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Whenever a DML statement (INSERT, UPDATE and DELETE) is issued, an implicit cursor is associated with this statement.For INSERT operations, the cursor holds the data that needs to be inserted.A cursor contains information on a select statement and the rows of data accessed by it.This temporary work area is used to store the data retrieved from the database, and manipulate this data.
The set of rows the cursor holds is called the set.
For UPDATE and DELETE operations, the cursor identifies the rows that would be affected.
In PL/SQL, you can refer to the most recent implicit cursor as the SQL cursor, which always has attributes such as %FOUND, %ISOPEN, %NOTFOUND, and %ROWCOUNT.
There are two types of cursors − Implicit cursors are automatically created by Oracle whenever an SQL statement is executed, when there is no explicit cursor for the statement.
Programmers cannot control the implicit cursors and the information in it.
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Here are the new default settings: There's also a new menu item Use Ctrl Click for Multi-Cursor in the Selection menu to quickly toggle this setting.