Mysql Cheatsheet

Update password in WordPress database

UPDATE wp_users SET user_pass = MD5( ‘new_password’ ) WHERE wp_users.user_login = “admin_username”; password must be set to md5 for login to work

troubleshoot

check if mysql daemon is running

ps -feax | grep mysqld

mysql not found

add this to profile

export PATH="/usr/local/opt/mysql@5.7/bin:$PATH"

sql query export data from woocommerce shop

function run_sql_query() {
mysql -u root -p -e "select
p.ID as order_id,
p.post_date,
max( CASE WHEN pm.meta_key = '_billing_email' and p.ID = pm.post_id THEN pm.meta_value END ) as billing_email,
max( CASE WHEN pm.meta_key = '_billing_phone' and p.ID = pm.post_id THEN pm.meta_value END ) as billing_phone,
max( CASE WHEN pm.meta_key = '_billing_first_name' and p.ID = pm.post_id THEN pm.meta_value END ) as _billing_first_name,
max( CASE WHEN pm.meta_key = '_billing_last_name' and p.ID = pm.post_id THEN pm.meta_value END ) as _billing_last_name,
max( CASE WHEN pm.meta_key = '_order_total' and p.ID = pm.post_id THEN pm.meta_value END ) as order_total,
max( CASE WHEN pm.meta_key = '_order_tax' and p.ID = pm.post_id THEN pm.meta_value END ) as order_tax,
max( CASE WHEN pm.meta_key = '_paid_date' and p.ID = pm.post_id THEN pm.meta_value END ) as paid_date,
max( CASE WHEN p.ID = wptr.object_id THEN wptr.term_taxonomy_id END ) as status
from
wp_posts as p,
wp_postmeta as pm,
wp_term_relationships as wptr
where
post_type = 'shop_order' and
p.ID = pm.post_id and
post_date BETWEEN '2016-010-20' AND '2016-11-19'
group by
p.ID" ap2 > ap_output.sql

}

create a new user via mysql

INSERT INTO wp_users (user_login, user_pass, user_nicename, user_email, user_status) VALUES (‘newadmin’, MD5(‘pass123’), ‘firstname lastname’, ‘email@example.com’, ‘0’);

INSERT INTO wp_usermeta (umeta_id, user_id, meta_key, meta_value) VALUES (NULL, (Select max(id) FROM wp_users), ‘wp_capabilities’, ‘a:1:{s:13:”administrator”;s:1:”1”;}’);

INSERT INTO wp_usermeta (umeta_id, user_id, meta_key, meta_value) VALUES (NULL, (Select max(id) FROM wp_users), ‘wp_user_level’, ‘10’);

update site url

UPDATE wp_options SET option_value = replace(option_value, ‘http://www.oldurl’, ‘http://www.newurl’) WHERE option_name = ‘home’ OR option_name = ‘siteurl’;

UPDATE wp_posts SET guid = replace(guid, ‘http://www.oldurl’,’http://www.newurl’);

UPDATE wp_posts SET post_content = replace(post_content, ‘http://www.oldurl’, ‘http://www.newurl’);

UPDATE wp_postmeta SET meta_value = replace(meta_value,’http://www.oldurl’,’http://www.newurl’);

mysql commands

#restore .sql file to the database mysql target-db-name < sql-file-name.sql -uuser -p

[mysql dir]/bin/mysql -h hostname -u root -p

Create a database on the sql server. mysql> create database [databasename];

List all databases on the sql server. mysql> show databases;

Switch to a database. mysql> use [db name];

To see all the tables in the db. mysql> show tables;

To see database’s field formats. mysql> describe [table name];

To delete a db. mysql> drop database [database name];

To delete a table. mysql> drop table [table name];

Show all data in a table. mysql> SELECT * FROM [table name];

Returns the columns and column information pertaining to the designated table. mysql> show columns from [table name];

Show certain selected rows with the value “whatever”. mysql> SELECT * FROM [table name] WHERE [field name] = “whatever”;

Show all records containing the name “Bob” AND the phone number ‘3444444’. mysql> 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. mysql> 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’. mysql> SELECT * FROM [table name] WHERE name like “Bob%” AND phone_number = ‘3444444’;

Show all records starting with the letters ‘bob’ AND the phone number ‘3444444’ limit to records 1 through 5. mysql> SELECT * FROM [table name] WHERE name like “Bob%” AND phone_number = ‘3444444’ limit 1,5;

