I have the following tables:
Drivers table, with a Driver_Code column
Route_files table, with a Driver_Code column and a Route_Code column
Routes table, with a Route_Code column and a Kilometers column
For every entry in the Drivers table there may be more than 1 entry in the Route_files table with the same Driver_Code. For every entry in the Route_files table, there is only one entry in the Routes table with the same Route_Code.
What I am trying to do is order the Drivers based on the total number of kilometers that they drove. So if I have the following data:
Drivers:
Driver_Code
2
3
4
Route_files:
Driver_Code Route_Code
2 20
2 50
2 30
3 30
4 40
Routes:
Route_Code Kilometers
20 1231
30 9
40 400000
50 24234
Then Driver 2 drove routes 20 30 and 50 so the total kilometers is 25474. Similarly driver 3 drove 9km and driver 4 drove 400000. The SQL query that I need should output:
Driver_Code Total_km
4 400000
2 25474
3 9
I tried to use an inner join on the Route_files and Routes tables to obtain a single "table" with all the necessary information, hoping that I could further use this obtained table, but couldn't figure out how to do that. I am working in dBase 2019(and can't change to something better, unfortunately). Any hints and ideas are appreciated!
I finally managed to do it. This is the working query:
select
Driver_Code,
SUM(km) as Total_km
from
Route_files
inner join Routes on Route_files.Route_Code = Routes.Route_Codes
GROUP BY
Route_files.Driver_Code
ORDER BY
Total_km Descending
Initially I was doing select Driver_Code, km, SUM(km) and when trying to do GROUP BY, dBase was forcing me to group by Driver_Code as well as km, which meant that the SUM function was being applied to every single entry instead of on all the entries of a single Driver_Code, which is what I needed. Now I finally understand what GROUP BY does!
Thanks everyone for your comments!
Related
I have a table company_totals, that has the following schema -
column_name
column_data_type
company
STRING
link
STRING
full_count
FLOAT
starts_with_count
FLOAT
Number of rows = 12,000,000. Table size = 1.6 GB. CLUSTERED BY = company link. SEARCH INDEX created on column = link.
I have the following select statement which is taking beyond 6 hours and the execution results in timeout - Operation timed out after 6.0 hours. Consider reducing the amount of work performed by your operation so that it can complete within this limit.)
SELECT first_table.company, first_table.link, null as full_count, SUM(second_table.full_count) AS starts_with_count
FROM company_totals first_table, company_totals second_table
WHERE STARTS_WITH(second_table.link, first_table.link)
group by first_table.company, first_table.link
The above query calculates values of the column starts_with_count which is the sum of values of another column full_count, based on a starts_with() condition. In the company_totals table, the column starts_with_count is what I want to fill. I have added the expected values for this column manually to show my expectation. Other column values are already present in the table. The starts_with_count value is sum (full_count) where its link appears in other rows.
company
link
full_count
starts_with_count (expected)
abc
http://www.abc.net1
1
15 (= sum (full_count) where link like 'http://www.abc.net1%')
abc
http://www.abc.net1/page1
2
9 (= sum (full_count) where link like 'http://www.abc.net1/page1%')
abc
http://www.abc.net1/page1/folder1
3
3 (= sum (full_count) where link like 'http://www.abc.net1/page1/folder1%')
abc
http://www.abc.net1/page1/folder2
4
4
abc
http://www.abc.net1/page2
5
5
xyz
http://www.xyz.net1/
6
21
xyz
http://www.xyz.net1/page1/
7
15
xyz
http://www.xyz.net1/page1/file1
8
8
Highly appreciate any help in this issue.
I have two tables Medication and Inventory. I'm trying to SELECT all the below details from both tables but there are multiple listings of medication ids with different BRANCH_NO also in the INVENTORY table (the primary key in INVENTORY is actually BRANCH_NO, MEDICATION_ID composite key)
I need to total up the various medication_IDs and also join the tables in one SELECT command and display all the infomation for each med (there are 5) with a total sum of each med at the end of each row. But im getting all muddled trying Group by and Sum and at one point partition. Help please I'm new to this.
Below is the latest non working version - but it doesn't display
Medication Name
Medication Desc
Manufacturer
Pack Size
like i chanced it might.
SELECT I.MEDICATION_ID,
SUM(I.STOCK_LEVEL)
FROM INVENTORY I
INNER JOIN (SELECT MEDICATION_NAME, SUBSTR(MEDICATION_DESC,1,20) "Medication Description",
MANUFACTURER, PACK_SIZE FROM MEDICATION) M ON MEDICATION_ID=I.MEDICATION_ID
GROUP BY I.MEDICATION_ID;
For the data imagine I want this sort of output:
MEDICATION_ID MEDICATION_NAME STOCK_LEVEL OtherColumns.....
