Question: Can We Use Select Statement In Case Oracle?

Can we use subquery in case statement?

When a subquery is placed within the column list it is used to return single values.

In this case, you can think of the subquery as a single value expression.

The result returned is no different than the expression “2 + 2.” Of course, subqueries can return text as well, but you get the point!.

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.

What is the alternative for CASE statement in SQL?

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

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

insert into table table_name ( value1, value 2,value 3) select (value 1,value2 , case value3 when value1 = ‘somevalue’ &&* value2 = ‘somevalue’ then ‘x’ else ‘y’ End from table_name.

What is select statement in Oracle?

The Oracle SELECT statement is used to retrieve records from one or more tables in an Oracle database.

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 .

How do you write a case statement in SQL?

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

Can we use CASE statement in update query?

The CASE expression allows a statement to return one of several possible results, depending on which of several condition tests evaluates to TRUE. You must include at least one WHEN clause within the CASE expression; subsequent WHEN clauses and the ELSE clause are optional.

How do you write a case statement?

The steps involved in writing your Case Statement: your mission statement and all other strategic materials (strategic plan, vision statement, etc.) your financial data (financial statements, fund usage, gaps, etc.) program analysis, reports, etc. (what worked and what didn’t work in the past)

How can use two conditions in case statement in SQL?

If so, I’ll show you 3 different ways to apply case statements:(1) For a single condition: CASE WHEN condition1 THEN result1 ELSE result2 END AS new_field_name.(2) For multiple conditions using AND: CASE WHEN condition1 AND condition2 THEN result1 ELSE result2 END AS new_field_name.More items…•

Can we use select in case statement?

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. Look at the following example; We declared a variable @ProductID and specified value 1 for it. …