Selecting Lowest DateTime If It Meets Some Conditions
Dec 6, 2012
ID (PK), userID (FK), from [Datetime], to[datetime], type [int] , value [nvarchar]
Conditions
I want to select the column "to" which is a datetime-column for all users within the table.
One user can have multiple registered rows in "mytable", so I want to select the row that contains the newest "from" date.The newest "from"-column for a specific user is where I am struggling... Because if the "to"-column of any of the registered rows by the current user is equal to the newest "from -1 day" column for the user, I want to select the second newest from-date.
Code:
//Handwritten
DECLARE @from DATETIME //Current Selected datetime [the newest of the current user doing the query]
DECLARE @id INT //userID
DECLARE @tbl TABLE (from datetime, userid int)
[code]....
But for user ID 201 [all users with Type = 1], I need to run through some more code, to figure out which date we want... Which date do I want? The "from"-date that is the newest, but if "to" is just 1 day before "from", I want to select the "from" at that row instead... Example with numbers [integers] instead of Date:
Code:
From - To
5 8
10 15
16 20
I want to select "10" in the from column as the maximum "from"-integer, and not 16. Because in the "To" column we have a match in the "from" column on the condition "To + 1" [15+ 1 == 16], so then I want the "from" value where "To" equals 15, which is 10. The top row I do not want, because the difference between From and To [10 - 8 is larger than 1]...
This means that the Image shown... I am first selecting the "1", then I do some checks, if the "to" for the user is 1 day earlier than the MAX(from) I grab a new "from" value...
Code:
SELECT MIN (t1.from) FROM table as t1
WHERE
t1.from IN
(
SELECT t2.to+ 1 FROM table as t2
WHERE t2.userID = @id
)
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Oct 25, 2007
Hi! I have a table Tbl1 has to columns:
A B
_________
Ibm Me
Sony Me
Me Bob
Me Frank
I'd like to select all rows where B=ME and A=Me Thanks for the help
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Aug 18, 2004
We have three fields in a table: firstname, Surname & Organisation. Firstname & surname will always be filled but in most cases organisation is NULL.
Part of what these fields will be used for is a mailshot. If there is no organisation data then the mailshot will open with 'Dear Firstname Surname, ' but if the organisation is present they would like 'Dear Organisation'.
Is it possible to create a select state that checks the organisation field, and if a value is present return that value else return the firstname, surname combination? I have tried various things but I cannot get it to work.
I know the ideal situation would be to do this type of condition check at scripting level (PHP, ASP, Visual Basic) but my bosses would like to try it at SQL level.
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May 14, 2014
The situation is that we have resources (trucks) that perform shifts. Shifts consists of actions. A resource can perform multiple shifts.
For every resource we want to find the record that:
- Is 'younger' than the last realized action.
- Has actionkind pickup, deliver or clean
I have constructed a solution with CTE and row_number but I was curious if there would be other alternatives. The fact that I'm joining a CTE onto itself and subject the outcome to a partition makes me think there are sharper ways.
Note that the action id in the data below is also sorted but in practice this need not be the case. The sorting key is prevalent.
output of the query is
id_action id_resource actionKindCode
4665 4 clean
34540 96 pickup
24000 901 clean
declare @mytable table (
id_action int,
id_shift int,
[code]....
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Apr 15, 2014
I am facing a problem in writing the stored procedure for multiple search criteria.
I am trying to write the query in the Procedure as follows
Select * from Car
where Price=@Price1 or Price=@price2 or Price=@price=3
and
where Manufacture=@Manufacture1 or Manufacture=@Manufacture2 or Manufacture=@Manufacture3
and
where Model=@Model1 or Model=@Model2 or Model=@Model3
and
where City=@City1 or City=@City2 or City=@City3
I am Not sure of the query but am trying to get the list of cars that are to be filtered based on the user input.
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Sep 29, 1999
I'm trying to use bcp to move a table into SQL Server 6.5. The command I am using is bcp CCI..contacts in A:Contacts.txt -fC:contacts.fmt -Usa -P -eC:errors.txt. When executing, I receive the Dr. Watson error message shown here:
Exception: access violation (0xc0000005), Address: 0x77f64d28
If I run DRWTSN32.log it shows the application error to be the following:
c0000005 RtlFreeHeap(77f64d28)
Any ideas why??
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Jan 10, 2008
My question is fairly simple. When I join between two tables, I always use the ON syntax. For example:
SELECT
*
FROM
Users
JOIN UserRoles
ON (Users.UserRoleId = UserRoles.UserRoleId)
No problems there. However, if I then decide to further filter the selection based on some trait of the UserRole, I have two options: I can add the condition as a WHERE statement, or I can add the condition within the ON block.
