Guidelines

How do you continue a loop in PL SQL?

by Rhyley Bryan

How do you continue a loop in PL SQL?

Let’s take an example of PL/SQL continue statement.

  1. DECLARE.
  2. x NUMBER := 0;
  3. BEGIN.
  4. LOOP — After CONTINUE statement, control resumes here.
  5. DBMS_OUTPUT.PUT_LINE (‘Inside loop: x = ‘ || TO_CHAR(x));
  6. x := x + 1;
  7. IF x < 3 THEN.
  8. CONTINUE;

Which form of continue will exit any loop in PL SQL?

Oracle Database 11g offers a new feature for loops: the CONTINUE statement. Use this statement to exit the current iteration of a loop, and immediately continue on to the next iteration of that loop. This statement comes in two forms, just like EXIT: the unconditional CONTINUE and the conditional CONTINUE WHEN.

How is the loop index of a cursor FOR LOOP declared?

The cursor FOR LOOP statement implicitly declares its loop index as a record variable of the row type that a specified cursor returns, and then opens a cursor. With each iteration, the cursor FOR LOOP statement fetches a row from the result set into the record.

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.

How do you exit a loop in PL SQL?

Note: You must follow these steps while using PL/SQL Exit Loop.

  1. Initialize a variable before the loop body.
  2. Increment the variable in the loop.
  3. You should use EXIT WHEN statement to exit from the Loop. Otherwise the EXIT statement without WHEN condition, the statements in the Loop is executed only once.

What are the three kinds of loops in PL SQL?

Types of PL/SQL Loops

  • Basic Loop / Exit Loop.
  • While Loop.
  • For Loop.
  • Cursor For Loop.

What is difference between simple loop while loop & FOR LOOP?

The ‘for’ loop used only when we already knew the number of iterations. The ‘while’ loop used only when the number of iteration are not exactly known. If the condition is not put up in ‘for’ loop, then loop iterates infinite times. In ‘for’ loop the initialization once done is never repeated.

Can we use FOR LOOP in cursor?

Introduction to PL/SQL cursor FOR LOOP statement A nice feature of the cursor FOR LOOP statement is that it allows you to fetch every row from a cursor without manually managing the execution cycle i.e., OPEN , FETCH , and CLOSE . If there is no row to fetch, the cursor FOR LOOP closes the cursor.

What is loop in PL SQL?

The LOOP statement executes a sequence of statements within a PL/SQL code block multiple times. WHILE statement (PL/SQL) The WHILE statement repeats a set of SQL statements as long as a specified expression is true. The condition is evaluated immediately before each entry into the loop body.

What are the advantages of PL SQL block?

PL/SQL allows sending an entire block of statements to the database at one time. This reduces network traffic and provides high performance for the applications. PL/SQL gives high productivity to programmers as it can query, transform, and update data in a database.

Which loop will always be executed once?

do loop
The body of a do loop is always executed at least once. Almost always there are situations where a loop body should not execute, not even once. Because of this, a do loop is almost always not the appropriate choice.

How does the for loop statement in PL / SQL work?

PL/SQL FOR LOOP executes a sequence of statements a specified number of times. The PL/SQL FOR LOOP statement has the following structure: The index is an implicit variable. It is local to the FOR LOOP statement. In other words, you cannot reference it outside the loop. Inside the loop, you can reference index but you cannot change its value.

What is the continue when statement in PL / SQL?

PL/SQL CONTINUE WHEN statement. The CONTINUE WHEN statement exits the current loop iteration based on a condition and immediately continue to the next iteration of that loop. The syntax of CONTINUE WHEN statement is: CONTINUE WHEN condition; The condition in the WHEN clause is evaluated each time the CONTINUE WHEN statement is reached.

How is the current loop skipped in PL / SQL?

The condition in the WHEN clause is evaluated each time the CONTINUE WHEN statement is reached. If the condition is TRUE, the current loop is skipped, and control is transferred to the next iteration of the loop. If the condition is not TRUE, either FALSE or NULL, the CONTINUE WHEN statement does nothing.

How does the Cursor FOR loop statement work in SQL?

Introduction to PL/SQL cursor FOR LOOP statement. The cursor FOR LOOP statement an elegant extension of the numeric FOR LOOP statement. The numeric FOR LOOP executes the body of the loop once for every integer value in a specified range. Similarly, the cursor FOR LOOP executes the body of the loop once for each row returned by a query.