Can we use FOR LOOP in SQL query Oracle?

So, while Oracle SQL does not directly support while loops of for loops, there is extended syntax for looping within some stored procedures that are embedded into Oracle SQL.

Table of Contents

How do I run a SQL query in a FOR LOOP?

Syntax

The initial step is executed first, and only once. This step allows you to declare and initialize any loop control variables.
Next, the condition, i.e., initial_value ..
After the body of the for loop executes, the value of the counter variable is increased or decreased.
The condition is now evaluated again.

Can we use FOR LOOP in SQL query?

In SQL Server, there is no FOR LOOP. However, you simulate the FOR LOOP using the WHILE LOOP.

How do you create a loop in PL SQL?

PL/SQL For Loop Example 2

DECLARE.
VAR1 NUMBER;
BEGIN.
VAR1:=10;
FOR VAR2 IN 1..10.
LOOP.
DBMS_OUTPUT.PUT_LINE (VAR1*VAR2);
END LOOP;

How does FOR LOOP work in PL SQL?

In this loop structure, sequence of statements is enclosed between the LOOP and the END LOOP statements. At each iteration, the sequence of statements is executed and then control resumes at the top of the loop. Repeats a statement or group of statements while a given condition is true.

How do you loop through a string in PL SQL?

In the first line you define a table of any type you want. then create variable of that type and give it values with a kind of constructor. I initialized it in the declaration but it can be done also in the body of the Pl Sql. Then just loop over your array from first index to the last.

What are the 3 types of PL SQL statements?

PL/SQL has three categories of control statements: conditional selection statements, loop statements and sequential control statements.

What are the types of loops in PL SQL?

PL/SQL provides four kinds of loop statements: basic loop, WHILE loop, FOR loop, and cursor FOR loop. For usage information, see “Controlling Loop Iterations: LOOP and EXIT Statements”. A loop that executes an unlimited number of times. It encloses a sequence of statements between the keywords LOOP and END LOOP .

What is nested loop in PL SQL?

In a NESTED LOOPS join, Oracle reads the first row from the first row source and then checks the second row source for matches. All matches are then placed in the result set and Oracle goes on to the next row from the first row source. This continues until all rows in the first row source have been processed.

Which PL SQL loop executes series of statements repeatedly?

The iteration structure executes a sequence of statements repeatedly as long as a condition holds true. The sequence structure simply executes a sequence of statements in the order in which they occur.

What are the 3 types of loops in Plsql?

PL/SQL provides four kinds of loop statements: basic loop, WHILE loop, FOR loop, and cursor FOR loop.

What is loop statement in PL SQL?

The LOOP statement executes a sequence of statements within a PL/SQL code block multiple times. 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.

How does loop work in Oracle?

A loop that executes an unlimited number of times. It encloses a sequence of statements between the keywords LOOP and END LOOP . With each iteration, the sequence of statements is executed, then control resumes at the top of the loop. An EXIT , GOTO , or RAISE statement branches out of the loop.

How do I use two cursors in PL SQL?

DECLARE AA NUMBER; CURSOR S IS SELECT ENAME, SAL FROM EMP; CURSOR D IS SELECT ENAME, SAL FROM EMP; NAME EMP. ENAME%TYPE; SALARY EMP. SAL%TYPE; C NUMBER; BEGIN AA := :NUMBER_OF_EMP; SELECT COUNT(EMPNO) INTO C FROM EMP; OPEN S; FOR A IN 1..AA LOOP FETCH S INTO NAME, SALARY; DBMS_OUTPUT.

What are the types of PL SQL loops?

What are the PL SQL syntax?

PL/SQL identifiers are constants, variables, exceptions, procedures, cursors, and reserved words. The identifiers consist of a letter optionally followed by more letters, numerals, dollar signs, underscores, and number signs and should not exceed 30 characters.

Can we use basic loop in PL SQL?

Basic loop or simple loop is preferred in PL/SQL code when there is no surety about how many times the block of code is to be repeated. When we use the basic loop the code block will be executed at least once.

What are 3 types of loops in SQL?

Types of PL/SQL Loops

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

How many types of PL SQL loops are there?

four kinds

PL/SQL provides four kinds of loop statements: basic loop, WHILE loop, FOR loop, and cursor FOR loop.

Can we pass parameter to cursor?

An explicit cursor may accept a list of parameters. Each time you open the cursor, you can pass different arguments to the cursor, which results in different result sets. In the cursor query, each parameter in the parameter list can be used anywhere which a constant is used.

How many rows a cursor can hold in Oracle?

there is no limit (i’m aware of) to the number of rows a cursor can process. Obviously, if you try and process 50 million records from a cursor, your program won’t likely finish anytime soon.

Is Plsql easy?

PL/SQL is a powerful, yet straightforward database programming language. It is easy to both write and read, and comes packed with lots of out-of-the-box optimizations and security features.

What is PL SQL loop?

The PL/SQL loops are used to repeat the execution of one or more statements for specified number of times. These are also known as iterative control statements. Syntax for a basic loop: LOOP.

How many loops are there in Plsql?

What is difference between cursor and ref cursor?

A cursor is really any SQL statement that runs DML (select, insert, update, delete) on your database. A ref cursor is a pointer to a result set. This is normally used to open a query on the database server, then leave it up to the client to fetch the result it needs.

Can we use FOR LOOP in SQL query Oracle?