I have a table let's say it has four columns
Id, Name, Cell_no, Cat_id.
I need to return all columns whose count of Cat_id is greater than 1.
The group should be done on Cell_no and Name.
What i have done so far..
select Cell_no, COUNT(Cat_id)
from TableName
group by Cell_Number
having COUNT(Cat_id) > 1
But what i need is some thing like this.
select *
from TableName
group by Cell_Number
having COUNT(Cat_id) > 1
Pratik's answer is good but rather than using the IN operator (which only works for single values) you will need to JOIN back to the result set like this
SELECT t.*
FROM tableName t
INNER JOIN
(SELECT Cell_no, Name
FROM TableName
GROUP BY Cell_no , Name
HAVING COUNT(Cat_id) > 1) filter
ON t.Cell_no = filter.Cell_no AND t.Name = filter.Name
you just need to modify your query like below --
select * from tableName where (Cell_no, Name) in (
select Cell_no, Name from TableName
Group by Cell_no , Name
having COUNT(Cat_id) > 1
)
as asked in question you want to group by Cell_no and Name.. if so you need to change your query for group by columns and select part also.. as I have mentioned
This version requires only one pass over the data:
SELECT *
FROM (SELECT a.*
,COUNT(cat_id) OVER (PARTITION BY cell_no)
AS count_cat_id_not_null
FROM TableName a)
WHERE count_cat_id_not_null > 1;
Related
I have a table with data that i need to retrieve for each id and its corresponding month
every id has a specific month in which i need to use as a condition to select the records from my table. I would like to know if there is another way of me achieving this instead of having where in () with all the values , my sample is just a small snippet of the actuality data size
Is there any other way I can do this?
please may you reopen the question, i have edited it
You dont have to do one by one. You can use IN operator with the list of ids.
SELECT * FROM YourTable WHERE ID IN (1,2,3....)
If you need to compare more than one column, then define table for combination.
;WITH CTE_IDMonthCombination AS
(
SELECT *
FROM
(
VALUES
(100,1),
(101,2)
.
.
) AS t(ID, Month)
)
SELECT * FROM YourTable AS u
INNER JOIN CTE_IDMonthCombination AS c
ON c.ID = u.ID AND c.Month = u.Month;
GO
Or you can use TempTable, as you have mentioned in the comments.
SELECT *
INTO #t
FROM
(
VALUES
(100,1),
(101,2)
.
.
) AS t(ID, Month);
GO
SELECT * FROM YourTable AS u
INNER JOIN #t AS c
ON c.ID = u.ID AND c.Month = u.Month;
GO
I'm hoping for a cleaner way to do something that I know how to do one way. I want to retrieve the UserId for the MAX ID value as well as that MAX ID value. Let's say I have a table with data like this:
ID UserId Value
1 10 'Foo'
2 15 'Blah'
3 10 'Blech'
4 20 'Qwerty'
I want to retrieve:
ID UserId
4 20
I know I could do this like so:
SELECT
t.ID,
t.UserID
FROM
(
SELECT MAX(ID) as [MaxID]
FROM table
) as m
JOIN table as t ON m.MaxID = t.ID
I'm only vaguely familiar with the ROW_NUMBER(), RANK() and other similar methods and I can't help believing that this scenario could benefit from some such method to get rid of joining back to the table.
You can definitely use ROW_NUMBER for something like this:
with t1Rank as
(
select *
, t1Rank = row_number() over (order by ID desc)
from t1
)
select ID, UserID
from t1Rank
where t1Rank = 1
SQL Fiddle with demo.
The advantage with this approach is you can bring Value (or other fields as required) into the result set, too. Plus you can tweak the ordering/grouping as required.
You could also just do it with a sub-query like this:
SELECT ID ,
UserID
FROM table
WHERE ID = ( SELECT MAX(ID)
FROM table
);
SELECT TOP 1 ID, UserID FROM <table> ORDER BY ID DESC
I want to delete the duplicate(same from and same to values) tuples from a table but need to keep the tuple with minimum object id(object id is pk).
