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Oracle

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Get a Table Description in Oracle's PL/SQL
by Aaron Mason
Using Oracle's PL/SQL, you can get complete table column descriptions using this command.
Determine Which Session Is Blocking All Users in Oracle
by Srinath MS
You can find out which session is causing blocking problems using this SQL command.
How to Store Oracle 10g Log Files in XML
by Srinath MS
Oracle 10g supports several ways to store log files, including XML.
Creating Tables in the Default Tablespace
by MS Sridhar
Most users typically create tables in the default tablespace. Most of them are not familiar with the actual tablespaces concept and are not aware that this is responsible for the issues they encounter when large data is pumped into said tables.
Using the GRANT Command
by Alexander Ocher
The SQL GRANT command is used to grant access privileges to database objects and role authorizations.
Trigger Efficiency in Oracle
by Alexander Ocher
It turns out that the latest documentation for Oracle 10g and 11g is incorrect and the documentation for Oracle 9i and previous releases is correct: AFTER row triggers are more efficient than BEFORE row triggers.
Using ANYDATA in Oracle 9i
by Shraddha Pandya
First introduced in Oracle 9i, ANYDATA is a "self-describing data instance type" which means it not only holds the value, but it also holds its own data type within each instance of it.
Quick Script Monitors Application-generated SQL
by Jason Bramsden
This script was written to monitor a program whose process life was only a few seconds. It runs forever and only outputs that SQL which is generated by the program as it's running.
Predicate Pushing
by Shraddha Pandya
Oracle supports the pushing of predicates into a given view.
How to Use Oracle Java XQuery API
by Leonard Anghel
This code illustrates the main steps involved in using the Oracle Java XQuery API (OJXQI).
Changing Column Names in Oracle
by MS Sridhar
Oracle does not have a mechanism by which you directly change column names. But this workaround is quick and efficient.
Fetching the Last Entered Records in Oracle
by MS Sridhar
Oracle provides an easy way of retrieving the last records entered in your database.
Retrieve the Month's First Day for a Date
by Amit Vij
This code shows you how to retrieve the month's first day for a date.
Fetching Even and Odd Records in Oracle
by MS Sridhar
This tip will help you understand how to apply the mod function and use it to obtain even and odd records from columns in Oracle.
Dealing with Wildcard Characters in Oracle
by MS Sridhar
The ESCAPE keyword comes handy when you have a character in your data which is same as a Wildcard character.
Convert Descriptive Flex Fields to Numbers
by Kamlesh Jethwa
Often, data in Oracle applications is stored in extended columns known as Descriptive Flex Field (DFF) columns.
Handling Null Values in Oracle
by MS Sridhar
Find out how using NVL in your queries is better for displaying information and helps avoid front-end processing.
Determine the Type of Modifcation Operation on a Table
by Sachin Kainth
Find out how to use the INSERTING, DELETING and UPDATING trigger predicates to determine the type of modifcation operation that's been performed on a table.
Turning Recursive and Nested Triggers On and Off
by Sachin Kainth
This tip gives you the commands to switch recursive and nested triggers on and off.
Presenting Dates in Varying Formats
by Sridhar MS
Dates are generally a requirement for every application. However, including dates for users across the globe can be tedious, because different people use different formats to read the date.
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