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case when switch in SQL

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Huggies Pants :) answered on November 12, 2020 Popularity 10/10 Helpfulness 2/10

answer case when switch in SQL

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case when switch in SQL

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-- Case Eg.) to retrive the MAX value of a Field 
-- if there are entries for the Field in table MAX value will be returned 
-- But if there is no entries at all for the Field in tabel MAX will return
-- Null as the output. But Using Case When we can check it out return zero 
-- or any other value if there is no enties for the Field in table..
SELECT 
CASE   -- Like Switch Case
	WHEN -- First When condition 
		(MAX(BILLID) IS NULL) -- Condition 
	THEN 1   -- output   (We can also add more When conditions like Above)
ELSE -- When WHEN Condition not Satisfied Below will be Executed. 
		(MAX(BILLID)) -- output
END 
as MAXBILLID   from  DUAL;
-- Final Output
-- If there is no entry in the Field for the table
-- BILLID
--  1
-- If there are entries MAX of that Field value from the table
-- BILLID
-- 10

Popularity 10/10 Helpfulness 2/10 Language sql

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Contributed on Nov 12 2020

Huggies Pants :)

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sql case when in

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CASE
    WHEN SUBSTRING(applications.pinfl, 1,1) IN ('3','5','7') THEN 'Erkak'
    WHEN SUBSTRING(applications.pinfl, 1,1) IN ('2','4','6') THEN 'Ayol'
    ELSE 'Topilmadi'
END as gender

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Contributed on Nov 15 2023

Shadow

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SQL CASE Statement

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SELECT order_id, customer_id,
CASE
    WHEN amount >= 400 THEN (amount - amount * 10/100)
END AS offer_price
FROM Orders;

Popularity 10/10 Helpfulness 3/10 Language sql

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Contributed on May 22 2022

SAMER SAEID

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CASE WHEN sql

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-2

SELECT column_name,
    CASE 
      WHEN boolean_condition THEN 'Result_1'
      WHEN boolean_condition THEN 'Result_2'
      ELSE 'Result_3'
    END AS result_column_name
 FROM table_name_1  
 LEFT JOIN table_name_2 ON
 	CASE 
      WHEN boolean_condition THEN 'Boolean_Result_1'
      WHEN boolean_condition THEN 'Boolean_Result_2'
      ELSE 'Boolean_Result_3'
    END;

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Contributed on Oct 31 2023

Nice Narwhal

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case statement in sql

Comment

Case Statement basically
Like IF - THEN - ELSE statement.

The CASE statement goes through conditions
and returns a value when the
first condition is met and
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.

If there is no ELSE part and
no conditions are true, it returns NULL.

FOR EXAMPLE =

CASE
    WHEN condition1 THEN result1
    WHEN condition2 THEN result2
    WHEN conditionN THEN resultN
    ELSE result
END 

-- example:
SELECT 
	CASE
      WHEN (1+6 = 6) THEN 'A'
      WHEN (1+6 = 7) THEN 'B'
      WHEN (1+6 = 8) THEN 'C'
      ELSE 'D'
	END 
FROM DUAL;

Result would be 'B' since it is the first
correct answer

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Contributed on Dec 23 2020

Obedient Ocelot

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case when select sql

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-1

SELECT column1, column2,
  CASE
    WHEN condition1 THEN value1
    WHEN condition2 THEN value2
    ELSE value3
  END AS result_column
FROM your_table;

Popularity 9/10 Helpfulness 1/10 Language sql

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Contributed on Sep 12 2023

YOU.com

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case when switch in SQL

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