| Description | Command Syntax |
| Create mysql 'root' password | SET PASSWORD FOR root@localhost=PASSWORD('password_wanted'); Must have root access. |
| Create user access for specific Database | Run this command from command line as root 'mysql_setpermission' Must log in as root |
| Change users password | SET 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 Hou | SELECT * FROM [table_name] WHERE [City_Field] LIKE 'Hou%'; |
| Find any name records containing ary | SELECT * 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 criteria | UPDATE [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];
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| 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;
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| 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));
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| 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');
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