MySQL Cheatsheet Guide and Tutorial

Create Database:

create database yourdbname;

Show All Databases:

show databases;

Change Database:

use mysql;



Drop / Delete a MySQL Database:

drop database nameofyourdatabase;


mysql> drop database cardb;
Query OK, 1 row affected (0.10 sec)

How To Delete a Table in MySQL:

DROP table yourtablename;

How To Delete All Data From a Table in MySQL:

DELETE FROM tablename;

How To Delete Selective Data From A Table in MySQL:

DELETE FROM tablename WHERE ID > 25;

Just add the where clause according to a column inside the table EG ID, or WHERE username = "someuser@hello.com"
 

How To Dump The Table Structure SQL Code:

show create table yourtablename;

View tables in database:

show tables;

View table structure:

describe yourtablename;

How To Change a Column Field:

Make sure you edit what is in bold to suit your table name, column name and type (eg. int, varchar, text).

alter table yourtable modify column columname int;

 

Create a new user and password for your database:

myfirstdb is the name of your database and the .* grants the same privileges to all tables (you could fine tune this by replacing the * with a table name).

yourusername is the username

yourpassword is the password

After grant are the privileges, if you want to give them full access you could just use "GRANT ALL" or if you want to restrict them to only reading you could just use "GRANT SELECT" and any other number of options that meet your needs for security.

GRANT SELECT, INSERT, DELETE on myfirstdb.* to yourusername@localhost IDENTIFIED BY 'yourpassword';


Tags:

mysql, cheatsheet, tutorialcreate, database, yourdbname, databases, delete, nameofyourdatabase, cardb, query, ok, sql, yourtablename, column, edit, bold, eg, int, varchar, text, alter, yourtable, modify, columname, user, password, myfirstdb, grants, privileges, replacing, yourusername, username, yourpassword, quot, restrict, select, insert, localhost, identified,

Latest Articles

  • ssh Too many authentication failures not prompting for password
  • LightDM Mint Ubuntu Debian won't start errors Nvidia Graphics
  • WARNING: Unable to determine the path to install the libglvnd EGL vendor library config files. Check that you have pkg-config and the libglvnd development libraries installed, or specify a path with --glvnd-egl-config-path. Linux Ubuntu Mint Debian E
  • How To Upgrade Linux Mint 18.2 to 18.3 to 19.x and 20.x
  • MP3s Won't Play / ID3 Version 2.4 Issues in Cars and Other MP3 Players/CDs/DVDs Solution
  • LXC Containers LXD How to Install and Configure Tutorial Ubuntu Debian Mint
  • GlusterFS HowTo Tutorial For Distributed Storage in Docker, Kubernetes, LXC, KVM, Proxmox
  • Ubuntu Mint audio output not working pulseaudio "pulseaudio[13710]: [pulseaudio] sink-input.c: Failed to create sink input: too many inputs per sink."
  • How To Shrink Dynamically Allocated VM QEMU KVM VMware Disk Image File
  • How To Enable Linux Swapfile Instead of Partition Ubuntu Mint Debian Centos
  • 404 Not Found [IP: 151.101.194.132 80] apt update Debian 11 Bullseye Solution The repository 'http://security.debian.org bullseye/updates Release' does not have a Release file.
  • WARNING: Can't download daily.cvd from db.local.clamav.net freshclam clamav error solution
  • (firefox:9562): LIBDBUSMENU-GLIB-WARNING **: Unable to get session bus: Failed to execute child process "dbus-launch" (No such file or directory) Solution
  • Debian Mint Ubuntu Which Package Provides missing top, ps and w Solution
  • Vbox Virtualbox DNS NAT Network Mode NOT working
  • Docker Tutorial HowTo Install Docker, Use and Create Docker Container Images Clustering Swarm Mode Monitoring Service Hosting Provider
  • Zoom Password Error 'That passcode was incorrect' - Solution Wrong Passcode Wrong Meeting Name
  • How To Startup and Open Remote/Local Folder/Directory in Ubuntu Linux Mint automatically upon login
  • How To Reset Windows Server Password 2019, 2022, 7, 8, 10, 11 Recovery and Removal Guide Using Linux Ubuntu Mint Debian
  • How To Create OpenVPN Server for Secure Remote Corporate Access in Linux Debian/Mint/Ubuntu with client public key authentication