mirror of
https://github.com/namibia/awesome-cheatsheets.git
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85 lines
4.3 KiB
Bash
85 lines
4.3 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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# Database and Table Operations
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# *****************************************************************************
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CREATE DATABASE database_name; # Create a new database
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DROP DATABASE database_name; # Delete a database
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CREATE TABLE table_name (column1 datatype, column2 datatype, ...); # Create a new table
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DROP TABLE table_name; # Delete a table
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SHOW TABLES; # Display all tables in the current database
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DESCRIBE table_name; # Show the structure of a table
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# *****************************************************************************
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# Data Manipulation
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# *****************************************************************************
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INSERT INTO table_name (column1, column2, ...) VALUES (value1, value2, ...); # Insert data into a table
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UPDATE table_name SET column1 = value1, column2 = value2, ... WHERE condition; # Update existing data in a table
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DELETE FROM table_name WHERE condition; # Delete data from a table
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SELECT column1, column2, ... FROM table_name WHERE condition; # Select data from a table
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# *****************************************************************************
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# Backup and Restore
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# *****************************************************************************
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mysqldump -u username -p database_name table1 table2 > file.sql # Backup specific tables
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mysql -u username -p database_name < file.sql # Restore specific tables
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# *****************************************************************************
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# User Management and Security
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# *****************************************************************************
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REVOKE privilege_type ON database_name.table_name FROM 'username'@'hostname'; # Revoke privileges from a user
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DROP USER 'username'@'hostname'; # Delete a user
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ALTER USER 'username'@'hostname' IDENTIFIED BY 'newpassword'; # Reset a user's password
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# *****************************************************************************
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# Performance and Maintenance
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# *****************************************************************************
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OPTIMIZE TABLE table_name; # Optimize a table
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ANALYZE TABLE table_name; # Analyze a table for key distribution and storage optimization
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CHECK TABLE table_name; # Check a table for errors
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REPAIR TABLE table_name; # Repair a corrupted table
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# *****************************************************************************
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# Advanced Queries
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# *****************************************************************************
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SELECT ... FROM table1 JOIN table2 ON table1.column = table2.column; # Perform a join operation between two tables
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SELECT ... FROM (SELECT ... FROM table_name) AS subquery; # Use a subquery within another query
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SELECT column, COUNT(*) FROM table_name GROUP BY column; # Group results and use aggregate functions
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# *****************************************************************************
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# System Information
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# *****************************************************************************
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SELECT VERSION(); # Show the current version of MySQL
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SELECT User, Host FROM mysql.user; # List all current MySQL users
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# *****************************************************************************
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# Miscellaneous
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# *****************************************************************************
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SET GLOBAL general_log = 'ON'; # Enable query logging
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SHOW FULL PROCESSLIST; # Show the last queries executed in MySQL
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