Difference between revisions of "Mysql"

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==MySql Commands My Fav ==
Find and Replace the word "GaGa, Ladyy" in Artists and replace with "Lady GaGa
UPDATE Karaoke set Artists = replace(Artists, "GaGa, Lady", "Lady GaGa");
UPDATE wp2_posts
SET `post_content`= replace(`post_content`, "' rel='sexylightbox[]", "")
Delete  FROM `master2011` WHERE id < 1688
Update single record
UPDATE Karaoke
SET Title = 'Size 10 Red Shoe',
Artists = 'Big Red Shoes
Where DiskId=1234
This will grant all priviliges to the user admin. will only work on local host not remote
GRANT ALL ON *.* TO admin@localhost WITH GRANT OPTION;
FLUSH PRIVILEGES;  // this relloads the priviliges
use databasename // this loads the database
Show tables //show tables
Describe tablename//show fields
select * from tablename where Title Like "%fire%" //returns all instance of fire. you can also
select count (*) from tablename// returns number of records
select * from tablename where Diskid="200"; // shows all records with disk id of 200
select diskid, track, title, artists from tablename order by title // display defined columns. sort by title
select artists, count(artists) from Karaoke Group by artists // counts the number of songs  by that artists
select artists, group_concat(title order by title separator ' | ' ) from tablename Group by artists // list them songs by artists
select * from passrequest where match (companyname, state) against ("texas") //column has to be fulltext search- fulltext search is when you setup the    field proberties for the structure.
Resets the auto_increment, in a situation where some of the most recently added rows were deleted. future insertions will be numbered from 15786 again (unless you still had rows numbered greater than 1234, and then the future insertions will start from the greatest number + 1 ).
DELETE FROM tablename WHERE id=3; // will delete record with id 3
==Create mysql database in ubuntu shell==
On a default settings, mysql root user do not need a password to authenticate from localhost. In this case, ou can login as root on your mysql server using:
$ mysql -u root
If a password is required, use the extra switch -p:
$ mysql -u root -p
Enter password:
Now that you are logged in, we create a database:
mysql> create database amarokdb;
Query OK, 1 row affected (0.00 sec)
We allow user amarokuser to connect to the server from localhost using the password amarokpasswd:
mysql> grant usage on *.* to amarokuser@localhost identified by 'amarokpasswd';
Query OK, 0 rows affected (0.00 sec)
And finally we grant all privileges on the amarok database to this user:
mysql> grant all privileges on amarokdb.* to amarokuser@localhost ;
Query OK, 0 rows affected (0.00 sec)
And that's it. You can now check that you can connect to the MySQL server using this command:
$ mysql -u amarokuser -p'amarokpasswd' amarokdb
Your MySQL connection id is 12
Server version: 5.0.38-Ubuntu_0ubuntu1-log Ubuntu 7.04 distribution
Type 'help;' or '\h' for help. Type '\c' to clear the buffer.
== securing MYSQL and setting a Password ==
==Mysql Backup and Restore  ==
===Bakcup a single database===
done from bash - no need to log in to mysql
mysqldump -u root -ppassword sugarcrm > sugarcrm.sq
mysqldump -u root -p[root_password] [database_name] > dumpfilename.sql
===Backup a single table===
mysqldump -u root -ppassword databasename table > sugarcrm.sq
===Backupup Multiple Database===
log into mysql
mysql -u root -pyourpassword
mysql> show databases;
this will give you a list of databases
For example, if you want to take backup of both sugarcrm and bugs database, execute the mysqldump as shown below:
mysqldump -u root -ptmppassword --databases bugs sugarcrm > bugs_sugarcrm.sql
Verify the bugs_sugarcrm.sql dumpfile contains both the database backup.
# grep -i "Current database:" /tmp/bugs_sugarcrm.sql
-- Current Database: `mysql`
-- Current Database: `sugarcrm`
=== Backup all the databases:===
The following example takes a backup of  all the database of the MySQL instance.
# mysqldump -u root -ptmppassword --all-databases > /tmp/all-database.sql
=== Backup a specific table:===
In this example, we backup only the accounts_contacts table from sugarcrm database.
mysqldump -u root -ptmppassword sugarcrm accounts_contacts > /tmp/sugarcrm_accounts_contacts.sql
===Restore Database===
mysql -u username -p database < dump_file.sql
== Set / Change Mysql Password ==
Set / change / reset the MySQL root password on Ubuntu Linux. Enter the following lines in your terminal.
Stop the MySQL Server.
sudo /etc/init.d/mysql stop
Start the mysqld configuration.
sudo mysqld --skip-grant-tables &
Login to MySQL as root.
mysql -u root mysql
Replace YOURNEWPASSWORD with your new password!
== Reset mysql password  ==
dpkg-reconfigure mysql-server-5.0
dpkg-reconfigure mysql-server-5.1
Depending on which package you have installed.
the will bring up the enter password screen for mysql
==  ==
== Import csv file into Php Myadmin Database  ==
Structure has to match exactly or you will get an import error.
"Invalid field count in csv input line 1"
Make sure you count the fields. if there is 6 fileds (including the key) you must have 6 fields to import
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Latest revision as of 19:49, 5 November 2021