SQL

Using ROWNUM to paginate the data in Oracle

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In one of my previous posts, I showed you how to use ROWNUM with ORDER BY clause. Building on that in this post I will show you how you can paginate your results using ROWNUM in Oracle DB and how you should not paginate your data. Suppose I have a table with the following structure: … Read more

Using BULK COLLECT INTO construct in Oracle PLSQL

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At times when you are programming in PLSQL you would want to fetch multiple records into an ARRAY or some collection. One approach to do is to loop through the result of the SQL query and then keep adding each record to the ARRAY or Collection. PLSQL provides another construct to perform the same operation … Read more

Using ROWNUM with ORDER BY in Oracle SQL

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Lot of times you have tried to use ROWNUM clause along along with the ORDER BY clause and must have been treated with a different output than you expected. You would expect the ROWNUM to be applied after the results have been ordered by the column, but instead it applies the ROWNUM and then does … Read more

MySQL: World’s Most popular Open Source database

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What is MySQL?

MySQL is an Open Source database management system(DBMS) that one can download for free from MySQL Website (www.mysql.com). MySQL is one of the world’s most popular systems for Java web applications because of its consistent fast performance, high reliability and ease of use. MySQL runs on more than 20 platforms including Linux, Windows, OS/X, HP-UX, AIX, Netware, giving the developers right kind of flexibility. 

MySQL is owned and sponsored by a single for-profit firm, the Swedish company MySQL AB, now a subsidiary of Sun Microsystems, which holds the copyright to most of the codebase. The project’s source code is available under terms of the GNU General Public License, as well as under a variety of proprietary agreements.

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