I have table with data like this
code | month | sales | value
1 | 1 | 1 | 4
1 | 1 | 2 | 2
1 | 2 | 1 | 2
2 | 1 | 1 | 4
and I want to group the data like this
code | month | sales | value
1 | 1 | 1 | 6
1 | 1 | 2 | 2
2 | 1 | 1 | 4
so far I have this mysql query
SELECT code,month,sales,sum(value) as value FROM data GROUP BY code
but it only gives this result
code | month | sales | value
1 | 1 | 1 | 8
2 | 1 | 1 | 4
Any suggestion please?
These will give u expected result:
SELECT code,month,sales,sum(value) as value FROM data GROUP BY code, sales
Related
How to select rows which are not defined? Like row 2 have undefined day 3 and row 3 have undefined day 1. I want them to be 0 in result set.
+----+-----+-------+
| id | day | count |
+----+-----+-------+
| 1 | 1 | 262 |
| 1 | 2 | 685 |
| 1 | 3 | 984 |
| 2 | 1 | 692 |
| 2 | 2 | 962 |
| 3 | 2 | 355 |
| 3 | 3 | 741 |
+----+-----+-------+
EDIT:
I want select count from days 1, 2 and 3 (not whole table) and display 0 on undefined day.
We can get all unique id values in a Derived Table.
For day, you seem to want only 1,2 and 3 only. So we can directly consider these values only using UNION ALL.
CROSS JOIN between them to get all possible combinations.
LEFT JOIN from all_combinations table to the main table on id and day.
We can use Coalesce() function to consider 0 value for count, for the cases where there is no matching row in the main table
Try the following:
SELECT all_combinations.id,
all_combinations.day,
COALESCE(t.count, 0) AS count
FROM
(
SELECT ids.id, days.day
FROM
(SELECT DISTINCT id FROM your_table) AS ids
CROSS JOIN
(SELECT 1 AS day UNION ALL SELECT 2 UNION ALL SELECT 3) AS days
) AS all_combinations
LEFT JOIN your_table AS t
ON t.id = all_combinations.id AND
t.day = all_combinations.day
Result:
| id | day | count |
| --- | --- | ----- |
| 1 | 1 | 262 |
| 2 | 1 | 692 |
| 3 | 1 | 0 |
| 1 | 2 | 685 |
| 2 | 2 | 962 |
| 3 | 2 | 355 |
| 1 | 3 | 984 |
| 2 | 3 | 0 |
| 3 | 3 | 741 |
View on DB Fiddle
I have all those tables above.
car_model_tbl
-----------------------------
id | car_model_name|status |
-----------------------------
1 | seria_1 | 1 |
-----------------------------
2 | golf_4 | 1 |
-----------------------------
3 | C_Class | 1 |
-----------------------------
4 | golf_5 | 1 |
-----------------------------
5 | seria_2 | 0 |
-----------------------------
car_manufacturer_tbl
-------------------------
id |car_manufactu_name |
-------------------------
1 | bmw |
-------------------------
2 | volkswagen |
-------------------------
3 | mercedes |
-------------------------
car_service_tbl
---------------------------------
id | model_id| service_date |
---------------------------------
1 | 1 | 2018-03-10 |
---------------------------------
2 | 2 | 2018-02-10 |
---------------------------------
3 | 1 | 2018-01-10 |
---------------------------------
4 | 1 | 2017-12-10 |
---------------------------------
5 | 2 | 2017-12-10 |
---------------------------------
6 | 3 | 2018-02-10 |
---------------------------------
7 | 2 | 2018-01-10 |
---------------------------------
9 | 4 | 2018-03-10 |
---------------------------------
10 | 4 | 2018-02-10 |
---------------------------------
11 | 5 | 2018-02-10 |
---------------------------------
car_model_manufacturer_relation
-------------------------------------------------
id | model_id | manufactu_id| service_status |
-------------------------------------------------
1 | 1 | 1 | 1 |
-------------------------------------------------
2 | 5 | 1 | 1 |
-------------------------------------------------
3 | 2 | 2 | 1 |
-------------------------------------------------
4 | 4 | 1 | 1 |
-------------------------------------------------
5 | 2 | 2 | 1 |
-------------------------------------------------
6 | 3 | 3 | 1 |
-------------------------------------------------
I need to update car_model_manufacturer_relation.service_status = '0'
where car_service_tbl.service_date < "2018-03-01".
