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Editorial Team
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Asked: 2026-05-13T15:46:22+00:00

I have two tables user_raters: | id(int) | to_id(int) | value(int) | created_at(datetime) |1

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I have two tables

user_raters:

| id(int) | to_id(int) | value(int) | created_at(datetime)
|1        | 2          | 1          | 2009-03-01 00:00:00

EDIT: I changed the user_rater_id. history_user_raters.user_rater_id is related to user_raters.id

history_user_raters:

| id(int) | user_rater_id(int) | value(int) | created_at(datetime)
| 1       | 1                  | 1          | 2009-03-02 00:00:00
| 2       | 1                  | 1          | 2009-03-02 00:00:00
| 3       | 1                  | -1         | 2009-03-02 00:00:00
| 4       | 1                  | 1          | 2009-03-03 00:00:00
| 5       | 1                  | -1         | 2009-03-03 00:00:00
| 6       | 1                  | -1         | 2009-03-03 00:00:00
| 7       | 1                  | -1         | 2009-03-03 00:00:00

I want to count the sum of the values from history_user_raters as it relates to the to_id from user_raters. The result from the query should be:

| year | month | day | total | down | up
| 2009 | 3     | 2   | 1     | 1    | 2
| 2009 | 3     | 3   | -2    | 3    | 1

I have a query that is close, but it is not counting the up and down correctly. The total is right. Can some one help me write the query or new query that calculates correct up and down?

My current query:

SELECT 
 YEAR(history.created_at) AS `year`,
 MONTH(history.created_at) AS `month`,
 DAY(history.created_at) AS `day`,
 SUM(history.value) as `total`,

 (SELECT 
  abs(SUM(historydown.value)) 
 FROM `user_raters` as raterdown 
  INNER JOIN `history_user_raters` AS historydown 
 WHERE raterdown.to_id = 2 
  AND historydown.value = -1 
  AND date(historydown.created_at) 
 GROUP BY history.created_at) as down,

 (SELECT SUM(historyup.value) 
 FROM `user_raters` as raterup 
  INNER JOIN `history_user_raters` AS historyup 
 WHERE raterup.to_id = 2 
  AND historyup.value = 1  
  AND date(history.created_at) 
 GROUP BY raterup.to_id) as up 

FROM `user_raters` 
 INNER JOIN history_user_raters AS history ON user_raters.id = history.user_rater_id
WHERE (user_raters.to_id = 2) 
GROUP BY DATE(history.created_at)
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1 Answer

  1. Editorial Team

    I might see it too simply (and sorry I can’t test with data at the moment), but I’m guessing the following trick with two CASE statements would do just what is needed

    SELECT 
  YEAR(history.created_at) AS year,
  MONTH(history.created_at) AS month,
  DAY(history.created_at) AS day,
  SUM(history.value) as total,
  SUM(CASE WHEN history.value < 0 THEN history.value ELSE 0 END) as down,
  SUM(CASE WHEN history.value > 0 THEN history.value ELSE 0 END) as up
FROM `user_raters` 
INNER JOIN `history_user_raters` AS history
  ON user_raters.id = history.user_rater_id
WHERE (user_raters.to_id = 1)  -- or some other condition...
GROUP BY DATE(history.created_at)
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