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Oracle

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Remove a Constraint from a Table in Oracle SQL
by Ben Brumm
Language: SQL, Expertise: Beginner — Learn how to remove constraints that have been set up to enforce business rules on a database.
Find the Source Code of a Function or Procedure in Oracle SQL
by Ben Brumm
Language: SQL, Expertise: Beginner — If you need to find the source code for a function or procedure in the database, it's easy to do in Oracle.
Add Multiple Columns to a Table in a Single Statement in Oracle SQL
by Ben Brumm
Language: SQL, Expertise: Beginner
Get a List of all Tables In Oracle SQL
by Ben Brumm
How to Undo Dropping a Table in Oracle SQL
by Ben Brumm
Language: SQL||Expertise: Beginner
Change the Output Format of a Date with TO_DATE
by Ben Brumm
Language: SQL||Expertise: Beginner
Convert Oracle Queries into Microsoft SQL Format
by Andrew Kuprianov
Language: SQL||Expertise: Intermediate
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.
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