Suppose my table has below 3 columns:
Col1 Col2 Col3
2 A A
3 B A
4 C A
4 D B
5 E B
6 F B
Output
Col1 Col2 Col3
9 A A
9 B A
9 C A
15 D B
15 E B
15 F B
I want grouping based on column 3 and want to sum first 3 rows and they should show as 9,9,9 in output. I want to fetch all records from column 2 also.
Select Sum(Col1), Col2, Col3 from Table
Group by Col2, Col3
I have used group by and over (). Not able to get this output.
Kindly let me know how this can be achieve.
We can try using SUM() as an analytic function here:
SELECT SUM(Col1) OVER (PARTITION BY Col3) AS Col1, Col2, Col3
FROM yourTable
ORDER BY Col2;
Related
I have the following table with Postgres:
Id Col1 Col2 Col3
1 A 1 x
2 A 0 y
3 A 0 z
4 B 0 x
5 B 1 y
6 C 0 z
As part of a select query, I want to be able to drop duplicates in Col1, based on the highest Col2 values (where will never be multiple highest values per Col1 value), and keep the corresponding Col2, Col3 values.
Desired output:
Id Col1 Col2 Col3
1 A 1 x
5 B 1 y
6 C 0 z
In Postgres, you can use distinct on:
select distinct on (col1) t.*
from t
order by col1, col2 desc;
I have a sql query that is outputting:
col1 col2
A 1
B 3
C 4
D 5
Is there a way to add a column where it outputs the sum of all the numbers in col2?
col1 col2 col3
A 1 13
B 3 13
C 4 13
D 5 13
You can use window functions:
select col1, col2, sum(col2) over () as col3
from t;
Let's suppose a have a very simple query in SQL
SELECT Col1,Col2 From Table1
and it gives me result:
Col1 Col2
A 5
A 7
A 2
B 1
B 1
B 4
B 0
C 4
C 1
C 2
I want to count rows in groups made by Col1 and in order made by Col2. If values in Col2 for some rows in group are equal then they should have different numbers, as shown in example
So I want to have
Col1 Col2 Nr
A 5 2
A 7 3
A 2 1
B 0 1
B 1 2
B 1 3
B 4 4
C 4 3
C 1 1
C 2 2
Any ideas how to make it?
If your database supports window functions, use ROW_NUMBER
select col1,col2,row_number() over(partition by col1 order by col2) as nr
from tablename
If your database doesn't support window functions, use
select col1,col2,
(select count(*)+1 from tablename t1 where t1.col1=t.col1 and t1.col2<t.col2) as nr
from tablename t
You can use the row_number window function:
SELECT col1,
col2,
ROW_NUMBER() OVER (PARTITION BY col1 ORDER BY col2 ASC) AS Nr
FROM table1
ORDER BY 1, 2, 3
I have looked high and low on SO for an answer over the last couple of hours (subqueries, CTE's, left-joins with derived tables) to this question but none of the solutions are really meeting my criteria..
I have a table with data like this :
COL1 COL2 COL3
1 A 0
2 A 1
3 A 1
4 B 0
5 B 0
6 B 0
7 B 0
8 B 1
Where column1 1 is the primary key and is an int. Column 2 is nvarchar(max) and column 3 is an int. I have determined that by using this query:
select name, COUNT(name) as 'count'
FROM [dbo].[AppConfig]
group by Name
having COUNT(name) > 3
I can return the total counts of "A, B and C" only if they have an occurrence of column C more than 3 times. I am now trying to remove all the rows that occur after the initial value of column 3. The sample table I provided would look like this now:
COL1 COL2 COL3
1 A 0
2 A 1
4 B 0
8 B 1
Could anyone assist me with this?
If all you want is the first row with a ColB-ColC combination, the following will do it:
select min(id) as id, colB, colC
from tbl
group by colB, colC
order by id
SQL Fiddle
This should work:
;WITH numbered_rows as (
SELECT
Col1,
Col2,
Col3,
ROW_NUMBER() OVER(PARTITION BY Col2, Col3 ORDER BY Col3) as row
FROM AppConfig)
SELECT
Col1,
Col2,
Col3
FROM numbered_rows
WHERE row = 1
SELECT DISTINCT MIN(COL1) AS COL1,COL2,COL3
FROM TABLE
GROUP BY COL2,COL3
ORDER BY COL1
I've got lets say the next table
A B C 1
D E F 1
G H I 1
I want to append to this table the same records but with the 3rd column having the value 2.
like this:
A B C 1
D E F 1
G H I 1
A B C 2
D E F 2
G H I 2
Can someone help me with the sql query?
INSERT INTO <table> (col1, col2, col3, col4)
SELECT col1, col2, col3, 2 AS col4
FROM <table>
Extended answer to your question:
Now is there a way to run this with a single query multiple times? For example I want to have in the last column values from 1 to 7 ie having 7x3 = 21 records in the table.
T-SQL only code:
insert into tab col1, col2, col3, col4
select col1, col2, col3, max(col4) + 1
from tab
group col1, col2, col3
go 6
6 at the end is intentionally, execute it when table is in the initial state (3 rows).