS 10
Detailed description of mysql to obtain the current date and format, detailed description of mysql current date
MySQL obtains the current date and Date Format
Get system date: NOW ()
Format date: DATE_FORMAT (date, format)
Note: date: Time
MySQL obtains the current date and time stamp function bitsCN.com
MySQL returns the current date, time, and timestamp.
1.1 obtain the current date + time (date + time) function: now ()
Mysql> select now ();
+ ------- +
| Now () |
+ ------- +
| 22:2
This article consists of three parts, collecting several methods for processing MSSQL datetime on the Internet. Here, we will sort the data according to my collection order.
Part 1: SQL statistics for this month and this weekStatistics for this
Oracle and Mysql time formatting 1. Oracle formatting time: Oracle obtains the current date and Date Format
Get system date: SYSDATE () format Date: TO_CHAR (SYSDATE (), 'yy/MM/DD HH24: MI: SS) or TO_DATE (SYSDATE (), 'yy/MM/DD HH24: MI: SS) format
MySQL timestampdiff () functions are much more powerful than datediff () functions. datediff () can only calculate the number of days for the difference between two dates.
Mysql common date addition and subtraction functions and instance
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