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Sum, Subtract and Join of multiple mysql table columns


By : user2175103
Date : October 16 2020, 08:10 AM
With these it helps Because you have multiple transactions, other loan amounts and payments per customer, you can't do a straight JOIN of the tables to each other as it will cause replication of rows, resulting in incorrect values. Instead, we SUM all the values within each table on a client basis before doing the JOIN. Additionally, since some clients don't have entries in each table, you must use LEFT JOINs and COALESCE on the results so that empty rows don't cause SUMs to become NULL. This query should give you the results you want:
code :
SELECT c.id, c.name,
       COALESCE(t.transactions, 0) + COALESCE(o.amounts, 0) - COALESCE(p.payments, 0) AS amount
FROM client c
LEFT JOIN (SELECT id, SUM(load_amount) + SUM(additional) AS transactions
           FROM transaction
           GROUP BY id) t on t.id = c.id
LEFT JOIN (SELECT id, SUM(amount) AS amounts
           FROM other_loan
           GROUP BY id) o ON o.id = c.id
LEFT JOIN (SELECT id, SUM(payment_amount) AS payments
           FROM payment
           GROUP BY id) p ON p.id = c.id
GROUP BY c.id
id  name        amount
1   Robin       8718
2   Cinderella  21
3   Leomar      0


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Join multiple columns on MySQL table


By : user3165123
Date : March 29 2020, 07:55 AM
will help you For your use case, you need to use the GROUP_CONCAT function: http://www.percona.com/blog/2013/10/22/the-power-of-mysqls-group_concat/. The query would look something like:
code :
SELECT et.id, CONCAT(l.first_name, ' ', l.last_name) 'team_leader', GROUP_CONCAT(DISTINCT CONCAT(r.first_name, ' ', r.last_name)), et.last_updated
FROM employee_timesheet et
INNER JOIN employees_timesheet_sign_off_roms etr ON et.id = etr.timesheet_id
INNER JOIN roms r ON etr.rom_id = r.id
LEFT JOIN employees_timesheet_sign_off_team_leaders etl ON et.id = etl.timesheet_id
LEFT JOIN team_leaders l ON etl.team_leader_id = l.id
GROUP BY et.id, team_leader, et.last_updated

MYSQL Join tables where second table is used in multiple columns on table 1


By : Alex
Date : March 29 2020, 07:55 AM
hop of those help? Using your existing schema, you will need to join Meals to Ingredients 5 times:
code :
SELECT mealName,
    hearts,
    i1.*,
    i2.*,
    i3.*,
    i4.*,
    i5.*,
FROM Meals m
    INNER JOIN Ingredients i1
        ON m.ingredient1 = i1.ingredientId
    INNER JOIN Ingredients i2
        ON m.ingredient2 = i2.ingredientId
    INNER JOIN Ingredients i3
        ON m.ingredient3 = i3.ingredientId
    INNER JOIN Ingredients i4
        ON m.ingredient4 = i4.ingredientId
    INNER JOIN Ingredients i5
        ON m.ingredient5 = i5.ingredientId
id, meal_name, hearts
meal_id, ingredient_id
SELECT m.name,
    i.ingredient
FROM Meals m
    INNER JOIN MealIngredients mi
        ON m.id = mi.meal_id
    INNER JOIN Ingredients i
        ON mi.ingredient_id = i

MySQL join multiple columns from same table


By : hsimo Frank
Date : March 29 2020, 07:55 AM
wish of those help You don't actually need to join for this - you can instead make three separate selects.

MySQL next row ORDER BY multiple columns JOIN table 2


By : Muhamed Shabeer
Date : March 29 2020, 07:55 AM
will help you I need help limiting the results set of this query. , We can do that using a single query as follows

Join two tables and subtract multiple columns


By : Dayna
Date : March 29 2020, 07:55 AM
I wish this helpful for you You're missing a coma in your SELECT and your join should be on Table_b
code :
 SELECT Table_a.Id_num,
         (Table_a.Val1 - Table_b.Val1) as Val1,
         (Table_a.Val2 - Table_b.Val2) as Val2,
         (Table_a.Val3 - Table_b.Val3) as Val3
    FROM Table_a
    INNER JOIN Table_b on Table_b.Id_num = Table_a.Id_num;
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