A common occurrence I have noticed in MySQL apps is that MD5 values are stored as 32 byte values rather than 16. Just to ‘rehash’, an MD5 value is a 16 byte hexadecimal value, typically used as a unique fixed-length signature of a string, useful for...
Running a DELETE FROM table query in a database with millions of records would lock the table and cause the website to halt. This is where LIMIT clause comes in handy. The following query will only delete the first 1000 rows that match: DELETE FROM...
To change MySQL root password in CyberPanel we need to update it’s configuration. CyberPanel stores MySQL root password into two files: /etc/cyberpanel/mysqlPassword/usr/local/CyberCP/CyberCP/settings.py mysqlPassword File contains the MySQL...
mysqldump command line tool is without doubt the most well known way to backup a MySQL database or multiple databases.
mysqladmin is a command line tool that allows you to do administrative tasks in MySQL without actually login to the MySQL console.
Recently I did security and pen-testing assessment of a web application written entirely in PHP, and some of the biggest issues I’ve come along were in-code vulnerabilities to 💉 SQL injections. To fix this, I recommended using prepared...
Simple Answer: You will never use a index this way. Lets look at the following examples: EXPLAIN SELECT * FROM `wp_posts`; +—-+————-+———-+——+—————+——+———+——+——+——-+ | id | select_type | table | type | possible_keys | key | key_len | ref | rows |...
ORM Package for Node.js. Works with MySQL, PostgreSQL and SQLite. var orm = require('orm'); orm.connect("mysql://username:[email protected]/database", function (err, db) { if (err) throw err; var Person = db.define('person', { name : String, surname :...
The SELECT statement is used to select or fetch data from a your MySQL Database. It’s the most common type of query issued to a database. There are many ways to query a database, but were going to focus on the SELECT statement itself...
If you have deleted a large part of your table or updated many variable length rows, you should consider running the optimize command. If you want to quickly generate the optimize commands for every table in you database, executing the...
This list is the PHP version »SQL to Mongo correspondence table (there is a more general version in the official MongoDB manual). SQL queryMongo query statementCREATE TABLE USERS (a Number, b Number)Implicit creation, or MongoDB::createCollection() ...
Put it in a daily cronjob if you like, or extend it to copy the backup to another machine: