Basic Mysql partition management operations:
I haven't written a blog for a long time. I have been learning Mysql partition for the past two days. Summary: Mysql supports Horizontal partitioning and does not support Vertical partitioning; Horizontal
Absrtact: Using Binlog Flash-back error operation data.Basically, every programmer working with the database (and probably your colleagues) will have a problem, how to quickly rollback after MySQL misoperation? For example, delete a table, forget to
Absrtact: Using Binlog Flash-back error operation data.Basically, every programmer working with the database (and probably your colleagues) will have a problem, how to quickly rollback after MySQL misoperation? For example, delete a table, forget to
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
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: Summary of date functions and time functions bitsCN.com
Published inWww.sqlstudy.com1. MySQL obtains the current date and time function
1.1 obtain the current date + time (date + time) function: now ()
mysql> select now();+-------------------
MySQL returns the current date and time function summary bitsCN. com1.1 returns the current date + time (date + time) function: now ()
Mysql> select now ();
+ --------------------- +
| Now () |
+ --------------------- +
| 22:20:46 |
+ -------------
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
-----------------------------------------------------------------------------
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
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
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