Query to check index size in Oracle select sum(bytes)/1024/1024 as "Index Size (MB)" from dba_segments where segment_name='&INDEX_NAME'; select sum(bytes)/1024/1024 as "Index Size (MB)" from user_segments where
Drop constraint in Oracle: We can drop the constraint in Oracle using the alter table command. we can drop primary, foreign key, check, not null and unique constraint with the same command Coalesce Function in Oracle: The Coalesce function in Oracle will return the first expression if it is ...
But first, let’s delve into the different types of indexes available in Oracle Database.How to Choose the Index TypeOracle Database offers many different types of index to improve your SQL. One of the key decisions you need to make is whether to go with a bitmap or B-tree index....
This finds 99.999% of all errors. It first checks all index entries for errors and then reads through all rows. It calculates a checksum for all key values in the rows and verifies that the checksum matches the checksum for the keys in the index tree. ...
How do I check if EmpID EE# exists in SupervisorID column and categorize it based on Manager or Individual Contributor in OBIEE. Here's the table for reference. Currently, consider there are only 2 columns EmpID EE# and SupervisorID. I need a formula t...
My Oracle Support - Version 3.3.1.0.0 and laterInformation in this document applies to any platform.GoalGuide to search bugs or Enhancement Requests (ER) by title, by number and shows possibilities on My Oracle Support to track the bug status or when the bug has been marked as favorite.The...
Because a block device’s total size is fixed and easy to index, processes have random access to any block in the device with the help of the kernel. 程序以固定的块大小从块设备中访问数据。 上述示例中的sda1是一个磁盘设备,也是一种块设备。 磁盘可以被分割成数据块。 由于块设备的总大小是...
oracle (phys-paris-1)$dgmgrl sys/sysdba_password@sales-svcDGMGRL>create configuration mysales.com as primaryDGMGRL>database is sales connect identifier is sales-svc; If you find errors when you connect to the Oracle Data Guard Broker, check the${ORACLE_HOME}/admin/sales/bdump/alert_prim_sid...
PostgreSQL generates event logs that contain useful information. SQL query failures, failed login attempts, and deadlocks are captured in the logs by default. These error messages can help identify various application issues. For example, if you converted a legacy application f...
JavaScript Object Notation (JSON) is a lightweight data transfer format. It's the de facto standard for document exchange. So it's likely you'll want to send and receive JSON documents from and to your database. And store them in your tables. Oracle Dat