How To Convert Number into Words using Oracle SQL Query
How can you convert a number into words using Oracle Sql Query? What I mean by Number to Word is: Here’s a classy query which will convert number into words.Please see the query below:...
Database Tutorials, Tips & Tricks
Spring Roo: Two Databases Configuration
I’ve seen very often a recurrent question on Spring Roo forums. The question is “How to configure the application to handle two databases”. Certainly this is a more ample question to Spring Roo only,...
Row Data Multiplication in Oracle
Aggregate functions return a single result row based on a group of rows. This differentiates them from Single-Row functions which act on each row. These functions are extensively used with the GROUP BY clause...
Generating Random Data in Oracle
Most of the times, production data is not available in development environments. Here, I would like to share a single sql command which can generate random data. But before that, let’s address another issue...
Deleting Duplicate Rows in Oracle
Deleting duplicate rows from tables is one of the common task oracle developers come across. The data might get duplicated because of missing primary/unique key on the table or batch file getting loaded multiple...
Invisible Indexes in Oracle 11g
The effective usage of an index is always a big question. There are instances in production environments, where an index may help the performance of just a single query, while it can degrade the...
Oracle Data Compression
As the data grows in relational databases (new business requirements, managing audit data etc), the cost associated with the disk systems to store that data and the resources required to manage them becomes vital....
Understanding Primary Key(PK) Constraint in Oracle
The Primary Key(PK) constraint is the most basic concept of any RDBMS (I am particularly interested in Oracle). Yet, I have noticed people getting confused when it comes to the practical usage and asking...
Fast data copy with “Create Table Select From” in PL/SQL
Although I work mainly in Java/J2EE, recently I had a requirement in Oracle to take temporary backup of a table and compare the data of original table with this backup table. So I had...
Fetch Random rows from Database (MySQL, Oracle, MS SQL, PostgreSQL)
Ever thought why would one need to fetch random rows from a database table? You may want to display some random information (like articles/pages/links) to your user. I had a requirement wherein I had...