SQL Subquery and JOIN

SAMER SAEID answered on April 3, 2020 Popularity 10/10 Helpfulness 2/10

answer SQL Subquery and JOIN

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SQL Subquery and JOIN

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SELECT DISTINCT Customers.customer_id, Customers.first_name
FROM Customers
INNER JOIN Orders
ON Customers.customer_id = Orders.customer_id
ORDER BY Customers.customer_id;

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Contributed on May 22 2022

SAMER SAEID

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sql join on a subquery

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SELECT * 
FROM
( SELECT ... FROM ... ) q1

INNER JOIN

( SELECT ... FROM ... ) q2

ON q1.colname = q2.colname

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Source: stackoverflow.com

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Contributed on Apr 03 2020

Embarrassed Elk

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sql join subquery

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SELECT
  s.studentid,
  s.studentname,
  s.gender,
  GROUP_CONCAT(DISTINCT ss.subjectName) AS subjectNames,
  (
    SELECT GROUP_CONCAT(DISTINCT name)
    FROM games
    WHERE FIND_IN_SET(games.id, s.fkgameid)
  ) AS game_names,
  GROUP_CONCAT(DISTINCT ss.marks) AS marks,
  GROUP_CONCAT(DISTINCT sc.city) AS cities,
  GROUP_CONCAT(DISTINCT sc.province) AS provinces,
  s.image
FROM student s
LEFT JOIN studentsubject ss ON s.studentid = ss.fkstudentid
LEFT JOIN studentcity sc ON s.studentid = sc.fkstudentid
WHERE s.studentid = '1'
GROUP BY s.studentid, s.studentname, s.gender, s.image, s.fkgameid;

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Contributed on Oct 04 2023

Ghayour Ahmad

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sql join on a subquery

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	(select coalesce((select name from object_value where object_id = addtl_type.id 
    and object_type_id = @object_type_des_UDF
    and language_id = @language_id),addtl_type.name) from addtl_type
    where id = (select n_value from pr_addtl_data where pr_id = PR.ID and 
    data_field_id = (select id from data_fields where name = 'Category'))) as 'Category',

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Tags: join sql subquery

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Contributed on Mar 15 2022

Gopinath Basker

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SQL Subquery and JOIN

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