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Let suppose there four entries in table as shown below.I want only Row 1 and 2 in resultset.
The vice versa case of 1 and 2 in Row 3 and 4 should be excluded. Please suggest a query for that
Pk Col1 Col2 Col3 Col4
1 A B 20 30
2 E D 40 50
3 B A 20 30
4 D E 40 50
WHERE Col1 < Col2 immediately comes to mind. Actually, that would give you rows 1 and 4, but I presume that's good enough for yuor purposes.
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So let's say we have a table called phone.
and i need another column to show the average cost of a brand phone
I know i can do something like this:
SELECT brand, AVG (cost)
FROM Phone
GROUP BY brand;
and get something like this table:
Can someone help me how i would get this result below using a select sql statement?
You can use avg(cost) over (partition) such as this:
select *,
round(avg(cost) over (partition by brand), 2) as avg_cost
from phone;
phoneid
brand
cost
avg_cost
2
apple
8
10.00
6
apple
12
10.00
3
google
7
6.50
4
google
6
6.50
1
samsung
10
9.33
5
samsung
4
9.33
7
samsung
14
9.33
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I want to make this Query into a Linq Query:
Select name,sum(qty) as qty from tblCars groub by name
Table:
Name | Qty
Ferrari 1
Nissan 2
Ferrari 2
Honda 3
Honda 1
Name | Qty
Ferrari 3
Nissan 2
Honda 4
I want to be able to achieve that using an array or list in VB.net and Linq.
tblCars.GroupBy(Function(x) x.Name).Select(Function(x) New With {.Name = x.Key, .Sum = x.Sum(Function(s) s.qty)})
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select a single unique record in a column if records are duplicate
we a class table
c_id
timing
we have records as (c_id,timing) values
1 | 3-5
2 | 5-7
3 | 3-5
4 | 7-9
5 | 9-11
6 | 11-1
7 | 7-9
we select all timing but we have 3-5 and 7-9 timing record 2 times when we select the timing it show only 1 time and other timing show like
3-5
5-7
7-9
9-11
11-1
If all you want is just the unique timing then use:
SELECT timing from class_Table group by timing
Unless there's other information you are trying to get from this query. Is there any additional info you can give us?
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In my table 2 columns are there. Name and Marks. Something like this.
Name Marks
---------- -----------
AAA 50
BBB 48
CCC 54
AAA 52
DDD 55
BBB 60
AAA 66
I need to retrieve from the table something like below
Name No.of.attempts Max Mark
------- ---------------- ------------
AAA 3 66
BBB 2 60
CCC 1 54
DDD 1 55
You should do like:
select name,count(name) as no_of_attempts,max(marks)
from table_name
group by name
fddle demo here
you can do it like this
select name,COUNT(name) as nameCount,MAX(markes) as marks from #abc group by name
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I am getting records as below:
PERIOD LABEL1 LABEL2 LABEL3 LABEL4
-----------------------------------
1 12
1 14
1 11
2 10
2 09
and so on..
I want it like below:
PERIOD LABEL1 LABEL2 LABEL3 LABEL4
-----------------------------------
1 12 14 11
2 10 09
Hope its clear.
If you only have positive values, you can use a mix of nvl and max:
select period,
max(nvl(label1, 0)) label1,
max(nvl(label2, 0)) label2,
max(nvl(label3, 0)) label3,
max(nvl(label4, 0)) label4
from my_table
group by period;