07-SQLite like, wildcard (%,-, [char list], [^ char list], [! Char list]), 07-sqlitecharI. Overview of like
The like operator is used to search for the specified mode syntax in the where clause: select column_name (s) from table_name where column_name likepattern;
2. Select data whose addr starts with "s" from the persons Table
Syntax: select * from persons where addr like's % '; Note: The above % is a wildc
In IIS 6.0, there are two settings that have always puzzled me. Although they have been used in projects, I always feel that I have a vague understanding of them, that is, "application ".
Program Extension and wildcard application ing ".
A few days ago, using the gap between projects, I checked some information on the Internet, combined with the applications in my project, I had some preliminary understanding of these two settings, and now I have
Today, I suddenly think of a question: what happens when the input parameter of the command line program is a wildcard (such as./A. out? Is the input parameter * obtained by the program?
Source code:
#include
Execution result:
$ ls111.txt 2byte.txt a.out main.c minicom.txt src
$ ./a.out *argc: 7argv[0]: ./a.outargv[1]: 111.txtargv[2]: 2byte.txtargv[3]: a.outargv[4]: main.cargv[5]: minicom.txtargv[6]: src
$ ./a.out *.txtargc: 4argv[0]: ./a.outa
Note: The Linux wildcard conforms to the Three Musketeers (grep,awk,sed) Regular expression is not the same, therefore, the meaning of the Representative is alsoThere's a big difference.Wildcard characters General user commands bash environment, while Linux regular expressions are used for grep,sed,awk scenes.*-wildcard character, which represents any (0 to more) characters? -
Wildcard characters in the map path
Sometimes, you want all paths under a directory to have access to the same servletAt this point, you can use the wildcard character in the path of the servlet map *
Wildcard formats are available in two formats *. extension
Like what*.do, matches all URL address formats with. Do ending AS/*
Like what/abc/*, match all URL ad
Tags: Distinguishing tricks matching strong IMG Server product not accessIV. filtering data with wildcard characters1. Like fuzzy search2,% 0 1 + charactersSELECT * FROM Products WHERE prod_name like ' fish% 'Case-sensitive, arbitrary position, any number of times usedSELECT * FROM Products WHERE prod_name like '%bean bag% '3, _ Underline: match a single characterSELECT * FROM Products WHERE Prod_name "__ inch teddy Bear '4, [] square brackets: Only S
Tags: SQL contains ESC the first representation of not SEL and specified --Wildcard characters: _,%, [], ^ --_ denotes any single character Surname Zhang, two words. SELECT * from mystudent where fname like ' Zhang _ ' --surname Zhang, three words SELECT * from mystudent where fname like ' Zhang __ ' --% matches any number of arbitrary characters --regardless of the number of words, as long as the first character is ' Zhang ' on the query out SELECT
Introduction to Linux Shell wildcard, metacharacters, escape character usagesWhen it comes to shell wildcard characters (wildcard), they are often used when used. Here is an example:
1
1234
[[emailprotected] ~/shell]$ lsa.txt b.txt c.old#2
1234
[[emailpr
Today Stroll Q Group met a netizen ask questions:The problem is that he needs to find the number of each containing sub001 in the element where the ID is the beginning of the Sch.such as: id:sch002, sch033 div elements, and so on the following numbers are random, the inside will contain sub001 elements, the number of different; the first netizen is to want to use for the loop to solve, will undoubtedly recruit Because the first loop volume is large (because you cannot predict how small the numbe
In Apache, the virtual host is configured with wildcard domain name resolution ServerAlias. 1. multiple domain names are supported, for example, mail.linuxfly.org, smtp.linuxfly.org, and pop3.linuxfly.org are directed to the same virtual host, which can be written as www.2cto. comServerNamemail. linu... in Apache, the virtual host is configured with wildcard domain name resolution ServerAlias. 1. multiple d
MBGHttp://www.mybatis.org/spring/apidocs/reference/org/mybatis/spring/SqlSessionFactoryBean.htmlThese days build a simple framework for spring4.1.2+mybatis3.2.8.Discover MyBatis's Sqlsessionfactorybean can configure the Typealiasespackage property to automatically alias domain.If my domain is under a different package, then this configuration does not support wildcard scan package path? The following modifications:Before Retrofit: Applicationcontext.x
1. Action DevelopmentSeveral ways to develop(1), inherited from the Actionsupport, (if using struts data validation work, you must use this function, because actionsupport to achieve data validation interface)public class Useraction extends actionsupport{}(2), implement the action interface, the content of the interface is as follows. (There are five constants and one method)Pubic interface action{public static final String success= "Success"; public static final String none= "NONE"; publi
The where comparison conditions are as follows:
Equal to: =,
Including: In, not in exists, not exists
Range: between... and, not between... and
Matching Test: Like, not like null test: Is null, is not null
Boolean links: And, or, not
Wildcard: In the WHERE clause, the wildcard is used with the like condition.
In ORACLE: % (percent): represents any number of characters, or may have no characters at all.
_ (
Wildcards and regular expressions are easy to confuse. First, you must understand that the two are different. I personally think that Wildcards are used in shell commands (such as file name-related operations) in Linux, the regular expression is used to search and replace strings in text content. Wildcards are supported by the Linux system, while regular expressions are used in the vim editor or awk.ProgramThese text processing tools become powerful just because they support regular expressions.
If your server only supports one website, do not configureIf there are multiple virtual hosts, the website with the wildcard domain name should be used as the default virtual host.Set the server to support wildcard domain names.Serveradmin [email protected]DocumentRoot: the Server Directory of your supesite ProgramServername your domain name. comServeralias *. Your Domain Name. com
Configure
A wildcard character in a Java generic can directly define the parameters of a generic type. Instead of defining the function as a generic function. Public classGenericstest { Public Static voidMain (string[] args) {ListNewArraylist(); ListNewArraylist(); ListNewArraylist(); Name.add ("Icon"); Age.add (18); Number.add (314); //Getupernumber (name);//1Getupernumber (age);//2Getupernumber (number);//3 }Wild
Recently, in the shell, I tried to invoke MySQL's query results, but there was a surprising result.This is the table data in MySQLA SQL statement is stored in this table to separate the statement from the shell for execution.Execution results are not consistent with the results of the SQL query as expectedAnd there was this strange result.Carefully analyze the results in the diagram, the SQL statements stored in the Lenovo table are select * from Testsql;It seems that "*" is missing, and then lo
Wildcard characters are * and? , a wildcard is handled by the shell$ ls *.txt Find all created txt text$ touch adsfasf.txt Wergif.txt Create two files$ touch Love_{1..10}_linux.txt Create 10 files at a time after return, write 10 names on the back 1.txt 2.txtShell* Match 0 or more characters? Match any one character[List] matches any single character in the list[!list] matches any single character in the li
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