So here are columns:
from | to | time | distance | object_id
I can see the correct number of tuples that will be deleted by executing
select [from],[to],count(*)
FROM table
where [object_id] NOT IN(
SELECT min([object_id])
FROM table
group by [from],[to]
having count(*) > 1)
group by [from],[to]
having count(*) > 1
but I want to first see the object_id's which are counted on the SQL above.
You could try with this (untested)...
;WITH temp AS (
SELECT [from_id], [to_id], [object_id] = min([object_id])
FROM table
group by [from_id],[to_id]
having count(*) > 1)
SELECT
t2.[from_id],
t2.[to_id],
t.[object_id]
FROM
table t
join temp t2
on t2.[from_id] = t.[from_id]
AND t2.[to_id] = t.[to_id]
AND t2.[object_id] != t.[object_id]
EDIT:
CTE temp will yield all distinct from/to groupings with min object_id, one you would like to keep.
SELECT [from_id], [to_id], [object_id] = min([object_id])
FROM table
group by [from_id],[to_id]
having count(*) > 1
There are other pairs you would like to remove, and these are same from/to pairs, but with different object_id. Last select should output those records exactly.
When I execute my "select union select", I get the correct number or rows (156)
Executed independently, select #1 returns 65 rows and select #2 returns 138 rows.
When I use this "select union select" with an Insert into, I get 203 rows (65+138) with duplicates.
I would like to know if it is my code structure that is causing this issue ?
INSERT INTO dpapm_MediaObjectValidation (mediaobject_id, username, checked_date, expiration_date, notified)
(SELECT FKMediaObjectId, CreatedBy,#checkdate,dateadd(ww,2,#checkdate),0
FROM dbo.gs_MediaObjectMetadata
LEFT JOIN gs_MediaObject mo
ON gs_MediaObjectMetadata.FKMediaObjectId = mo.MediaObjectId
WHERE UPPER([Description]) IN ('CAPTION','TITLE','AUTHOR','DATE PHOTO TAKEN','KEYWORDS')
AND FKMediaObjectId >=
(SELECT TOP 1 MediaObjectId
FROM dbo.gs_MediaObject
WHERE DateAdded > #lastcheck
ORDER BY MediaObjectId)
GROUP BY FKMediaObjectId, CreatedBy
HAVING count(*) < 5
UNION
SELECT FKMediaObjectId, CreatedBy,getdate(),dateadd(ww,2,getdate()),0
FROM gs_MediaObjectMetadata yt
LEFT JOIN gs_MediaObject mo
ON yt.FKMediaObjectId = mo.MediaObjectId
WHERE UPPER([Description]) = 'KEYWORDS'
AND FKMediaObjectId >=
(SELECT TOP 1 MediaObjectId
FROM dbo.gs_MediaObject
WHERE DateAdded > #lastcheck
ORDER BY MediaObjectId)
AND NOT EXISTS
(
SELECT *
FROM dbo.fnSplit(Replace(yt.Value, '''', ''''''), ',') split
WHERE split.item in (SELECT KeywordEn FROM gs_Keywords) or split.item in (SELECT KeywordFr FROM gs_Keywords)
)
)
I would appreciate any clues into resolving this problem ...
Thank you !
The UNION keyword should only return distinct records between the two queries. However, if I recall correctly, this is only true if the datatypes are the same. The date variables might be throwing that off. Depending on the collation type, whitespace might be handled differently as well. You might want to do a SELECT DISTINCT on the dpapm_MediaObjectValidation table after doing your insert, but be sure to trim whitespace from both sides in your comparison. Another approach is to do your first insert, then on your second insert, forgo the UNION altogether and do a manual EXISTS check to see if the items to be inserted already exist.
Is it possible to access a temporary column that was defined in a query for a Common Table Expression? Say I have
select * from myTable
;with cte as
(
select
*, Salary * 4 as FourTimesSalary
from
Employees
where
Name = #name
and ID >= 100
)
Is there a way to use the temporary column FourTimesSalary when querying cte like so?
select top 2 *
from cte
order by FourTimesSalary, Name
TIA.
Yes you can do that. Example:
with temp as
(
select 1 as id, 2*4 as val
UNION
select 2 as id, 3*4 as val
)
SELECT * FROM temp ORDER BY VAL desc
Your example looks fine, did you get an error when you tried that or something?