Tag:wildcard

  • Android Foundation Series (1) Java generics

    Time:2021-6-14

    sketch Java generics is a new feature introduced in j2se1.5. Its essence is parameterized type. That is to say, the operated data type is specified as a type parameter. This parameter type can be used in the creation of classes, interfaces and methods, which are called generic class, generic interface and generic method respectively.Let’s understand […]

  • MySQL regular expression like wildcard

    Time:2021-6-6

    Some characters of extended regular expressions are: “. matches any single character.A character class “[…]” matches any character within square brackets. For example, “ABC” matches “a”, “B” or “C”. To name a range of characters, use a “-“[ A-Z] “matches any lowercase letter, and” [0-9] “matches any number.“*” matches zero or more things in front […]

  • Linux search command summary – where is, which, locate, find, grep

    Time:2021-5-29

    1、 Command search commandwhereisAndwhich 1. Where is command Search the path of the command and the location of the help document option -b: Find only executable files -m: Search for help files 2. Which command Search command location and alias 3. Extension Whatis queries what functions a command performs 2、 File search commandlocate 1. Introduction […]

  • Examples of using wildcards in SQL Server

    Time:2021-4-1

    In some cases, being familiar with the use of SQL Server wildcards can help us solve many problems simply. –Use_ Operator to find a three letter name ending with an in the person table USEAdventureWorks2012; GO SELECT FirstName, LastName FROM Person.Person WHERE FirstName LIKE’_an’ ORDER BY FirstName; —Use the [^] operator to find all people […]

  • Today’s knowledge sharing: SQL wildcard

    Time:2021-3-12

      Wildcards can be used to replace any other character in a string. In SQL, wildcards are used with the SQL like operator. SQL wildcards are used to search for data in a table. In SQL, you can use the following wildcards:   Wildcard description %Replace 0 or more characters _ Replace one character Any […]

  • CentOS 7 MySQL 5.7 master slave only synchronizes partial libraries or tables

    Time:2021-2-27

      There are two ways to synchronize partial data The master only sends the required data; Advantages: the relay log is small; if there are multiple slave databases, it only needs to be controlled in the master database Disadvantages: it’s troublesome to modify midway, and you can’t control the synchronized table Slave only receives what […]

  • What should be paid attention to when using wildcard in Ren command

    Time:2021-2-26

    1、 Ren full file name * specifies any character or continuous string in the full file name. ExtensionChange the file name to: from the beginning of the original file name to the specified character (string). ExtensionFor example:10. C for Ren 10. PDF * 0. CRen 10. PDF * P.C gets 10. P.CRen 10. PDF * […]

  • Using MMV command to batch modify file name

    Time:2021-2-13

    stayLinuxUsing MV incommandYou can rename or move files and directories, but it does not support renaming multiple files at once. This paper introduces the use of MMV, using wildcard mode to move / copy / append / link multiple files Environmental Science Centos7.7 Install MMV By default, there is no MMV installation package in the […]

  • Generating / run / initramfs caused by power failure of CentOS 7/ rdsosreport.txt problem

    Time:2021-1-29

    Generating / run / initramfs caused by power failure of CentOS 7/ rdsosreport.txt problem Physical power failure sometimes occurs generating “/run/initramfs/rdsosreport.txt” entering emergencymode. exit the shell to continue type “journalctl” to view system logs. you might want to save “/run/initramfs/rdsosreport.txt” to a usb stick or /boot after mounting them and attach it to a bug […]

  • SQL Server special character query and use of escape

    Time:2021-1-19

    An old project of the company, SQL Server In fuzzy query, the query condition contains, and then the query result is always empty If there is no character after escape character in like mode, the mode is invalid and like returns false. If the character after the escape character is not a wildcard, the escape […]

  • Explain SQL wildcard in detail

    Time:2021-1-17

    Wildcards can be used to replace any other character in a string. SQL wildcard In SQL, wildcards are used with the SQL like operator. SQL wildcards are used to search for data in a table. In SQL, you can use the following wildcards: wildcard describe % Replace 0 or more characters _ Replace one character […]

  • Redis in docker

    Time:2021-1-14

    1. Enter the docker’s redis docker exec -ti [CONTAINER ID] redis-cli 2. Verify the password before performing the operationAuthentication required(if you configured it in config) auth 12345678 3. You can use wildcards to view the key and search according to the key* ?etc. keys * keys dis* 4. Delete key del key [key … ] […]