I have table where number of errors made by an employee is stored.
i_empid error_category error_count date
13 1 1 1-feb-2017
13 2 1 1-feb-2017
13 2 2 3-feb-2017
341 1 1 3-feb-2017
I want result set to group by error category for particular date
error_category error_count 1-feb-2017 2-feb-2017 3-feb-2017
1 2 1 0 1
2 0 1 0 2
How can I achieve this?
I am not sure what database you use, is it MySQL?
I think youre trying to do something like this:
select t.error_category, t.error_count, sum(IF(t.date='1-feb-2017',1,0)) as `1-feb-2017`,
sum(IF(t.date='3-feb-2017',1,0)) as `3-feb-2017`
from <yourTable> t
group by t.error_category
There are different ways to archieve this actually
Related
I have a table below
days
balance
user_id
wanted column
2022/08/01
10
1
1
2022/08/02
11
1
1
2022/08/03
10
1
1
2022/08/03
0
2
1
2022/08/05
3
2
2
2022/08/06
3
2
2
2022/08/07
3
3
3
2022/08/08
0
2
3
since I'm new to SQL couldn't aggregate over window by clauses, correctly.
which means; I want to find unique users that have balance>0 per day.
thanks
update:
exact output wanted:
days
unque users
2022/08/01
1
2022/08/02
1
2022/08/03
1
2022/08/05
2
2022/08/06
2
2022/08/07
3
2022/08/08
3
update: how if I want to accumulate the number of unique users over time? with consideration of new users [means: counting users who didn't exist before], and the balance > 0
everyones help is appreaciated deeply :)
SELECT
*,
COUNT(DISTINCT CASE WHEN balance > 0 THEN USER_ID END) OVER (ORDER BY days)
FROM
your_table
View of a table
ID
kWh
1
3
1
10
1
8
1
11
2
12
2
4
2
7
2
8
3
3
3
4
3
5
I want to recive
ID
kWh
1
32
2
31
3
12
The table itself is more complex and larger. But the point is this. How can this be done? And I can't know in advance the ID numbers of the first column.
SELECT T.ID,SUM(T.KWH)SUM_KWH
FROM YOUR_TABLE T
GROUP BY T.ID
Do you need this one?
Let's assume your database name is 'testdb' and table name is 'table1'.
SELECT * FROM testdb.table1;
SELECT id, SUM(kwh) AS "kwh2"
FROM stack.table1
WHERE id = 1
keep running the query will all (ids). you will get output.
By following this query you will get desired output.
Hope this helps.
I currently have a table in SQL that looks like this
PRODUCT_ID_1 PRODUCT_ID_2 SCORE
1 2 10
1 3 100
1 10 3000
2 10 10
3 35 100
3 2 1001
That is, PRODUCT_ID_1,PRODUCT_ID_2 is a primary key for this table.
What I would like to do is use this table to add in a row to tell whether or not the current row is the one that maximizes SCORE for a value of PRODUCT_ID_1.
In other words, what I would like to get is the following table:
PRODUCT_ID_1 PRODUCT_ID_2 SCORE IS_MAX_SCORE_FOR_ID_1
1 2 10 0
1 3 100 0
1 10 3000 1
2 10 10 1
3 35 100 0
3 2 1001 1
I am wondering how I can compute the IS_MAX_SCORE_FOR_ID_1 column and insert it into the table without having to create a new table.
You can try like this...
Select PRODUCT_ID_1, PRODUCT_ID_2 ,SCORE,
(Case when b.Score=
(Select Max(a.Score) from TableName a where a.PRODUCT_ID_1=b. PRODUCT_ID_1)
then 1 else 0 End) as IS_MAX_SCORE_FOR_ID_1
from TableName b
You can use a window function for this:
select product_id_1,
product_id_2,
score,
case
when score = max(score) over (partition by product_id_1) then 1
else 0
end as is_max_score_for_id_1
from the_table
order by product_id_1;
(The above is ANSI SQL and should run on any modern DBMS)
I have one table like below format:
ID Date Frequency
1 01/06/2009 1
2 01/06/2009 1
3 01/06/2009 2
4 01/06/2009 1 *
5 01/06/2009 1
6 01/06/2009 2 *
I want result set like below:
Current : 6 01/06/2009 2
Previous : 4 01/06/2009 1
I am using SQL Server 2000 databse.Please provide solution for above resultset.
This is a pretty basic SQL statement
SELECT count(ID), date, Frequency
FROM yourTable
Group By Date, Frequency
ORDER BY Frequency DESC
But I'm not positve due to * and the current: Previous: statements
I have been trying to devise an SQL query in Access 2010 to count the number of sequential field values which are based over 3 tables using fields with unique ID's
Example
Table1: Course
CorID Date
1 01/01/2012
2 01/03/2012
3 01/02/2012
Table 2: Delegate
DelID StaffID CorID Value CounterField
1 17263 2 99 1
2 17263 1 99 2
3 17263 3 99 3
4 17263 65 4 1
5 17263 44 5 1
6 17263 78 5 2
Table 3: Staff
StaffID Surname
1 Test
2 Smith
17263 Jones
The CounterField increases by 1 where the Value field in Table 2 is the same as the previous Value field. There would be a requirement to ensure that the count only uses the the order based on the course table Date field. The delegate table would also contain more DelID fields than listed and will contain different StaffID values as well.
The CounterField in the above table is an example of what I want the query to be able to do.
Is this possible? Thanks in advance.
If you want to count how many rows you have in Delegate that are not duplicate regarding the Value field:
SELECT count(*)
FROM Delegate
WHERE CounterField = 1
Try running a subquery:
SELECT a.DelID, a.StaffID, a.CorID, a.[Value],
(SELECT Count(*) FROM Delegate b
WHERE b.DelID <= a.DelID AND a.[Value]=b.[Value]) As CounterField
FROM Delegate a;