Question: What can be used instead of case in SQL?

Question: What is Alternative to CASE Statement in SQL Server? Answer: IIF Function.

Can we use and in CASE statement in SQL?

CASE must include the following components: WHEN , THEN , and END . ELSE is an optional component. You can make any conditional statement using any conditional operator (like WHERE ) between WHEN and THEN . This includes stringing together multiple conditional statements using AND and OR .

Which is better case or if else in SQL?

CASE statements are preferred because: SQL: They are ANSI standard, making it portable to other databases without need for alteration. they support “short circuiting”

Can we write case without else?

3 Answers. You can use a WHERE clause to restrict the output. Or if you wanted to showcase some other value instead of null use an else part inside the CASE statement.

What is SQL case?

The case statement in SQL returns a value on a specified condition. We can use a Case statement in select queries along with Where, Order By, and Group By clause. It can be used in the Insert statement as well. … In Case statement, we defined conditions. Once a condition is satisfied, its corresponding value is returned.

IT IS INTERESTING:  Best answer: How do I check CPU usage in SQL?

How do you write a case statement in SQL query?

SQL CASE Statement

  1. CASE. WHEN condition1 THEN result1. WHEN condition2 THEN result2. WHEN conditionN THEN resultN. ELSE result. …
  2. Example. SELECT OrderID, Quantity, CASE. WHEN Quantity > 30 THEN ‘The quantity is greater than 30’ …
  3. Example. SELECT CustomerName, City, Country. FROM Customers. ORDER BY.

How do I do an if statement in SQL?

The IF statement is logically equivalent to a CASE statements with a searched-case-statement-when clause. The IF statement supports the use of optional ELSE IF clauses and a default ELSE clause. An END IF clause is required to indicate the end of the statement.

When can you use case in SQL?

Both formats support an optional ELSE argument. CASE can be used in any statement or clause that allows a valid expression. For example, you can use CASE in statements such as SELECT, UPDATE, DELETE and SET, and in clauses such as select_list, IN, WHERE, ORDER BY, and HAVING.

Is Empty in SQL?

Use the IS [NOT] EMPTY conditions to test whether a specified nested table is empty, regardless whether any elements of the collection are NULL . The condition returns a boolean value: TRUE for an IS EMPTY condition if the collection is empty, and TRUE for an IS NOT EMPTY condition if the collection is not empty.

Is null in case SQL?

SQL offers two case abbreviations to cope with null : coalesce and nullif . Both are used like functions and do not use the keywords case , when , then , else and end .

Is else mandatory in case statement?

1 Answer. You do not need an else clause. If one isn’t specified, case will return null .

IT IS INTERESTING:  What is garbage collection in Java how it is helpful?

How do you write NOT NULL in SQL query?

The IS NOT NULL condition is used in SQL to test for a non-NULL value. It returns TRUE if a non-NULL value is found, otherwise it returns FALSE. It can be used in a SELECT, INSERT, UPDATE, or DELETE statement.

What is Nullif SQL Server?

In SQL Server (Transact-SQL), the NULLIF function compares expression1 and expression2. If expression1 and expression2 are equal, the NULLIF function returns NULL. Otherwise, it returns the first expression which is expression1.

How do you write multiple cases in SQL?

SELECT (case A. column1 when ‘1’ then (select value from B where B. clientId=100 and ‘1’=B.Id) when ‘2’ then (select value from C where C.

How many tables we can join in SQL?

Theoretically, there is no upper limit on the number of tables that can be joined using a SELECT statement. (One join condition always combines two tables!) However, the Database Engine has an implementation restriction: the maximum number of tables that can be joined in a SELECT statement is 64.

How does between work in SQL?

The SQL BETWEEN condition allows you to easily test if an expression is within a range of values (inclusive). The values can be text, date, or numbers. It can be used in a SELECT, INSERT, UPDATE, or DELETE statement.

Secrets of programming