I'm using DBISAM to have a table from existing datas.
My problem is :
NAME | COUNT(QTY) | PRICE | ? |
_______|________________|____________|_________|
A | 1 | 9.5 | 9.5 |
_______|________________|____________|_________|
B | 2 | 12.5 | 25 |
_______|________________|____________|_________|
C | 5 | 20 | 100 |
_______|________________|____________|_________|
My SQL request is SELECT NAME, COUNT(QTY), PRICE FROM ARTICLE.
But I can't find how to have the last column (with the ?).
I tried PRICE * COUNT(QTY) but DBISAM can't handle this and say "Invalid use of non-aggregated column".
Have you an idea about how I can get the last column ?
Thanks
Related
I want to use post and pre revenue of an interaction to calculate net revenue. Sometimes there are multiple customers in an interaction. The data is like:
InteractionID | Customer ID | Pre | Post
--------------+-------------+--------+--------
1 | ab12 | 10 | 30
2 | cd12 | 40 | 15
3 | de12;gh12 | 15;30 | 20;10
Expected output is to take sum in pre and post call to calculate net
InteractionID | Customer ID | Pre | Post | Net
--------------+---------------+--------+-------+------
1 | ab12 | 10 | 30 | 20
2 | cd12 | 40 | 15 | -25
3 | de12;gh12 | 45 | 30 | -15
How do I get the net revenue column?
The proper solution is to normalize your relational design by adding a separate table for customers and their respective pre and post.
While stuck with the current design, this would do it:
SELECT *, post - pre AS net
FROM (
SELECT interaction_id, customer_id
,(SELECT sum(x::numeric) FROM string_to_table(pre, ';') x) AS pre
,(SELECT sum(x::numeric) FROM string_to_table(post, ';') x) AS post
FROM tbl
) sub;
db<>fiddle here
string_to_table() requires at least Postgres 14.
You did not declare your Postgres version, so I assume the current version Postgres 14.
For older versions replace with regexp_split_to_table() or unnest(string_to array)).
I am tring to get an user number per table and per month.
I am trying to get read access (select and no update delete)
Do you know if it is possible to get this with view like dbc.tables ?
Database | Table | Date (YYYYMM) | Number of access | Number of distinct access
------------|-----------|-------------------|----------------------------------------------
PROD | SALES | 202004 | 500 | 300
PROD | SALES | 202003 | 550 | 330
DEV | SALES | 202004 | 15 | 10
P.S : English isn't my native langage => sorry
"Accesscount" column in dbc.tables will give you the number of times a particular object has been accessed.
I have data on approx 1000 individuals, where each individual can have multiple rows, with multiple dates and where the columns indicate the program admitted to and a code number.
I need each row to contain a distinct date, so I need to delete the rows of duplicate dates from my table. Where there are multiple rows with the same date, I need to keep the row that has the lowest code number. In the case of more than one row having both the same date and the same lowest code, then I need to keep the row that also has been in program (prog) B. For example;
| ID | DATE | CODE | PROG|
--------------------------------
| 1 | 1996-08-16 | 24 | A |
| 1 | 1997-06-02 | 123 | A |
| 1 | 1997-06-02 | 123 | B |
| 1 | 1997-06-02 | 211 | B |
| 1 | 1997-08-19 | 67 | A |
| 1 | 1997-08-19 | 23 | A |
So my desired output would look like this;
| ID | DATE | CODE | PROG|
--------------------------------
| 1 | 1996-08-16 | 24 | A |
| 1 | 1997-06-02 | 123 | B |
| 1 | 1997-08-19 | 23 | A |
I'm struggling to come up with a solution to this, so any help greatly appreciated!
Microsoft SQL Server 2012 (X64)
The following works with your test data
SELECT ID, date, MIN(code), MAX(prog) FROM table
GROUP BY date
You can then use the results of this query to create a new table or populate a new table. Or to delete all records not returned by this query.
SQLFiddle http://sqlfiddle.com/#!9/0ebb5/5
You can use min() function: (See the details here)
select ID, DATE, min(CODE), max(PROG)
from table
group by DATE
I assume that your table has a valid primary key. However i would recommend you to take IDas Primary key. Hope this would help you.
I have a table in postgres like below,
alg_campaignid | alg_score | cp | sum
----------------+-----------+---------+----------
9829 | 30.44056 | 12.4000 | 12.4000
9880 | 29.59280 | 12.0600 | 24.4600
9882 | 29.59280 | 12.0600 | 36.5200
9827 | 29.27504 | 11.9300 | 48.4500
9821 | 29.14840 | 11.8800 | 60.3300
9881 | 29.14840 | 11.8800 | 72.2100
9883 | 29.14840 | 11.8800 | 84.0900
10026 | 28.79280 | 11.7300 | 95.8200
10680 | 10.31504 | 4.1800 | 100.0000
From which i have to select a record based on randomly generated number from 0 to 100.i.e first record should be returned if random number picked is between 0 and 12.4000,second if rendom is between 12.4000 and 24.4600,and likewise last if random no is between 95.8200 and 100.0000.
For Example
if the random number picked is 8 then the first record should be returned
or
if the random number picked is 48 then the fourth record should be returned
Is it possible to do this postgres if so kindly recommend a solution for this..
Yes, you can do this in Postgres. If you want to generate the number in the database:
with r as (
select random() * 100 as r
)
select t.*
from table t cross join r
where t.sum <= r.r
order by t.sum desc
limit 1;
is it possible to have a sum in detail band in iReport?
It is important to have cells merged vertically after export to excel like this:
-----------------------------
| id | year | value | sum |
-----------------------------
| | 2010 | 55 | |
| 1 | 2011 | 65 | 180 |
| | 2012 | 60 | |
-----------------------------
| 2 | 2010 | 70 | 70 |
-----------------------------
My idea is to have the main query with GROUP BY clause and for "year" and "value" use table component with another query. Problem is that my query is long running and i need to have only one in whole report.
First have a look at here. It's about grouping rows.
You will see that you should create a group in your report, not in the query depending on your id field.
For calculating the sum field, drag the value field to the column footer, and then you will see a pop-up menu. Click to the result of an aggregation function radio button, then choose sum function. This will create a variable to calculate the sum of the value field. Change this variable's reset type to group (to id_group). Use this field in your sum field.
For grouping rows depending on id, click on the sum field and set this field's print when group changes to id_group.
this should help :)
when you group your fields your table will look like this. The grouped fields are at the top.
-----------------------------
| id | year | value | sum |
-----------------------------
| 1 | 2010 | 55 | 180 |
| | 2011 | 65 | |
| | 2012 | 60 | |
-----------------------------
| 2 | 2010 | 70 | 70 |
-----------------------------