1. Full backup and incremental backup 1.1 full-scale backupFull-volume data is all the data in the database, and a full backup is the backup of all the data in the database.Back Up all libraries:mysqldump -uroot -p123456 -S /data/3306/mysql.sock -F -
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
MySQL database functions are frequently used in actual operations. Therefore, it is best to have a certain understanding of MySQL database functions. I found this article very well on a website, I have made a special offer for you to share with you
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 |
+ -------------
1. Date Time function
Time Conversion second function: Time_to_sec
Mysql> Select Time_to_sec (' 01:01:01 ');+-------------------------+| Time_to_sec (' 01:01:01 ') |+-------------------------+| 3661 |+-------------------------+1 row in Set (0.00
For operations on string positions, the first position is marked as 1.
ASCII (str)
Returns the ASCII code value of the leftmost character of the string str. If Str is an empty string, returns 0. If STR is NULL, returns NULL.
Mysql> Select ASCII (' 2
From_unixtime () is the time function in MySQLDate is the parameter that needs to be processed (the parameter is a UNIX timestamp), can be a field name, or it can be a Unix timestamp stringThe following '%y%m%d ' is primarily the formatting of the
Mysql Cluster 1: master-slave replication, using mysql-proxy for load balancing Mysql Cluster
There are many mysql Cluster architecture methods, and different architectures are implemented according to different requirements. Simply put, mysql
With such a requirement, we need to get all the data records for a certain period of time, such as news in the last one months, and then sort them in this data collection to see which news has the highest click rate. Now the question is, how to get
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