Frequent question: How do you write or condition in a case statement in SQL?

Can we use or condition in case statement in SQL?

It is practically not possible to use OR statement in CASE statement as the structure of the CASE statement is very different.

How do you write a case condition in SQL?

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. (CASE.

How do you write two conditions in a case statement in SQL?

Here are 3 different ways to apply a case statement using SQL:

  1. (1) For a single condition: CASE WHEN condition_1 THEN result_1 ELSE result_2 END AS new_field_name.
  2. (2) For multiple conditions using AND: CASE WHEN condition_1 AND condition_2 THEN result_1 ELSE result_2 END AS new_field_name.

Can we use and condition in case?

No. It’s not possible because a case must be a constant expression.

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Can we use where in case?

You can use a CASE Statement anywhere a valid expression is used within the SELECT statement such as the WHERE clause’s filter criteria.

Can we write CASE statement in where clause?

CASE STATEMENT IN WHERE CLAUSE:

We can use a case statement in Where, Order by and Group by clause. … So, by using a CASE statement with the where condition displays the result.

How does case work in SQL?

Summary:

  1. CASE WHEN is used to determine conditional statements in SQL. CASE declares the start of the conditions. WHEN declares a condition. THEN declares the return of a true condition. …
  2. You can have a multitude of WHEN statements.
  3. AS can be used to create a header for the return data, otherwise it is given the header “case”

Which statement is used in case of multiple conditions?

SQL case statement with multiple conditions is known as the Search case statement. So, You should use its syntax if you want to get the result based upon different conditions -.

How do you use multiple values in a case statement?

SQL:2003 standard allows to define multiple values for simple case expression: SELECT CASE c. Number WHEN ‘1121231’,’31242323′ THEN 1 WHEN ‘234523’,’2342423′ THEN 2 END AS Test FROM tblClient c; It is optional feature: Comma-separated predicates in simple CASE expression“ (F263).

How do you write multiple conditions in an if statement in SQL Server?

Multiple IF conditions using ELSE

  1. — test if a condition is true. IF (condition is true) BEGIN.
  2. DO THING A. DO THING B. END.
  3. ELSE. BEGIN. DO THING C.
  4. DO THING D. DO THING E. END.
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Can we use CASE statement in update query?

I have SQL server Table in which there is column that I wanted to update according to a 2 columns value that are present in current row. In this scenario, we can use CASE expression. CASE statement works like IF-THEN-ELSE statement. …