The Geek Stuff » Database

How to Install SQLite3 from Source on Linux (With a Sample Database)

Ramesh Natarajan — Wed, 06 Jul 2011 06:02:14 +0000

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, [...]

Support us when you shop at Amazon: Top 25 Gadgets Every Geek Should Have
Purchase your copy of Bash 101 Hacks, Vim 101 Hacks, Sed and Awk 101 Hacks, Nagios Core 3 eBook.

How to Allow MySQL Client to Connect to Remote MySQL server

Ramesh Natarajan — Thu, 12 Aug 2010 06:02:50 +0000

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 [...]

Support us when you shop at Amazon: Top 25 Gadgets Every Geek Should Have
Purchase your copy of Bash 101 Hacks, Vim 101 Hacks, Sed and Awk 101 Hacks, Nagios Core 3 eBook.

8 PostgreSQL Date and Time Function Examples

Balakrishnan Mariyappan — Thu, 08 Jul 2010 06:02:43 +0000

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 [...]

Support us when you shop at Amazon: Top 25 Gadgets Every Geek Should Have
Purchase your copy of Bash 101 Hacks, Vim 101 Hacks, Sed and Awk 101 Hacks, Nagios Core 3 eBook.

MYSQL_PS1: 6 Examples to make your mysql> prompt like Angelina Jolie

Ramesh Natarajan — Mon, 22 Feb 2010 06:03:44 +0000

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 [...]

Support us when you shop at Amazon: Top 25 Gadgets Every Geek Should Have
Purchase your copy of Bash 101 Hacks, Vim 101 Hacks, Sed and Awk 101 Hacks, Nagios Core 3 eBook.

Disable MySQL History – Clear ~/.mysql_history and MYSQL_HISTFILE

Ramesh Natarajan — Fri, 15 Jan 2010 06:01:55 +0000

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: [...]

Support us when you shop at Amazon: Top 25 Gadgets Every Geek Should Have
Purchase your copy of Bash 101 Hacks, Vim 101 Hacks, Sed and Awk 101 Hacks, Nagios Core 3 eBook.

Forgot MySQL Root Password – How To Reset It?

Ramesh Natarajan — Wed, 22 Jul 2009 06:01:13 +0000

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 [...]

Support us when you shop at Amazon: Top 25 Gadgets Every Geek Should Have
Purchase your copy of Bash 101 Hacks, Vim 101 Hacks, Sed and Awk 101 Hacks, Nagios Core 3 eBook.

How To Change MySQL Root Password

Ramesh Natarajan — Fri, 17 Jul 2009 06:01:10 +0000

Question: How do I change MySQL root Password? Answer: You can change MySQL root password using one of the following 3 methods. These methods can be used on both Windows and Unix Environment including Ubuntu, Debian, CentOS, Fedora, RedHat, Arch Linux, SUSE etc., Method 1. How to Change MySQL Root Password Using mysqladmin Command? You [...]

Support us when you shop at Amazon: Top 25 Gadgets Every Geek Should Have
Purchase your copy of Bash 101 Hacks, Vim 101 Hacks, Sed and Awk 101 Hacks, Nagios Core 3 eBook.

15 Advanced PostgreSQL Commands with Examples

SathiyaMoorthy — Thu, 21 May 2009 15:02:29 +0000

Some of the open source application comes with postgreSQL database. To maintain those application, companies may not hire a fulltime postgreSQL DBA. Instead they may request the existing Oracle DBA, or Linux system administrator, or programmers to maintain the potgreSQL. In this article let discuss about the 15 practical postgresql database commands which will be [...]

Support us when you shop at Amazon: Top 25 Gadgets Every Geek Should Have
Purchase your copy of Bash 101 Hacks, Vim 101 Hacks, Sed and Awk 101 Hacks, Nagios Core 3 eBook.

Oracle LSNRCTL – Listener Shutdown and Startup Procedures

Ramesh Natarajan — Mon, 18 May 2009 15:02:28 +0000

Starting up and shutting down the oracle listener is a routine task for a database administrator. However a Linux system administrator or programmer may end-up doing some basic DBA operations on development database. It is critical for non-DBAs to understand the basic database admin activities. In this article, let us review how to start, stop, [...]

Support us when you shop at Amazon: Top 25 Gadgets Every Geek Should Have
Purchase your copy of Bash 101 Hacks, Vim 101 Hacks, Sed and Awk 101 Hacks, Nagios Core 3 eBook.

15 Practical PostgreSQL Database Administration Commands

Ramesh Natarajan — Thu, 16 Apr 2009 15:03:32 +0000

Earlier we discussed about how to install PostgreSQL database on Linux from source. In this article, let us review top 15 practical postgreSQL DBA command examples. If you are a mySQL administrator, check-out our 15 examples of mysqladmin command article that we discussed a while back. 1. How to change PostgreSQL root user password ? [...]

Support us when you shop at Amazon: Top 25 Gadgets Every Geek Should Have
Purchase your copy of Bash 101 Hacks, Vim 101 Hacks, Sed and Awk 101 Hacks, Nagios Core 3 eBook.