In this case car_model_manufacturer_relation.service_status of models 2, 3 and 5 should be set to '0' because every car_service_tbl.service_date for these models is smaller than "2018-03-01".
However, for models 1 and 4 car_model_manufacturer_relation.service_status should stay '1' because even that they have records smaller than "2018-03-01" they also have bigger dates ex. "2018-03-10".
I am trying to create a query for this but until now without success.
You'll need to nest a grouped query, to get the MAX date per model, and update from that.
update car_model_manufacturer_relation as cmmr,
(select model_id, max(service_date) as check_date
from car_service_tbl
group by model_id) as cst
set cmmr.service_status = '0'
where cmmr.model_id = cst.model_id
and cst.check_date < "2018-03-01"
Where you're using more than one table and the table names include underscores, I try and alias the tables to make the code a little shorter and easier on the eye, hence the use of cmmr and cst as table aliases.
The MAX date has also been renamed for clarity as check_date. You can of course name this anything you wish.
With sub query:
UPDATE car_model_manufacturer_relation c
LEFT join (SELECT model_id, service_date FROM car_service_tbl ORDER BY service_date DESC LIMIT 1) as s ON s.model_id = c.model_id
SET service_status=0
WHERE c.service_date < "2018-03-01"
#tyro - be careful with your solution, as a LEFT JOIN would update the service status to 0 when there wasn't a service date within the car_service_tbl. You would need to use a full join, rather than just the LEFT JOIN as you suggested in order to update the records correctly I feel.
I have two mysql tables.
table-1: table-item:
id | itemid | itemname | catid
---------------------------------
1 | 1 | Pen | 1
2 | 2 | Pencil | 1
3 | 3 | Sharpner | 1
4 | 4 | Book | 2
5 | 5 | Khata | 2
6 | 6 | Bag | 3
7 | 7 | File | 3
---------------------------------
table-2: yearly-item:
id | itemid |catid| year
-----------------------------
1 | 1 | 1 | 2015
2 | 3 | 1 | 2015
3 | 4 | 2 | 2015
4 | 6 | 3 | 2015
5 | 1 | 2 | 2016
6 | 1 | 1 | 2016
------------------------------
I want to get a list of items of catid-1 from table-item for the year-2016 which is not present in yearly-item table.
id | itemid | itemname | catid
---------------------------------
2 | 2 | Pencil | 1
3 | 3 | Sharpner | 1
---------------------------------
for that purpose, while executing this query:
SELECT * FROM table_item t LEFT JOIN yearly_item y ON t.itemid=y.itemid AND t.catid=y.catid WHERE t.catid=1 AND y.year='2016' AND y.itemid IS NULL
it is giving this result:
MySQL returned an empty result set (i.e. zero rows).
Try
select b.itemid, b.itemname, b.catid, a.year
from yearly_item a, item b
where year = 2016
and b.itemid != a.itemid
and b.catid = 1
and a.catid = 1
http://sqlfiddle.com/#!9/cfd66/14/0
I have a table called lottery_winners with the following useful colums:
+----+------+------+--------+---------+
| id | plid | zbid | amount | numbers |
+----+------+------+--------+---------+
id is the unique, primary id for the table. plid refers to the past_lotteries table (i.e I can get all the lottery winners from a specific lottery in the past this way. zbid is the id of the member/user (the winner). amount is the sum of money they won in the lottery, and finally numbers is a VARCHAR CSV field with their lottery numbers.
