Clik here to view.
Index usage with LIKE operator in Oracle & Domain Indexes
A lot of developers might be confused about index selectivity while using %LIKE% operator. So please find below how index worked when you use LIKE operator. Problem Statement While optimizing high CPU...
View ArticleClik here to view.
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 two main things: To perform top-...
View ArticleClik here to view.
Index Skip Scan in Oracle
With Oracle 9i, the Cost-Based Optimizer (CBO) is equipped with many useful features, one of them is “Index skip scan“. In previous releases a composite index could only be used if the first column,...
View ArticleClik here to view.
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...
View ArticleClik here to view.
Java: Passing Array to Oracle Stored Procedure
This tutorial guides us on how to pass Array objects from Java to stored procedures in Oracle and also, how to retrieve an array object in Java. All PLSQL arrays can not be called from java. An array...
View ArticleClik here to view.
Oracle XMLTable Tutorial with Example
Since Oracle 10g, Oracle has added new functions XQuery and XMLTable to its arsenal of XML processing APIs. XMLQuery lets you construct XML data and query XML and relational data using the XQuery...
View ArticleClik here to view.
45 Useful Oracle Queries
Here’s a list of 40+ Useful Oracle queries that every Oracle developer must bookmark. These queries range from date manipulation, getting server info, get execution status, calculate database size...
View ArticleClik here to view.
How to pass CLOB argument in EXECUTE IMMEDIATE
We know that Oracle EXECUTE IMMEDIATE statement implements Dynamic SQL in Oracle. It provides end-to-end support when executing a dynamic SQL statement or an anonymous PL/SQL block. Before Oracle 11g,...
View ArticleClik here to view.
Compound Triggers in Oracle 11g – Tutorial with example
In Oracle 11g, the concept of compound trigger was introduced. A compound trigger is a single trigger on a table that enables you to specify actions for each of four timing points: Before the firing...
View ArticleClik here to view.
Auditing DML changes in Oracle
We are often faced with a situation when every DML change (Inserts/Updates/Deletes) made in Oracle/SQL tables must be audited. Banking Softwares and other similar applications have a strict requirement...
View Article