case sql

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Junior Cercado V. answered on April 17, 2020 Popularity 10/10 Helpfulness 4/10

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-- syntaxis: (BY Junior Cercado)
CASE
    WHEN condition1 THEN result1
    WHEN condition2 THEN result2
    WHEN conditionN THEN resultN
    ELSE result
END

Popularity 10/10 Helpfulness 4/10 Language sql

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Contributed on Nov 21 2023

Junior Cercado V.

0 Answers Avg Quality 2/10

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sql case

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-- NOTE: this is for SQL-Oracle specifically

/*
NB: Please like Mingles444 post, I derived this from him/her
*/

-- syntax: (Retrieved from grepper:Mingles444)
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;

-- OUTPUT: B

Popularity 10/10 Helpfulness 5/10 Language sql

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Contributed on Apr 17 2020

Jacques_Kirstein

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sql case

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Change query output depending on conditions.
Example: Returns users and their subscriptions, along with a new column
called activity_levels that makes a judgement based on the number of
subscriptions.
SELECT first_name, surname, subscriptions
CASE WHEN subscriptions > 10 THEN 'Very active'
WHEN Quantity BETWEEN 3 AND 10 THEN 'Active'
ELSE 'Inactive'
END AS activity_levels
FROM users;

Popularity 10/10 Helpfulness 3/10 Language sql

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Contributed on Jan 07 2021

Lorenzo Satta Chiris

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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;

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Contributed on May 22 2022

SAMER SAEID

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case sql

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SELECT
season,
ROUND(AVG(
    CASE         -- Start CASE
        WHEN hometeam_id = 8455 AND home_goal > away_goal THEN 1
        WHEN hometeam_id = 8455 AND home_goal < away_goal THEN 0
        ELSE NULL
    END          -- End CASE
        ), 2) AS pct_homewins,
FROM table_name
WHERE hometeam_id = 8455 OR awayteam_id = 8455  -- ADVISED : make sure to filter, else the new column will contain many NULLS with all data
GROUP BY season;

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Contributed on Jan 26 2024

Innocent Iguana

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SQL CASE

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SELECT customer_id, first_name,
CASE
  WHEN age >= 18 THEN 'Allowed'
END AS can_vote
FROM Customers;

Popularity 10/10 Helpfulness 2/10 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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