--Version 1:
SELECT
*
FROM
Users
JOIN UserRoles
ON (Users.UserRoleId = UserRoles.UserRoleId)
WHERE
UserRoles.Active = 'TRUE'
-- Version 2
SELECT
*
FROM
Users
JOIN UserRoles
ON (Users.UserRoleId = UserRoles.UserRoleId
AND UserRoles.Active = 'TRUE')
So, the question is, which is faster/better, if either? The Query Analyzer shows the two queries have the exact same execution plan, which makes sense, since they're both joining the same tables. However, I'm wondering if adding the condition in the ON statement results in fewer rows the JOIN statement initially needs to join up, thus reducing the overall initial size of the results table before the WHERE conditions are applied.
So is there a difference, performance wise? I imagine that if Users had a thousand records, and UserRoles had 10 records, then the JOIN would create a cartesian product of the two tables, resulting in 10,000 records in the table before the WHERE conditions are applied. However, if only three of the UserRoles is set to Active, would that mean that the resulting table, before applying WHERE conditions, would only contain 3000 records?
Thanks for whatever information you can provide.
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Feb 25, 2015
CREATE TABLE #tblTemplateBlocks
(
TemplateID int,
BlockID int,
OrderID int
[Code] ....
I have a table called TemplateBlocks which contains which Blocks are on a Template. In this example - just one template - with three Blocks.
Table tblFields contains a list of Fields that are on each TemplateID/BlockID. In this example there are 3 fields on each TemplateID/BlockID pair.
Before I can use a template, I have to check that, in tblFields, for each Template/BlockID pairing - one of the fields must be set as the Stage Base (I cannot have 2 fields as StageBase or no fields as StageBase). In the example data above, the data would be okay as each Template/BlockID pairing has one row where StageBase is true.
Having checked that each Template/BlockID pairing has a StageBase, I need to check that each row where StageBase is true has a value for the WeekStart column and that, taking into account the order of the Blocks in tblTemplateBlocks, the values in WeekStart for each TemplateID/BlockID pairing are getting progressively bigger.
So, for example, the example data above would fail because the third TemplateID/BlockID pairing has no value for the WeekStart column in the row where StageBase is true.
If I added a value of 2 for WeekStart in the row for the third TemplateID/Block that has a StageBase of true - again the data would fail because, taking into account the order of the Blocks - the values for WeekStart would be 0,3,2 and these numbers need to increase.
0,3,4 would be fine.
0,3,10 would be fine.
0,3,3 would fail.
I can do this easily using a cursor or two - but how to do this without cursors.
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Nov 30, 2004
OK, this should be an easy one but my brain isn't quite working right now.
I have a table, we'll call Table1 like so:
ProductID Supplier Cost
12345 A 14.50
12345 B 13.49
12345 C 12.00
43222 A 15.00
43222 B 15.21
43222 C 13.99
12312 B 14.00
15421 A 21.99
15421 C 20.00
And I want to Get the name of the Supplier with the Lowest cost,
I know I can go like:
SELECT ProductID, MIN(Cost) FROM Table1 GROUP BY ProductID
and get the lowest cost, but what would be the most effiecent way to get all three fields returned by the query? I need the ProductID, Supplier and Cost.
Thanks,
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Sep 14, 2012
SELECT
@AppId AS Application_Id
, MB.POLICY_ID AS Policy_Id
, MH.BFN_CHG_DATEAS Date_Of_Disinvestment
, AD.X_INVEST_AMT AS Original_Investment_Value
, MB.TOTAL_AMOUNT AS Encashment_Value
, WH.TOT_COMMISSION AS Top-Up_Commission
FROM: I select from lot of table, as specified from my select statement
My output:
AppId PolicyId Date_Of_DisIn Original_Inv Encashment_Value Top-Up_Commision ???
1-1-1; 1000000; Jan-01-12; 2882.07; 3312.00; 2306; ??
My Aliases returns just one values, of which that's what I am expecting, so I need to make a comparison between Original_Investment_Value and (Encashment_Value + Top-Up_Commision), and return the lowest value
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Jul 23, 2005
Is there a more elegant way to do the following?...declare @d1 datetime, @d2 datetimeset @d1 = '2005-01-01'set @d2 = '2005-02-01'selectcasewhen datediff(dd,@d2,@d1)is nullthen coalesce(@d1, @d2)when (datediff(dd,@d2,@d1)> 0)then @d2else @d1endCheers,..N
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Aug 29, 2007
Hi, this seems to be an easy question but I can't find a quick answer to it.
I have an asp page that communicates with a database and I want the following example to work...
Insert 5 records into the DB with primary keys 1-5.
Remove record with key number 2.
Now, if I insert a new record I want it to take the smallest available key number (in this case number 2). This will save space in the database and keep the key numbers from increasing forever.
Does auto increment work like this?
If not, how do I do it?
Thanks for any replies!
