Can we use cursor attributes in FOR LOOP?

Can we use cursor attributes in FOR LOOP?

To get the index in a for loop, you can add the rownum pseudocolumn in the select clause of implicit cursor.

How do you declare a cursor inside a FOR LOOP?

The cursor variable, opening of cursor, fetching and closing of the cursor will be done implicitly by the FOR loop. Syntax: DECLARE CURSOR IS ; BEGIN FOR I IN LOOP . .

Which SQL statement can not use an implicit cursor?

You can use cursor attributes only in procedural statements, not in SQL statements. SQL%ISOPEN always has the value FALSE . SQL%FOUND has one of these values: If no SELECT or DML statement has run, NULL .

How do you write a for loop in PL SQL?

PL/SQL For Loop Example 2

1. DECLARE.
2. VAR1 NUMBER;
3. BEGIN.
4. VAR1:=10;
5. FOR VAR2 IN 1..10.
6. LOOP.
7. DBMS_OUTPUT.PUT_LINE (VAR1*VAR2);
8. END LOOP;

Can we use Isopen attribute with implicit cursor?

An implicit cursor has attributes that return information about the most recently run SELECT or DML statement that is not associated with a named cursor. Note: You can use cursor attributes only in procedural statements, not in SQL statements. SQL%ISOPEN always has the value FALSE .

What is implicit and explicit cursor in PL SQL?

Implicit cursors are automatically created when select statements are executed. Explicit cursors needs to be defined explicitly by the user by providing a name. They are capable of fetching a single row at a time. Explicit cursors can fetch multiple rows. Cursor attributes use prefix “SQL”.

What are PL SQL cursor exceptions?

An exception is a PL/SQL error that is raised during program execution, either implicitly by TimesTen or explicitly by your program. Handle an exception by trapping it with a handler or propagating it to the calling environment.

Can we use loop in PL SQL?

PL/SQL for loop is used when when you want to execute a set of statements for a predetermined number of times. The loop is iterated between the start and end integer values. The counter is always incremented by 1 and once the counter reaches the value of end integer, the loop ends.

How do you write implicit cursor attributes?

Implicit Cursor Attributes If SELECT INTO statement return no rows and fire no_data_found PL/SQL exception before you can check SQL%NOTFOUND. If not affect the row return TRUE otherwise return FALSE. Return the number of rows affected by a SELECT statement or DML statement (insert, update, delete).

What is a PL SQL cursor?

A cursor is a pointer to this context area. PL/SQL controls the context area through a cursor. A cursor holds the rows (one or more) returned by a SQL statement. The set of rows the cursor holds is referred to as the active set.

What is the cursor variable in SQL?

Cursor variables (PL/SQL) A cursor variable is a cursor that contains a pointer to a query result set . The result set is determined by execution of the OPEN FOR statement using the cursor variable. A cursor variable, unlike a static cursor, is not associated with a particular query.

What is Oracle SQL cursor?

The Cursor is a handle (name or a pointer) for the memory associated with a specific statement. A cursor is basically an Area alocated by Oracle for executing the Sql Statements. Oracle Uses an Implicit Cursor statement for a single row query and Explicit Cursor for a multi row query.