1 Alpha 10
2 Bravo 20
3 Charlie 20
1 Alpha 30
4 Delta 10
5 Echo 20
5 Echo 40
2 Bravo 10
grouping and totalling into this:
MEDICATION_ID MEDICATION_NAME STOCK_LEVEL OtherColumns.....
1 Alpha 40
2 Bravo 30
3 Charlie 20
4 Delta 10
5 Echo 60
I can get this when its just one table but when Im trying to join tables and also SELECT things its just not working.
Thanks in advance guys. I appreciate it may be a simple solution, but it will be a big help.
You need to write explicitly all non-aggregated columns into both SELECT and GROUP BY lists ( Btw, no need to use a nested query, and if it's the case MEDICATION_ID column is missing in it ) :
SELECT I.MEDICATION_ID, M.MEDICATION_NAME, SUM(I.STOCK_LEVEL) AS STOCK_LEVEL,
SUBSTR(M.MEDICATION_DESC,1,20) "Medication Description", M.MANUFACTURER, M.PACK_SIZE
FROM INVENTORY I
JOIN MEDICATION M ON M.MEDICATION_ID = I.MEDICATION_ID
GROUP BY I.MEDICATION_ID, M.MEDICATION_NAME, SUBSTR(M.MEDICATION_DESC,1,20),
M.MANUFACTURER, M.PACK_SIZE;
This way, you'll be able to return all the listed columns.
I've changed my DB structure to make it more future proof. Now I'm having trouble with the new select query.
I have table called activities that has a list of activities and how many steps per minute that activity was worth. The table was structred like this:
Activities
id act_name act_steps
12 Boxing 250
14 Karate 300
17 Yoga 89
I have another table called distance that is structed like this:
Distance
id dist_activity_id dist_activity_duration member_id
1 12 60 12
2 14 90 12
3 17 30 12
I have the query that would SUM and produce a total for all activities in the distance table
SELECT ROUND(SUM(act_steps * dist_activity_duration / 2000),2) AS total_miles
FROM distance,
activities
WHERE activities.id = distance.dist_activity_id
This worked fine.
To future proof it incase the number of steps for an activity changes I've setup a table called steps that is structured like this:
Steps
id activity_steps
1 6
2 250
3 300
4 89
I then updated the activities table, removing the act_steps column and replacing it with steps_id so it now looks like this:
Updated activities
id act_name steps_id
12 Boxing 2
14 Karate 3
17 Yoga 4
I'm not sure how to create the select command to get the SUM using the new structure.
Could someone please help me with this?
Thanks
Wayne
Learn to use proper JOIN syntax! Your query should look like:
SELECT ROUND(SUM(a.act_steps * d.dist_activity_duration / 2000), 2) AS total_miles
FROM distance d JOIN
activities a
ON a.id = d.dist_activity_id;
If you need to lookup the steps, then add another JOIN:
SELECT ROUND(SUM(s.activity_steps * d.dist_activity_duration / 2000), 2) AS total_miles
FROM distance d JOIN
activities a
ON a.id = d.dist_activity_id JOIN
steps s
ON s.id = a.steps_id;
I have a query that collects many different columns, and I want to include a column that sums the price of every component in an order. Right now, I already have a column that simply shows the price of every component of an order, but I am not sure how to create this new column.
I would think that the code would go something like this, but I am not really clear on what an aggregate function is or why I get an error regarding the aggregate function when I try to run this code.
SELECT ID, Location, Price, (SUM(PriceDescription) FROM table GROUP BY ID WHERE PriceDescription LIKE 'Cost.%' AS Summary)
FROM table
When I say each component, I mean that every ID I have has many different items that make up the general price. I only want to find out how much money I spend on my supplies that I need for my pressure washers which is why I said `Where PriceDescription LIKE 'Cost.%'
To further explain, I have receipts of every customer I've worked with and in these receipts I write down my cost for the soap that I use and the tools for the pressure washer that I rent. I label all of these with 'Cost.' so it looks like (Cost.Water), (Cost.Soap), (Cost.Gas), (Cost.Tools) and I would like it so for Order 1 it there's a column that sums all the Cost._ prices for the order and for Order 2 it sums all the Cost._ prices for that order. I should also mention that each Order does not have the same number of Costs (sometimes when I use my power washer I might not have to buy gas and occasionally soap).
