mirror of
https://github.com/LeCoupa/awesome-cheatsheets.git
synced 2026-01-28 14:18:12 -08:00
49 lines
2.3 KiB
Bash
49 lines
2.3 KiB
Bash
# *****************************************************************************
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# BASICS
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# *****************************************************************************
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mysqldump -h hostname -u username -p database_name -P port > file.sql # Export database
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mysql -u username -p database_name < file.sql # Import database
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SHOW PROCESSLIST; # Show you any queries that are currently running or in the queue to run
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show status where `variable_name` = 'Threads_connected'; # Show all connected threads
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show variables like 'max_connections'; # Show maximum number of allowed connections
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SET GLOBAL max_connections = 150; ## Set new value for maximum connections (no restart needed but for permanent change update my.cnf)
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GRANT ALL PRIVILEGES ON prospectwith.* TO 'power'@'localhost' WITH GRANT OPTION; # Grant all privileges on database
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CREATE USER 'newuser'@'localhost' IDENTIFIED BY 'password'; # Create user
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mysql -u root -pmypassword -e "MY SQL QUERY" &>> query.log & disown # Run SQL query in the background
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# *****************************************************************************
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# CREATE DATABASE/TABLE
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# *****************************************************************************
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# Creating Database
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CREATE DATABASE databasename;
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# Creating Table [Table's name should be in plural form (ex. users, menus)]
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CREATE TABLE tablename, (column1 datatype, column2 datatype, column3 datatype,);
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# For DATA TYPES check out MySQL's official documentation:
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# https://dev.mysql.com/doc/refman/8.0/en/data-types.html
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# *****************************************************************************
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# ACCESSING THE DATABASE and TABLES
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# *****************************************************************************
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# Accessing the Database
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USE database_name;
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# Accessing a specific table
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SELECT * FROM tablename
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# *****************************************************************************
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# SELECT (to select any data from any column from the table)
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# *****************************************************************************
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SELECT * FROM tablename # To select every data included from the table
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SELECT column1, column2, column3 FROM tablename # You can specify certain columns to access data from it.
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SELECT column1 (AS name) from tablename # To rename a column, we use an alias (AS) and name it as we want.
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