mySQL Commands & Syntax Examples Note: Some of the commands listed below require root access.
DescriptionCommand Syntax
Create mysql 'root' passwordSET PASSWORD FOR root@localhost=PASSWORD('password_wanted');   Must have root access.
Create user access for specific DatabaseRun this command from command line as root 'mysql_setpermission'   Must log in as root
Change users passwordSET PASSWORD FOR user_name@localhost=PASSWORD('password_wanted');   Must log in as root
Create a database on the sql server:create database [databasename];
List all databases on the sql server:show databases;
Find all city records starting with HouSELECT * FROM [table_name] WHERE [City_Field] LIKE 'Hou%';
Find any name records containing arySELECT * FROM [table_name] WHERE [NameField] LIKE '%ary%';
Show a users access to what DB(s)show grants for dcl@localhost;   Showing some users may require root login.
Find Name of Kat*SELECT * FROM [table_name] WHERE [Name_Field] LIKE 'Kat%';
Update record(s) matching criteriaUPDATE [table_name] SET mail = '666 Dland' WHERE [fname_field] = 'Dan' AND [lname_field] = 'Booley';
Delete complete table from database.drop TABLE [actual_name_of_table];
Delete record containing...DELETE FROM [table_name] WHERE Customer_ID = 'DCL012';
Add a new column to a database:alter table [table name] add column [new column name] varchar (20);
Change column name:alter table [table name] change [old column name] [new column name] varchar (50);
Make a column bigger:alter table [table name] modify [column name] VARCHAR(3);
Delete a column:alter table [table name] drop column [column name];
Update record:UPDATE [Table_Name] SET city = 'Houston' WHERE Customer_ID = 'DCLLAB';
Update record:UPDATE [Table_Name] SET phone = '713-777-7777' WHERE Customer_ID = 'DCLLAB' AND city = 'Houston';
To login (from unix shell) use -h only if needed.: [mysql dir]/bin/mysql -h hostname -u root -p
Switch to a database:use [db name];
To see all the tables in the db:show tables;
Returns column info about a table:show columns from [table name];
To see database table fields & formats:describe [table name];
To delete a db:drop database [database name];
To delete a table:drop table [table name];
Show all data in a table:SELECT * FROM [table name];
Show certain selected rows: SELECT * FROM [table name] WHERE [field name] = "whatever";
Show all records containing the name "Bob" AND the phone number '3444444':SELECT * FROM [table name] WHERE name = "Bob" AND phone_number = '3444444';
Show all records not containing the name "Bob" AND the phone number '3444444' order by the phone_number field:SELECT * FROM [table name] WHERE name != "Bob" AND phone_number = '3444444' order by phone_number;
Show all records starting with the letters 'bob' AND the phone number '3444444':SELECT * FROM [table name] WHERE name like "Bob%" AND phone_number = '3444444';
Join tables on common columns select lookup.illustrationid, lookup.personid,person.birthday from lookup
left join person on lookup.personid=person.personid=statement to join birthday in person table with primary illustration id;
Switch to the mysql db. Create a new user:INSERT INTO [table name] (Host,User,Password) VALUES('%','user',PASSWORD('password'));
Change a users password.(from unix shell):[mysql dir]/bin/mysqladmin -u root -h hostname.blah.org -p password 'new-password'
Change a users password.(from MySQL prompt):SET PASSWORD FOR 'user'@'hostname' = PASSWORD('passwordhere');
Switch to mysql db.Give user privilages for a db:INSERT INTO [table name] (Host,Db,User,Select_priv,Insert_priv,Update_priv,Delete_priv,Create_priv,Drop_priv) VALUES ('%','db','user','Y','Y','Y','Y','Y','N');
To update info already in a table:UPDATE [table name] SET Select_priv = 'Y',Insert_priv = 'Y',Update_priv = 'Y' where [field name] = 'user';
Delete a row(s) from a table:DELETE from [table name] where [field name] = 'whatever';
Update database permissions/privilages:FLUSH PRIVILEGES;
Make a unique column so you get no dupes:alter table [table name] add unique ([column name]);
Delete unique from table:alter table [table name] drop index [colmn name];
Dump db table as CSV file.use [dbase_name]; select * from [table_name] into outfile './export-out.txt';
On my linux system, that would be in the default '/var/lib/mysql' directory.
Load a CSV file into a table:LOAD DATA INFILE \'/tmp/filename.csv\' replace INTO TABLE [table name] FIELDS TERMINATED BY ',' LINES TERMINATED BY '\n' (field1,field2,field3);
Dump all databases for backup.Backup file is sql commands to recreate all db\'s.[mysql dir]/bin/mysqldump --user=root --password=blah --all-databases >/tmp/sql-01_backup.sql
Create Table Example 1 CREATE TABLE [table name] (firstname VARCHAR(20), middleinitial VARCHAR(3), lastname VARCHAR(35),suffix VARCHAR(3),
officeid VARCHAR(10),userid VARCHAR(15),username VARCHAR(8),email VARCHAR(35),phone VARCHAR(25), groups
VARCHAR(15),datestamp DATE,timestamp time,pgpemail VARCHAR(255));
Create Table Example 2 create table [table name] (personid int(50) not null auto_increment primary key,firstname varchar(35),middlename varchar(50),lastname varchar(50) default 'bato');