Oracle Skip Locked
Oracle 11g introduced SKIP LOCKED clause to query the records from the table which are not locked in any other active session of the database. This looks quite similar to exclusive mode of locking. The select for...
database queries Tutorials, Tips & Tricks
Pagination in Oracle using ROWNUM and Limiting Result Set
ROWNUM is a magic column in Oracle Database that gets many people into trouble. When you learn what it is and how it works, however, it can be very useful. I use it for...
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:...
Batch Insert In Java – JDBC
Let’s see how we can perform batch insert in Java using JDBC APIs. Although you might already knew this, I will try to explain the basic to a bit complex scenarios.In this note, we...
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...
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...