# ***************************************************************************** # BASICS # ***************************************************************************** mysqldump -h hostname -u username -p database_name -P port > file.sql # Export database mysql -u username -p database_name < file.sql # Import database SHOW PROCESSLIST; # Show you any queries that are currently running or in the queue to run show status where `variable_name` = 'Threads_connected'; # Show all connected threads show variables like 'max_connections'; # Show maximum number of allowed connections SET GLOBAL max_connections = 150; ## Set new value for maximum connections (no restart needed but for permanent change update my.cnf) GRANT ALL PRIVILEGES ON prospectwith.* TO 'power'@'localhost' WITH GRANT OPTION; # Grant all privileges on database CREATE USER 'newuser'@'localhost' IDENTIFIED BY 'password'; # Create user mysql -u root -pmypassword -e "MY SQL QUERY" &>> query.log & disown # Run SQL query in the background # ***************************************************************************** # CREATE DATABASE/TABLE # ***************************************************************************** # Creating Database CREATE DATABASE databasename; # Creating Table [Table's name should be in plural form (ex. users, menus)] CREATE TABLE tablename, (column1 datatype, column2 datatype, column3 datatype,); # For DATA TYPES check out MySQL's official documentation: # https://dev.mysql.com/doc/refman/8.0/en/data-types.html # ***************************************************************************** # ACCESSING THE DATABASE and TABLES # ***************************************************************************** # Accessing the Database USE database_name; # Accessing a specific table SELECT * FROM tablename # ***************************************************************************** # SELECT (to select any data from any column from the table) # ***************************************************************************** SELECT * FROM tablename # To select every data included from the table SELECT column1, column2, column3 FROM tablename # You can specify certain columns to access data from it. SELECT column1 (AS name) from tablename # To rename a column, we use an alias (AS) and name it as we want.