Use a regular expression to find records. Use “REGEXP BINARY” to force case-sensitivity. This finds any record beginning with a. mysql> SELECT * FROM [table name] WHERE rec RLIKE “^a”;

Show unique records. mysql> SELECT DISTINCT [column name] FROM [table name];

Show selected records sorted in an ascending (asc) or descending (desc). mysql> SELECT [col1],[col2] FROM [table name] ORDER BY [col2] DESC;

Return number of rows. mysql> SELECT COUNT(*) FROM [table name];

Sum column. mysql> SELECT SUM(*) FROM [table name];

Join tables on common columns. mysql> 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;

Creating a new user. Login as root. Switch to the MySQL db. Make the user. Update privs.

mysql -u root -p

mysql> use mysql; mysql> INSERT INTO user (Host,User,Password) VALUES(‘%’,’username’,PASSWORD(‘password’)); mysql> flush privileges;

Change a users password from unix shell.

[mysql dir]/bin/mysqladmin -u username -h hostname.blah.org -p password ‘new-password’

Change a users password from MySQL prompt. Login as root. Set the password. Update privs.

mysql -u root -p

mysql> SET PASSWORD FOR ‘user’@’hostname’ = PASSWORD(‘passwordhere’); mysql> flush privileges;

Recover a MySQL root password. Stop the MySQL server process. Start again with no grant tables. Login to MySQL as root. Set new password. Exit MySQL and restart MySQL server.

/etc/init.d/mysql stop

mysqld_safe –skip-grant-tables &

mysql -u root

mysql> use mysql; mysql> update user set password=PASSWORD(“newrootpassword”) where User=’root’; mysql> flush privileges; mysql> quit

/etc/init.d/mysql stop

/etc/init.d/mysql start

Set a root password if there is on root password.

mysqladmin -u root password newpassword

Update a root password.

mysqladmin -u root -p oldpassword newpassword

Allow the user “bob” to connect to the server from localhost using the password “passwd”. Login as root. Switch to the MySQL db. Give privs. Update privs.

mysql -u root -p

mysql> use mysql; mysql> grant usage on . to bob@localhost identified by ‘passwd’; mysql> flush privileges;

Give user privilages for a db. Login as root. Switch to the MySQL db. Grant privs. Update privs.

mysql -u root -p

mysql> use mysql; mysql> INSERT INTO db (Host,Db,User,Select_priv,Insert_priv,Update_priv,Delete_priv,Create_priv,Drop_priv) VALUES (‘%’,’databasename’,’username’,’Y’,’Y’,’Y’,’Y’,’Y’,’N’); mysql> flush privileges;

or

mysql> grant all privileges on databasename.* to username@localhost; mysql> flush privileges;

To update info already in a table. mysql> UPDATE [table name] SET Select_priv = ‘Y’,Insert_priv = ‘Y’,Update_priv = ‘Y’ where [field name] = ‘user’;

Delete a row(s) from a table. mysql> DELETE from [table name] where [field name] = ‘whatever’;

Update database permissions/privilages. mysql> flush privileges;

Delete a column. mysql> alter table [table name] drop column [column name];

Add a new column to db. mysql> alter table [table name] add column [new column name] varchar (20);

Change column name. mysql> alter table [table name] change [old column name] [new column name] varchar (50);

Make a unique column so you get no dupes. mysql> alter table [table name] add unique ([column name]);

Make a column bigger. mysql> alter table [table name] modify [column name] VARCHAR(3);

Delete unique from table. mysql> alter table [table name] drop index [colmn name];

Load a CSV file into a table. mysql> 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 -u root -ppassword –opt >/tmp/alldatabases.sql

Dump one database for backup.

[mysql dir]/bin/mysqldump -u username -ppassword –databases databasename >/tmp/databasename.sql

Dump a table from a database.

[mysql dir]/bin/mysqldump -c -u username -ppassword databasename tablename > /tmp/databasename.tablename.sql

Restore database (or database table) from backup.

[mysql dir]/bin/mysql -u username -ppassword databasename < /tmp/databasename.sql

Create Table Example 1.

mysql> 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.

mysql> create table [table name] (personid int(50) not null auto_increment primary key,firstname varchar(35),middlename varchar(50),lastnamevarchar(50) default ‘bato’);