FOR record IN (select_statement) LOOP process_record_statements; END LOOP; Code language: PostgreSQL SQL dialect and PL/pgSQL (pgsql) In this case, the cursor FOR LOOP declares, opens, fetches from, and closes an implicit cursor. However, the implicit cursor is internal; therefore, you can...
for i in 1..10 loop …. end loop; Implicit cursor loop for c in (select ) loop …. end loop; While loop i:=5; while i >10 loop i:=i+1; ... end loop; Basic loop i:=5; loop i:=i+1; …. exit when i>10; end loop;...
%ISOPEN Attribute: Always FALSE for Implicit Cursors Oracle closes the SQL cursor automatically after executing its associated SQL statement. As a result, %ISOPEN always yields FALSE. %NOTFOUND Attribute: Has a DML Statement Failed to Change Rows? %NOTFOUND is the logical opposite of %FOUND. %...
Same example is given below for explicit cursor but with For Loop, the For Loop cursors are more smart as there is no need to declare variables to fetch values in them and no need to open or close or to check whether the pointer is at end of the cursor. Here is the example: DECLARE...
LOOPstatements execute a sequence of statements multiple times. The loop encloses the sequence of statements that is to be repeated. PL/SQL provides four kinds of loop statements: basic loop,WHILEloop,FORloop, and cursorFORloop. For more information, see"Iterative Control: LOOP and EXIT Statemen...
A cursor is a pointer that points to a result of a query. PL/SQL has two types of cursors: implicit cursors and explicit cursors. Implicit cursors Whenever Oracle executes an SQL statement such asSELECT INTO,INSERT,UPDATE, andDELETE, it automatically creates an implicit cursor. ...
In For loop all cursor operations done implicitly.. Real Example: FOR Sample_cursor IN C1 LOOP Total_Salary=Total_Salary + Appraisals; END LOOP; 6.What is Database Trigger?What is real use of trigger? Answer : PL SQL procedure which is used to trigger specific event on specific condition...
PL/SQL uses both implicit and explicit cursors. Cursor attributes return useful information about the status of cursors in the execution of SQL statements. PL/SQL implicitly creates a cursor for all SQL data manipulation statements on a set of rows, including queries that return only one row. ...
The table or varray element type can be any PL/SQL data type except REF CURSOR for nested tables and varrays specified in PL/SQL. A positive integer must be specified as the maximum size of a VARRAY type when it is defined. In the following example, we have defined a type that can ...
END LOOP; A PL/SQLFOR Loopwill implicitly declare a counter, or cursor variable. Remember that open, fetch, close functions are all implicit in the FOR-LOOP statement. IF-THEN-END IF Syntax Statement IF condition THEN statements; [ELSEIF condition THEN ...