Suppose I have following table (MYTable)
ID joindate AnyText deptid
1 2013/10/10 ABC 10
2 2013/10/11 XYZ 20
3 2013/10/10 PQR 10
4 2013/10/14 MNO 30
5 2013/10/11 UVW 20
Now I want result like this:
ID joindate deptid count(*)
1 2013/09/21 10 2
2 2013/09/22 20 2
4 2013/09/24 30
I am using mysql. my table have thousands of record . when i am applying group by it is taking 6-7 second how can i optimize it..
select id,latestdate,deptid,count(*) from MyTable
where joindate>=now()-interval 30 day group by deptid
Related
I have Data
id Date CatId itemid itemname price
1 10/5/2019 1 1 ABC 20
2 10/5/2019 1 2 XYZ 30
3 10/5/2019 2 1 ABC 20
4 10/5/2019 3 1 ABC 20
5 11/5/2019 1 2 XYZ 30
6 11/5/2019 2 1 ABC 20
7 11/5/2019 2 3 PQR 40
8 12/5/2019 3 1 ABC 20
9 12/5/2019 3 2 XYZ 30
10 12/5/2019 1 2 XYZ 30
11 12/5/2019 2 1 ABC 20
expected result data
date CatId toal
10/5/2019 1 50
10/5/2019 2 20
10/5/2019 3 20
11/5/2019 1 30
11/5/2019 2 60
12/5/2019 1 30
12/5/2019 2 20
12/5/2019 3 50
I want result order by date and after sum of price group by catid,
I have tried multiple query applied but get exact solution. I have spent so much time.
I have tried bellow queries
SELECT * FROM (SELECT * FROM `table` ORDER BY `date` DESC) as tbl
GROUP BY tbl.`catid`
SELECT *
FROM `table`
GROUP BY `date` ORDER BY `date` DESC
SELECT *
FROM (
SELECT * FROM `table`
ORDER BY `date` DESC
) AS sub
GROUP BY `catid` ORDER BY `date` DESC
the columns you can use in order by and group by can be different
You could use group by and sum directly
select date, catid, sum(price)
from my_table
group by date, catid
order by date, sum(price), catid
I'm looking for some basic direction on how where to start looking to try and rank rows of a common key in a query.
Imagine I have a table like this:
user_id | account_id | score
1 A 10
1 B 20
2 C 10
2 D 20
2 E 30
What I'm hoping to do is add a rank column for relative to each user_id where the highest score gets the top rank:
user_id | account_id | score | rank
1 A 10 2
1 B 20 1
2 C 10 3
2 D 20 2
2 E 30 1
Just looking for some basic direction in terms of which way to head :/
You can use subquery
select
*,
(select count(1)+1 from your_table b where a.user_id=b.user_id and a.score<b.score) as rank
from your_table a
Output
1 A 10 2
1 B 20 1
2 C 10 3
2 D 20 2
2 E 30 1
I have a table like this
id productName amount
1 Abc 10
2 xyz 20
3 Abc 10
4 Abc 10
5 Abc 10
6 Abc 10
7 xyz 20
8 xyz 20
9 xyz 20
10 xyz 20
I want to sum Amount and Count No. of rows for each products in mysql. Output like below
productName noQty totalAmount
ABC 5 50
xyz 5 100
select product_name,sum(amount)as totalamount,count(productName)as noQty
from table_name
group by productname
by using count you can get COUNT from your table and using SUM you can get sum of all same product name.
SELECT productName,
count(productName) AS noQty,
SUM(amount) AS totalAmount
FROM tableName
GROUP BY productName
select productname,count(productname) as qty,sum(amount)
from table_name
group by productname
I'm learning HIVE these days and meet some problems...
I have a table called SAMPLE:
USER_ID PRODUCT_ID NUMBER
1 3 20
1 4 30
1 2 25
1 6 50
1 5 40
2 1 10
2 3 15
2 2 40
2 5 30
2 3 35
How can I use HIVE to group table by user_id and in each group order the records by DESC order of NUMBER and in each group I want to keep up to 3 records.
The result I want to have is like:
USER_ID PRODUCT_ID NUMBER(optional column)
1 6 50
1 5 40
1 4 30
2 2 40
2 3 35
2 5 30
or
USER_ID PRODUCT_IDs
1 [6,5,4]
2 [2,3,5]
Could someone help me ?..
Thanks very much!!!!!!!!!!!!!!!!
try this,
select user_id,product_id,number
from(
select user_id,product_id,number, ROW_NUMBER() over (Partition BY user_id) as RNUM
from (
select user_id, number,product_id
from SAMPLE
order by number desc
) t) t2
where RNUM <=3
output
1 6 50
1 5 40
1 4 30
2 2 40
2 3 35
2 5 30
hive version should be 0.11 or greater, may I know if your version is lower
I have 4 major tables in my database.
Season --> seasonID
Trials --> trialID
Competition --> CID,name
Camps --> campID,DivisionID(FK)
Divisions ---> DivisionID
Contestants --->ContestantID
Now a contestant belongs to / are members of a divisions.
Then a division belongs to a camp.
All this leads to my Performance table.
PERFORMANCE TABLE
SeasonID|TrialID|CampID|DivID|CompetionID|CtestantID|Score1 |Score2 |Total
1 1 1 1 1 1 20 20 40
1 1 1 1 2 1 20 15 30
1 2 1 1 1 2 10 5 15
1 2 1 1 2 2 5 5 10
1 2 1 1 1 1 10 30 40
1 2 1 1 2 1 20 10 30
How can I query this performance table to give me the competition name, total score and rank (ranking over total score) of each contestant in each competition by trials and by seasons?
Example:
In season 1 and trial 2 I want to have:
SeasonID| TrialID | ContestantID| Competition | TotalScore | Rank
1 2 1 1 40 1
1 2 2 1 15 2
1 2 1 2 30 1
1 2 2 2 10 2
How do I go about this? I have tried table variables, pivot and joins but I can only rank by competitions, but I don't how to aggregate the results to get the result above!
I'm not exactly sure how you calculated your desired results. I think this is what you are after but, if so, the TotalScore in the desired results of your question should be 10 for the last record, not 20.
SELECT SeasonID, TrialID, ContestantID, CompetitionID, Total,
DENSE_RANK() OVER(PARTITION BY CompetitionId ORDER BY Total DESC) AS [Rank]
FROM PerformanceTable