A cold backup is taking a backup of the database while it is shut down and does not require being in archive log mode.
The benefit of taking a hot backup is that the database is still available for use while the backup is occurring and you can recover the database to any point in time.
This process of extracting the elements of a collection is called refers to a LOB object attribute, then you must first initialize it with a value of empty or null. Also, if you are updating a LOB value using some method other than a direct to set the column to the value previously specified as the default value for the column.
If no default value for the corresponding column has been specified, then the database sets the column to null.
As I don't have time to format these questions to wiki I am just posting them hoping someone to format them. Explain the difference between a hot backup and a cold backup and the benefits associated with each.
A hot backup is basically taking a backup of the database while it is still up and running and it must be in archive log mode.
The Oracle UPDATE statement is used to update existing records in a table in an Oracle database.
There are 2 syntaxes for an update query in Oracle depending on whether you are performing a traditional update or updating one table with data from another table.
In this article, we are going to look at four scenarios for Oracle cross table update. Category_ID) where exists ( select * from Categories b where b. These columns uniquely identify a record in a table.
Suppose we have two tables Categories and Categories_Test. The common column in the two tables is CATEGORY_ID. Please note that query below is used for illustration purpose because Category_ID alone is primary key.
@a_horse_with_no_name: Oracle does not directly support the JOIN keyword in an UPDATE, but it allows UPDATE involving JOIN operations between table in at least 2 different ways, look at the accepted answer here: stackoverflow.com/questions/2446764/…