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.
How do I run a FOR LOOP in Oracle?
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.
What are 3 types of loops in SQL?
Explain Different Types of Loops in PL/SQL
- The simple or infinite loop.
- The FOR loop.
- The WHILE loop.
How do you write a WHILE loop in SQL?
SQL While loop syntax END; The while loop in SQL begins with the WHILE keyword followed by the condition which returns a Boolean value i.e. True or False. The body of the while loop keeps executing unless the condition returns false. The body of a while loop in SQL starts with a BEGIN block and ends with an END block.
What are Oracle loops?
The LOOP statement executes the statements in its body and returns control to the top of the loop. Typically, the body of the loop contains at least one EXIT or EXIT WHEN statement for terminating the loop. Otherwise, the loop becomes an infinite loop.
What can a cursor FOR LOOP use?
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.
How do you repeat a SQL query?
MySQL REPEAT() Function
- Repeat a string 3 times: SELECT REPEAT(“SQL Tutorial”, 3);
- Repeat the text in CustomerName 2 times: SELECT REPEAT(CustomerName, 2) FROM Customers;
- Repeat the string 0 times: SELECT REPEAT(“SQL Tutorial”, 0);
Is SQL a Turing complete language?
Even pure functional languages are Turing-complete. Turing completeness in declarative SQL is implemented through recursive common table expressions. Unsurprisingly, procedural extensions to SQL (PLSQL, etc.) are also Turing-complete.
How many types of loops are there in Oracle?
four kinds
PL/SQL provides four kinds of loop statements: basic loop, WHILE loop, FOR loop, and cursor FOR loop.
How do you create a loop in SQL Server?
I am detailing answer on ways to achieve different types of loops in SQL server.
- FOR Loop. DECLARE @cnt INT = 0; WHILE @cnt < 10 BEGIN PRINT ‘Inside FOR LOOP’; SET @cnt = @cnt + 1; END; PRINT ‘Done FOR LOOP’;
- DO.. WHILE Loop.
- REPEAT..UNTIL Loop.