Most of you are already familiar with SQL database, and have a good knowledge on either MySQL, Oracle, or other SQL databases. In the last several years, NoSQL database is getting widely adopted to solve various business problems. It is helpful to understand the difference between SQL and NoSQL database, and some of available NoSQL [...]
Database
SQLite3 is very lightweight SQL database which focuses on simplicity more than anything else. This is a self-contained serverless database engine, which is very simple to install and use. While most of the commands in the SQLite are similar to SQL commands of other datbases like MySQL and ORACLE, there are some SQLite SQL commands [...]
SQLite3 is an extremely lightweight SQL database engine that is self-contained and serverless. There is absolutely no configuration that you need to do to get it working. All you need to do is–install it, and start using it. Since this is serverless, it is used in lot of the famous software that you are using, [...]
By default, MySQL does not allow remote clients to connect to the MySQL database. If you try to connect to a remote MySQL database from your client system, you will get “ERROR 1130: Host is not allowed to connect to this MySQL server” message as shown below. $ mysql -h 192.168.1.8 -u root -p Enter [...]
In this article, let us review following PostgreSQL date and time functions with practical examples. now() now()::date now()::time date_part() age() extract() date_trunc() to_char() to_timestamp() 1. Get Current Date and Time using PostgreSQL now() Get current date and time using the following query. dbase=# select now(); now ------------------------------ 2010-06-19 09:28:43.98216-07 (1 row) Use the ::time as [...]
A while back we tried to customize unix prompt to look like Angelina Jolie. Oh boy, didn’t I fail miserably in that attempt? Well, that didn’t stop me from trying an extreme makeover for mysql> prompt. Let us face it. The following mysql> prompt is boring. Nobody wants to see it. Let us change the [...]
Question: How do I disable mysql history? I don’t want mysql to remember the previous commands that I typed from the mysql> prompt. This is important for me, as when I type some sql commands that contains passwords, I see the clear text password stored in the ~/.mysql_history, which I don’t want to happen. Answer: [...]
Forgot your MySQL root user password? Don’t worry. We are here for rescue. When you tried to login to root without entering a password, you may get ‘Access Denied’ message, as MySQL is expecting a password. This article explains how to recover mysql root password by setting a new MySQL password when you don’t remember [...]
My name is Ramesh Natarajan. I will be posting instruction guides, how-to, troubleshooting tips and tricks on Linux, database, hardware, security and web. My focus is to write articles that will either teach you or help you resolve a problem. Read more about