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How do you use multiple while loops in SQL?
Step 1: First, it checks for the condition inside the first While loop.
- If the expression result is True, the begin and end code block inside the While loop will execute. Next, it will start the second While loop. Go to Step 2.
- If the result is False, it will exit from While Loop.
How do I select all columns in a database?
You can use following query to list all columns or search columns across tables in a database. USE AdventureWorks GO SELECT t.name AS table_name, SCHEMA_NAME(schema_id) AS schema_name, c.name AS column_name FROM sys. tables AS t INNER JOIN sys. columns c ON t.
Which is an example of a while loop in SQL?
If the result of the condition is true, the SQL statement will be executed. Otherwise, the code flow will exit the loop. If any SQL statement exists outside the loop, it will be executed. The syntax of the WHILE loop in SQL looks like as follows: {…statements…} After these explanations, we will give a very simple example of a WHILE loop in SQL.
How to loop through all records in SQL Server?
Loop through all records in Sql server with while statement Foreach is the common functionality in all programming language. Foreach is used for traversing items in a collection. Unlike for loop constructs which maintains a counter to loop defined number of times, foreach will essentially loop through all the items in the collection.
When to use break statement in SQL while loop?
BREAK statement. BREAK statement is used in the SQL WHILE loop in order to exit the current iteration of the loop immediately when certain conditions occur. In the generally IF…ELSE statement is used to check whether the condition has occurred or not.
When does the SQL statement exit the loop?
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. If the result of the condition is true, the SQL statement will be executed. Otherwise, the code flow will exit the loop. If any SQL statement exists outside the loop, it will be executed.