What is a case statement in SQL?
Oct 07, 2021 · Nope! Although it is most often used there, CASE is not limited to SELECT statements. For example, you can use it in clauses like IN, WHERE, HAVING, and ORDER BY. Using a CASE statement in a query once doesn’t mean you have hit your quota for using it. You can use it multiple times in a single query. Or you can use it just once.
When to use a case statement to perform a sort operation?
The ORDER BY clause is as below : ORDER BY CASE WHEN TblList.PinRequestCount <> 0 THEN TblList.PinRequestCount desc, TblList.LastName ASC, TblList.FirstName ASC, TblList.MiddleName ASC END, CASE WHEN TblList.HighCallAlertCount <> 0 THEN TblList.HighCallAlertCount desc, TblList.LastName ASC, TblList.FirstName ASC, …
When to use the ORDER BY clause?
Dec 16, 2018 · 0. 1585. A CASE statement is an expression to evaluate different conditions and return a scalar value when a condition is met. If none of the condition evaluated to TRUE it will return a value from ELSE block which is optional. ORDER BY clause used to sort the values in either ascending or descending order. A practical situation arises when we need to use a CASE …
Why would you use a where clause in a case statement?
We can use Case statement with order by clause as well. In SQL, we use Order By clause to sort results in ascending or descending order. Click to see full answer. In respect to this, dO CASE statements go in order? A CASE statement is an expression to evaluate different conditions and return a scalar value when a condition is met.
Do SQL CASE statements go in order?
"The CASE statement evaluates its conditions sequentially and stops with the first condition whose condition is satisfied."Jul 2, 2014
Which function can you use with ORDER BY clause?
The ORDER BY keyword is used to sort the result-set in ascending or descending order. The ORDER BY keyword sorts the records in ascending order by default. To sort the records in descending order, use the DESC keyword.
How do you use ORDER BY clause with SQL statement?
Syntax. SELECT column-list FROM table_name [WHERE condition] [ORDER BY column1, column2, .. columnN] [ASC | DESC]; You can use more than one column in the ORDER BY clause.
Which two statements are true about the ORDER BY clause?
The sort is in ascending by order by default.The sort is in descending order by default.The ORDER BY clause must precede the WHERE clause.The ORDER BY clause is executed on the client side.The ORDER BY clause comes last in the SELECT statement.The ORDER BY clause is executed first in the query execution.
A simple CASE statement expression
In this format, we evaluate one expression against multiple values. In a simple case statement, it evaluates conditions one by one. Once the condition and expression are matched, it returns the expression mentioned in THEN clause.
The CASE statement and comparison operator
In this format of a CASE statement in SQL, we can evaluate a condition using comparison operators. Once this condition is satisfied, we get an expression from corresponding THEN in the output.
Case Statement with Order by clause
We can use Case statement with order by clause as well. In SQL, we use Order By clause to sort results in ascending or descending order.
Case Statement in SQL with Group by clause
We can use a Case statement with Group By clause as well. Suppose we want to group employees based on their salary. We further want to calculate the minimum and maximum salary for a particular range of employees.
Update statement with a CASE statement
We can use a Case statement in SQL with update DML as well. Suppose we want to update Statecode of employees based on Case statement conditions.
Insert statement with CASE statement
We can insert data into SQL tables as well with the help of Case statement in SQL. Suppose we have an application that inserts data into Employees table. We get the following values for gender.
