✂️ MySQL

Tue, 05 Apr 2016 01:05:15 +0000

(most recent on top)

Show storage engine information (per table)

show engines;

select table_name, engine
from information_schema.tables
where table_schema = 'dbname';

… execute the command below and then run the generated statements

select concat('drop table if exists ', table_name, ' cascade;')
from information_schema.tables
where table_schema = 'database_name';

drop schema dbname;

create database dbname 
default character set utf8 collate utf8_general_ci;

show variables like 'char%';
show variables like 'coll%';

alter database dbname 
default character set utf8 collate utf8_general_ci;

… for each table

alter table tablename 
convert to character set utf8 collate utf8_general_ci;

show grants for username@localhost;

show databases;

Stop using FLUSH PRIVILEGES – I used to be a MySQL DBA for Hire
- No need for doing flush privileges when using “higher level” commands
- Only when directly manipulating the permissions tables with “low level” commands (insert, update, delete) does the flush privileges command need to be done to reload the permissions copy MySQL keeps cached in memory

grant all privileges on `dbname`.* to 'username'@'localhost';

revoke all privileges on `dbname`.* from 'username'@'localhost';

select user, host, password from mysql.user;

rename user 'oldname'@'localhost' to 'newname'@'localhost';