Can you do nested case statements in SQL?

Can you have multiple conditions in a case statement?

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 give multiple conditions in a case 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 you do multiple if statements in SQL?

We can specify multiple statements as well with SQL IF statement and BEGIN END blocks. In the following query, we want to print a message from two print statements once a condition is satisfied. Note: We should have an END statement with corresponding BEGIN block.

Can I use case in where clause SQL Server?

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.

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How many tables can be join in SQL query?

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 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).

Can we use CASE statement in WHERE clause?

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 CASE statement return multiple values?

@yzhang – With CASE only the first match will return values. If you want the possibility of multiple conditions mathcing each input row, you need to make each check indpendantly, and UNION the results together.

How do you write a multiple case statement in SQL select query?

You can get a nearly identical runtime and query plan by writing the query like this: 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.

Can case statement return multiple values in Oracle?

4 Answers. A CASE statement cannot return more than one value, it is a function working on one value.

How does SQL case work?

The SQL CASE Statement

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The CASE statement goes through conditions and returns a value when the first condition is met (like an if-then-else statement). So, once a condition is true, it will stop reading and return the result. If no conditions are true, it returns the value in the ELSE clause.

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