Many people often ask me the questions What is Undo and redo in Oracle database? What is it uses? I am trying to clear all the doubt about it here in the post What is Undo in Oracle? Undo is stored in Undo tablespace in the database.It stored the before values of changed data blocks whenever …
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Hot backup means the system is Up and running and Updates are going on as usual I would here explain Mechanism Following by Oracle when we taking hot backup Manual Hotbackup Manual hotbackup start with below command for a tablespace alter tablespace USERS begin backup; Few things happens at that time 1)DBWn checkpoints the tablespace (writes …
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So far you have understood the introductory tags in html and here is the example of html based on that <html> <head> <title>My fisrt Web page</title> </head> <body> Hello techgoeasy </body> </html> Now in this section , we will learning about text tags in HTML Tags Meaning <h1> and </h1> <h1> tags tell the …
I am discussing here the instroduction to basic tags in HTML Tags Meaning <html> and </html> <html> tags tell the browser that it is a html page. So it is basic steps of html and every other tags comes after that <html> beginning of the html </html> end of the html The beginning <html> and …
In this section of Oracle sql,we will discuss about order by and distinct clause Define a null value: If a column in a table has no assigned value , then the column is said to be null for that row. A null is a value that is unavailable,unassigned ,unknown. A null is not same as …
In the last section on Oracle Database 12c, we discussed about the general architecture about Oracle 12c Multitenant Architecture Multitenant Architecture Now we will go in more details about. What is Container Database (CDB) and Pluggable Database (PDB)? Container Database (CDB) : Container database(CDB) is a main part of Multitenant database .It houses all the …
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