Here's an example of what rows could be in the table:
+----+------+------+--------+---------+
| id | plid | zbid | amount | numbers |
+----+------+------+--------+---------+
| 1 | 1 | 2 | 1 | 1,2,3 |
+----+------+------+--------+---------+
| 2 | 1 | 4 | 5 | 4,5,6 |
+----+------+------+--------+---------+
| 3 | 1 | 3 | 7 | 3,4,5 |
+----+------+------+--------+---------+
| 4 | 1 | 2 | 3 | 7,8,9 |
+----+------+------+--------+---------+
| 5 | 2 | 2 | 8 | 8,9,10 |
+----+------+------+--------+---------+
Now, I want to run a SELECT statement which will bring back all the rows but in a really specific order. The rows should be in grouped by zbid as such (in this case I have added a WHERE plid=1 clause):
+----+------+------+--------+---------+
| id | plid | zbid | amount | numbers |
+----+------+------+--------+---------+
| 1 | 1 | 2 | 1 | 1,2,3 |
+----+------+------+--------+---------+
| 4 | 1 | 2 | 3 | 7,8,9 |
+----+------+------+--------+---------+
| 2 | 1 | 4 | 5 | 4,5,6 |
+----+------+------+--------+---------+
| 3 | 1 | 3 | 7 | 3,4,5 |
+----+------+------+--------+---------+
Next criteria is that not only should they be grouped by zbid, but within this grouping they should be ordered by amount DESC. This is what it would now look like:
+----+------+------+--------+---------+
| id | plid | zbid | amount | numbers |
+----+------+------+--------+---------+
| 4 | 1 | 2 | 3 | 7,8,9 |
+----+------+------+--------+---------+
| 1 | 1 | 2 | 1 | 1,2,3 |
+----+------+------+--------+---------+
| 2 | 1 | 4 | 5 | 4,5,6 |
+----+------+------+--------+---------+
| 3 | 1 | 3 | 7 | 3,4,5 |
+----+------+------+--------+---------+
The top two rows have swapped around.
One more criteria. As you can see, although they are grouped by zbid, there's no specific order to them. I want it to group by zbid, but the order should be based on sum(amount) for each group.
The following table shows the totals for each zbid in no specific order (taking into account that plid=1:
+------+-------------+
| zbid | sum(amount) |
+------+-------------+
| 2 | 4 |
+------+-------------+
| 3 | 7 |
+------+-------------+
| 4 | 5 |
+------+-------------+
So using this information the final result using the SELECT statement should be the following (with an added sum(amount) column):
+----+------+------+--------+---------+-------------+
| id | plid | zbid | amount | numbers | sum(amount) |
+----+------+------+--------+---------+-------------+
| 3 | 1 | 3 | 7 | 3,4,5 | 7 |
+----+------+------+--------+---------+-------------+
| 2 | 1 | 4 | 5 | 4,5,6 | 5 |
+----+------+------+--------+---------+-------------+
| 4 | 1 | 2 | 3 | 7,8,9 | 4 |
+----+------+------+--------+---------+-------------+
| 1 | 1 | 2 | 1 | 1,2,3 | 4 |
+----+------+------+--------+---------+-------------+
That's it! Now I've tried a couple of things myself, but I'm not exactly sure how to get the full final result. I have tried:
SELECT id,plid,zbid,amount,numbers,sum(amount) FROM lottery_winners GROUP BY zbid ORDER BY sum(amount) DESC
Now that seemed to meet the final criterion, but it didn't give me individual results for the table.
