How do I do a WHILE LOOP in SQL Server?
How do I do a WHILE LOOP in SQL Server?
SQL While loop syntax 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.
Does SQL have WHILE LOOP?
The WHILE statement defines a set of statements to be executed until a condition that is evaluated at the beginning of the WHILE loop is false. The while-loop-condition (an expression) is evaluated before each iteration of the loop.
How do you write a loop in SQL?
The Basic Syntax of a WHILE Loop
- –This variable keeps track of how many times the loop has run.
- DECLARE @Counter INT.
- SET @Counter = 0.
- –The loop begins by checking a condition is met.
- –Here we check that the counter has not exceeded 10.
- WHILE @Counter <= 10.
- –When the condition is met, the loop is entered.
Can we use for loop in SQL Server?
In SQL Server, there is no FOR LOOP. However, you simulate the FOR LOOP using the WHILE LOOP.
What is while loop in SQL?
SQL WHILE loop provides us with the advantage to execute the SQL statement(s) repeatedly until the specified condition result turn out to be false. As you can see, in each iteration of the loop, the defined condition is checked, and then, according to the result of the condition, the code flow is determined.
What is while loop in SQL Server?
What is the purpose of triggers?
Triggers are used to maintain the referential integrity of data by changing the data in a systematic fashion. Each trigger is attached to a single, specified table in the database. Triggers can be viewed as similar to stored procedures in that both consist of procedural logic that is stored at the database level.
What are the difference between for loop and while loop?
For loop vs While loop The difference between for loop and while loop is that in for loop the number of iterations to be done is already known and is used to obtain a certain result whereas in while loop the command runs until a certain condition is reached and the statement is proved to be false.
How do I kill process in SQL Server?
To kill a blocking process using this method, open SQL Server Management Studio and connect to your SQL Server instance. After you have connected, right click on the instance name and select ‘Activity Monitor’ from the menu. Once Activity Monitor has loaded, expand the ‘Processes’ section.
What is while loop in PL/SQL?
Description. In Oracle,you use a WHILE LOOP when you are not sure how many times you will execute the loop body and the loop body may not execute even
Do WHILE LOOP examples?
The various parts of the do-while loop are: Test Expression: In this expression we have to test the condition. If the condition evaluates to true then we will execute the body of the loop and go to update expression. Otherwise, we will exit from the while loop. Example: i <= 10
How do I copy a SQL database to another server?
Let’s have a look: First of all, launch the SQL Server Management Studio from Object Explorer and connect to the Source Server Now, right-click on database, select an option Tasks, and then, choose Copy Database option After clicking on the Copy Database Wizard then, the following screen will appear. Press Next button
