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Unlike an implicit cursor, you can reference an explicit cursor or cursor variable by its name. There are cases where using an explicit cursor loop (i.e.Therefore, an explicit cursor or cursor variable is called a named cursor. declaring a CURSOR variable in the declaration section) produces either cleaner code or better performance I see that many developers are using explicit cursors instead of implicit cursors out of old habit.
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You cannot assign a value to an explicit cursor, use it in an expression, or use it as a formal subprogram parameter or host variable.
You can do those things with a cursor variable (see "Cursor Variables").
Our DBA explained this to us, we wouldn't have been able to get to the bottom of this ourselves.
It seems this is a bug in Oracle that's been reported.
This because back in Oracle version 7 this was always the more efficient way to go. Specially with the optimizer that if needed may rewrite implicit cursor for loops to a bulk collect.
Recently I had to rewrite a bunch of queries from an implicit FOR loop into explicit cursors.It is created on a SELECT Statement which returns more than one row.When processing an SQL statement, Oracle creates a temporary work area in the system memory which contains all the information needed for processing the statement known as context area. Note: The set of rows the cursor holds is known as active set. When DML statements like INSERT, UPDATE, or DELETE are executed the cursor attributes tell us whether any rows are affected or not and how many have been affected. INTO statement is executed in a PL/SQL Block, implicit cursor attributes can be used to find out whether any row has been returned by the SELECT statement or not and returns an error when no data is selected.Oracle creates a memory area, known as context area, for processing an SQL statement, which contains all information needed for processing the statement, for example, number of rows processed, etc. The set of rows the cursor holds is referred to as the active set. A cursor holds the rows (one or more) returned by a SQL statement.In PL/SQL, you can refer to the most recent implicit cursor as the SQL cursor, which always has the attributes like %FOUND, %ISOPEN, %NOTFOUND, and %ROWCOUNT.Tags: Adult Dating, affair dating, sex dating