Please also note that as these results will be paginated, I will need to be adding LIMIT $start,$perpage to the end of the query.
have this a try:
SELECT a.id,
a.plid,
a.zbid,
a.amount,
a.numbers,
c.totalAmount
FROM lottery_winners a
INNER JOIN (
SELECT b.zbid,
SUM(b.amount) totalAmount
FROM lottery_winner b
WHERE b.plid = 1
GROUP BY b.zbid
) c
ON a.zbid = c.zbid
WHERE a.plid = 1
ORDER BY c.totalAmount desc
I have two tables, rating:
+-----------+-----------+-------------+----------+
| rating_id | entity_id | rating_code | position |
+-----------+-----------+-------------+----------+
| 1 | 1 | Quality | 0 |
| 2 | 1 | Value | 0 |
| 3 | 1 | Price | 0 |
+-----------+-----------+-------------+----------+
And rating_option
+-----------+-----------+------+-------+----------+
| option_id | rating_id | code | value | position |
+-----------+-----------+------+-------+----------+
| 1 | 1 | 1 | 1 | 1 |
| 2 | 1 | 2 | 2 | 2 |
| 3 | 1 | 3 | 3 | 3 |
| 4 | 1 | 4 | 4 | 4 |
| 5 | 1 | 5 | 5 | 5 |
| 6 | 2 | 1 | 1 | 1 |
| 7 | 2 | 2 | 2 | 2 |
| 8 | 2 | 3 | 3 | 3 |
| 9 | 2 | 4 | 4 | 4 |
| 10 | 2 | 5 | 5 | 5 |
| 11 | 3 | 1 | 1 | 1 |
| 12 | 3 | 2 | 2 | 2 |
| 13 | 3 | 3 | 3 | 3 |
| 14 | 3 | 4 | 4 | 4 |
| 15 | 3 | 5 | 5 | 5 |
+-----------+-----------+------+-------+----------+
I need a SQL query (not application level, must stay in the database) which will select a set of ratings randomly. A sample result would look like this, but would pick a random value for each rating_id on subsequent calls:
+-----------+-----------+------+-------+----------+
| option_id | rating_id | code | value | position |
+-----------+-----------+------+-------+----------+
| 1 | 1 | 1 | 1 | 1 |
| 8 | 2 | 3 | 3 | 3 |
| 15 | 3 | 5 | 5 | 5 |
+-----------+-----------+------+-------+----------+
I'm totally stuck on the random part, and grouping by rating_id has been a crap shoot so far. Any MySQL ninjas want to take a stab?
Thanks,
Joe
EDIT: I've tried rand() in a bunch of combinations, and I'm sure that it will be necessary to create the randomness of the result, but I cannot figure out how to return one random row for each of the rows in rating. I cannot use order by rand() limit 1 because I need three rows, and order by rand() limit 3 won't give me one of each rating_id, which is the ultimate goal. I need a combination of rand() and either subqueries or joins so that I can ensure one of each rating_id.
Alright, a little messy, but seems to do the job. Someone may know what they're doing better than I do that can clean this up:
SELECT random.rating_id, random.rand_option_id, r3.code, r3.value, r3.position
FROM
(SELECT r.rating_id,
(SELECT r2.option_id
FROM rating_option r2
WHERE r2.rating_id = r.rating_id
ORDER BY RAND() LIMIT 1) AS 'rand_option_id'
FROM rating_option r
GROUP BY r.rating_id
) random
LEFT JOIN rating_option AS r3 ON r3.option_id = rand_option_id
Results (varies every time, of course):
+-----------+----------------+------+-------+----------+
| rating_id | rand_option_id | code | value | position |
+-----------+----------------+------+-------+----------+
| 1 | 4 | 4 | 4 | 4 |
| 2 | 6 | 1 | 1 | 1 |
| 3 | 13 | 3 | 3 | 3 |
+-----------+----------------+------+-------+----------+
You could use the rand() function to do sorting in a select on the rating table.
For example:
select rating_id from rating order by rand() limit 1
As clarified in your comments, and the other posts above
select * from rating_option order by rand()
will return all records in a random order... However, if you want only X number, then inclue that as the limit as noted by others
select * from rating_option order by rand() limit 5 (or whatever number)
Have you looked into the rand() function?
SELECT column FROM table
ORDER BY RAND()
LIMIT 1
http://www.petefreitag.com/item/466.cfm
http://dev.mysql.com/doc/refman/5.0/en/mathematical-functions.html#function_rand
Sample code
select *
from rating_option
group by rating_id
order by rand()