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ASCII (str)Returns the ASCII value of the first character of the string 'str' (0 is returned when 'str' is an empty string)Mysql> selectASCII ('2 ');-> 50Mysql> select ASCII (2 );->50Mysql> select ASCII ('dete ');-> 100ORD (str)If the string 'str'

MySQL Date and Time FunctionsMySQL Date and Time Functions DAYOFWEEK (date)The return date is the day of the week (1 = Sunday, 2 = Monday ,...... 7 = Saturday, ODBC Standard)Mysql> select DAYOFWEEK ('2017-02-03 ');-> 3WEEKDAY (date)Returns the date

String functions1.ASCII (str)Returns the ASCII value of the first character of the string str (str is empty when the string returns 0)SELECT ASCII (' 2 ');->502.ORD (str)If the string str first is a single byte, returns the same value as the ASCII ()

DAYOFWEEK (date)The return date is the day of the week (1= Sunday, 2 = Monday,...... 7= Saturday, ODBC Standard)Mysql> Select DAYOFWEEK (' 1998-02-03 ');3WEEKDAY (date)The return date is the day of the week (0= Monday, 1 = Tuesday,...... 6=

DAYOFWEEK (date)The return date is the day of the week (1= Sunday, 2 = Monday,...... 7= Saturday, ODBC Standard)Mysql> Select DAYOFWEEK (' 1998-02-03 ');3WEEKDAY (date)The return date is the day of the week (0= Monday, 1 = Tuesday,...... 6=

DAYOFWEEK (date)The return date is the day of the week (1= Sunday, 2 = Monday,...... 7= Saturday, ODBC Standard)Mysql> Select DAYOFWEEK (' 1998-02-03 ');3WEEKDAY (date)The return date is the day of the week (0= Monday, 1 = Tuesday,...... 6=

MySQL Date time function encyclopediaDAYOFWEEK (date)The return date is the day of the week (1= Sunday, 2 = Monday,...... 7= Saturday, ODBC Standard)Mysql> Select DAYOFWEEK (' 1998-02-03 ');3WEEKDAY (date)The return date is the day of the week (0=

DAYOFWEEK (date)The return date is the day of the week (1= Sunday, 2 = Monday,...... 7= Saturday, ODBC Standard)Mysql> Select DAYOFWEEK (' 1998-02-03 ');3WEEKDAY (date)The return date is the day of the week (0= Monday, 1 = Tuesday,...... 6=

String functionsASCII (str)Returns the ASCII value of the first character of the string str (str is empty when the string returns 0)Mysql> Select ASCII (' 2 ');50Mysql> Select ASCII (2);50Mysql> Select ASCII (' dete ');100ORD (str)If the string str

Latex generation of reference documents BibTeX is a way of using the database to manage the reference procedure, which is used to coordinate latex reference processing. The BibTeX file has a suffix named. Bib. Let's take a look at an

MySQL Date time function encyclopediaDAYOFWEEK (date)The return date is the day of the week (1= Sunday, 2 = Monday,...... 7= Saturday, ODBC Standard)Mysql> Select DAYOFWEEK (' 1998-02-03 ');3WEEKDAY (date)The return date is the day of the week (0=

Latex Generation References BibTeX is a database-using approach to managing reference procedures for coordinating the reference processing of latex. The suffix name for the BibTeX file is. Bib. Let's look at an example: @article {GETTYS90,Author = {

View the last MySQL modification time for a tableSELECT table_name,update_time from Information_schema.tables where table_schema= ' database_name ';By viewing the last updated time of the table in the database.MySQL Date time function encyclopedia

Common regular expression matching in php. [Php] functionpregPN ($ test) {** Match mobile phone number rules: basic mobile phone number format: first three digits: Mobile: 134-139147150-152157-159182187188 Unicom: 130-132155-[php] Function pregPN ($

How is the compound assignment operator + = computed ?, Value assignment operator This article Reprinted from: http://tanlan.blog.51cto.com/3450625/1575936 Question: short s1 = 1; s1 = s1 + 1; What's wrong? short s1 = 1; s1 +=1; What's wrong? At

TCPDUMP introduction in traditional network analysis and testing technologies, sniffer is the most common and important technology. Sniffer is designed for network analysis by network administrators and network programmers. Network administrators

4.1postfix configuration file structure the postfix configuration file is located in etcpostfix. After installing the postfix, we can run the ls command to view the postfix configuration file: [root @ mailpostfix] # lsinstall. cfmain. cfmaster.

Advanced tcpdump usage Author: Lin Haifeng Http://blog.csdn.net/linyt [*] For reprinting, please indicate the author. Please refer to this document for commercial purposes. Enter man tcpdump in Linux and the following content will be displayed at

Every time you use string mode matching, you always have to go through the instructions on the Lua official website. There is no detailed description on the Internet, and many friends have asked me about the content, in fact, there are three

How to use: Cat [-ABEENSTTUV] [--help] [--version] FileNameDescription: Connect the file string to the basic output (screen or add > FileName to another file)Parameters:-N or--number the number of rows for all outputs starting from 1-B