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Oracle - Page 2

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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.
Getting New Values Entered into a Table
by Sachin Kainth
Find out how you can use :new.<fieldname> to retrieve new values entered into a table.
Making Tables Read-only in Oracle
by MS Sridhar
In Oracle, you can only control read/write capability for an entire tablespace, not for a single table within a tablespace.
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