I hope this makes sense, if not please let me know how I can explain further.
`ID Location Price PriceDescription
1 Park 10 Cost.Water
1 Park 8 Cost.Gas
1 Park 11 Cost.Soap
2 Tom 20 Cost.Water
2 Tom 6 Cost.Soap
3 Matt 15 Cost.Tools
3 Matt 15 Cost.Gas
3 Matt 21 Cost.Tools
4 College 32 Cost.Gas
4 College 22 Cost.Water
4 College 11 Cost.Tools`
I would like for my query to create a column like such
`ID Location Price Summary
1 Park 10 29
1 Park 8
1 Park 11
2 Tom 20 26
2 Tom 6
3 Matt 15 51
3 Matt 15
3 Matt 21
4 College 32 65
4 College 22
4 College 11 `
But if the 'Summary' was printed on every line instead of just at the top one, that would be okay too.
You just require sum(Price) over(Partition by Location) will give total sum as below:
SELECT ID, Location, Price, SUM(Price) over(Partition by Location) AS Summed_Price
FROM yourtable
WHERE PriceDescription LIKE 'Cost.%'
First, if your Price column really contains values that match 'Cost.%', then you can not apply SUM() over it. SUM() expects a number (e.g. INT, FLOAT, REAL or DECIMAL). If it is text then you need to explicitly convert it to a number by adding a CAST or CONVERT clause inside the SUM() call.
Second, your query syntax is wrong: you need GROUP BY, and the SELECT fields are not specified correctly. And you want to SUM() the Price field, not the PriceDescription field (which you can't even sum as I explained)
Assuming that Price is numeric (see my first remark), then this is how it can be done:
SELECT ID
, Location
, Price
, (SELECT SUM(Price)
FROM table
WHERE ID = T1.ID AND Location = T1.Location
) AS Summed_Price
FROM table AS T1
to get exact result like posted in question
Select
T.ID,
T.Location,
T.Price,
CASE WHEN (R) = 1 then RN ELSE NULL END Summary
from (
select
ID,
Location,
Price ,
SUM(Price)OVER(PARTITION BY Location)RN,
ROW_number()OVER(PARTITION BY Location ORDER BY ID )R
from Table
)T
order by T.ID
I hope that someone can help me with my issue. I need to create in a single SELECT statement (the system that we use has some pivot tables in Excel that handle one single SELECT) the following:
I have a INL (Invoice Lines) table, that has a lot of fields, but the important one is the date.
INL_ID DATE
19 2004-03-15 00:00:00.000
20 2004-03-15 00:00:00.000
21 2004-03-15 00:00:00.000
22 2004-03-16 00:00:00.000
23 2004-03-16 00:00:00.000
24 2004-03-16 00:00:00.000
Now, I also have a ILD (Invoice Line Details) that are related by an ID field to the INL table. From the second table I will need to use the scu_qty field to "repeat" values from the first one in my results sheet.
The ILD table values that we need are:
INL_ID scu_qty
19 1
20 1
21 1
22 4
23 4
Now, with the scu_qty I need to repeat the value of the first table and also add one day each record, the scu_qty is the quantity of days of the services that we sell in the ILD table.
So I need to get something like (i'm going to show the INL_ID 22 that you can see has a value different of 1 in the SCU_QTY). The results of the select has to give me something like:
INL_ID DATE
22 2004-03-15 0:00:00
22 2004-03-16 0:00:00
22 2004-03-17 0:00:00
22 2004-03-18 0:00:00
In this information I only wrote the fields that need to be repeated and calculated, of course I will need more fields, but will be repeated from the INL table, so I don't put them so you don't get confused.
I hope that someone can help me with this, it's very important for us this report. Thanks a lot in advance
(Sorry for my English, that isn't my first language)
SELECT INL_ID, scu_qty, CalculatedDATE ...
FROM INL
INNER JOIN ILD ON ...
INNER JOIN SequenceTable ON SequenceTable.seqNo <= ILD.scu_qty
ORDER BY INL_ID, SequenceTable.seqNo
Depending on your SQL flavour you will need to lookup date manipulation functions to do
CalculatedDATE = {INL.DATE + SequenceTable.seqNo (days)}
select INL.INL_ID, `DATE`
from
INL
inner join
ILD on INL.INL_ID = ILD.INL_ID
inner join (
select 1 as qty union select 2 union select 3 union select 4
) s on s.qty <= ILD.scu_qty
order by INL.INL_ID
In instead of that subselect you will need a table if quantity is a bit bigger. Or tell what is your RDBMS and there can be an easier way.