Niklas
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Sep 20, 2007
I've got a big problem that I'm trying to figure out:
I have an address table out-of-which I am trying to select mailing addresses for companies UNLESS a mailing address doesn't exist; then I want to select the physical addresses for that company. If I get multiple mailing or physical addresses returned I only want the most recently edited out of those.
I don't need this for an individual ID select, I need it applied to every record from the table.
My address table has some columns that look like:
[AddressID] [int]
[LocationID] [int]
[Type] [nvarchar](10)
[Address] [varchar](50)
[City] [varchar](50)
[State] [char](2)
[Zip] [varchar](5)
[AddDate] [datetime]
[EditDate] [datetime]
AddressID is a primary-key non-null column to the address table and the LocationID is a foreign key value from a seperate Companies table.
So there will be multiple addresses to one LocationID, but each address will have it's own AddressID.
How can I do this efficiently with perfomance in mind???
Thank you in advance for any and all replies...
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May 25, 2004
bp server with the lowest price
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Jun 2, 2008
Im having trouble finding a solution to comparing columns to find the lowest value.
Example
Row 1
COL 1 = 10
COL 2 = 20
COL 3 = 60
COL 4 = 5
COL 5 = 35
I would want to return 5.
I tried to write a case statement such as below but am unable to use Logical Operators.
WHEN C1 <= C2 and C1<= C3 THEN C1
WHEN C2 <= C3 THEN C2
ELSE C3
any help would be great.
Thanks,
Nick
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Feb 11, 2007
(Spam Removed)
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Dec 20, 2007
I'm using sql express 2005. I need help with buliding a view.
I'm trying to join two tables and then, if duplicate ID's exist, retrieve the row with the lowest value in a specific column.
For instance:
TableHousehold:
ID Name Status
001 The Smith€™s A
002 The Jone€™s A
003 The Adam€™s A
004 The Grant€™s A
TableResidents
Pk HouseholdID ResidentID Name Gender
1 001 1 Mary Smith F
2 001 2 Jason Smith M
3 001 3 Rachel Smith F
4 002 1 Mike Jones M
5 002 2 Sara Jones F
6 003 2 Erik Adams M
The resident ID is auto increment and assigned by the server. It is possible for resident 1 for each household to have been deleted. It is also possible that a household does not contain any residents. Therefore, I wish to join these tables and return this:
ID HouseHoldName Status ResidentName Gender
001 The Smith€™s A Mary Smith F
002 The Jone€™s A Mike Jones M
003 The Adam€™s A Erik Adams M
004 The Grant€™s A null null
There are other columns in both tables that I will want to join, but for simplicity, the above example illustrates my need.
I was able to accomplish this by creating two views. But I€™d like to try and do this in one.
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Jul 13, 2006
Hello,
I have a long stored procedure that performs some inserts and updates on the table that users are accessing through a user interface. We this stored procedure runs users experience slowness, is there any way I can get the stored procedure runs with a lowest priority so that user will be able to perform their tasks first.
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Mar 13, 2006
I have a little problem that I just haven't been able to solve. I don't think it is very difficult but I can't seem to make it work. Here's the scenario:
I have a database with the following values:
Model Make Price
DA1100 GTN$88.00
DA1100 GTN $100.00
DA1000 GBN$110.00
DA668 GTN$100.00
DA880 GTN$200.00
In this case DA1100 is listed twice with 2 different prices. I only want to display the one with the lowest price. So the result I want is:
Model Make Price
DA1100 GTN$88.00
DA1000 GBN$110.00
DA668 GTN$100.00
DA880 GTN$200.00
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Dec 19, 2013
finding the first value to cross a specific threshold in SQL Server
LoadTemp1 LoadTemp2 LoadTemp3 TimeStamp
300 350 200 12-10-2013 13:30
177 238 333 12-10-2013 13:05
240 190 170 12-10-2013 12:45
How do I design query to find the first LoadTemp* that cross a threshold of 340 degrees per TimeStamp.
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May 8, 2007
I need to display the difference between the highest and lowest salaries. Label the column DIFFERENCE. like below:
From what I came up with is should look something like so:
<b>SQL> select * from 'salary' order by salary desc limit
select * from 'salary' order by salary desc limit 1,1 </b>
DIFFERENCE
------------------
4200
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Oct 4, 2007
Let's say I have a result set (records) containing numbers such as:01239162145100101102103104105106How might someone write a procedure to get the next lowest number inthis sequence? In this case it would be: 4. Some combination ofSelect, Min & When, I am sure, but it escapes me at the moment.Thoughts? Thanks...
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Jul 13, 2006
Hello,
I have a long stored procedure that performs some inserts and updates on the table that users are accessing through a user interface. We this stored procedure runs users experience slowness, is there any way I can get the stored procedure runs with a lowest priority so that user will be able to perform their tasks first.
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Apr 4, 2012
I am attempting to only query the lowest year, and month from my entire production database. I am using the following query and when I do it individually it will bring back the lowest year but also with additional years. How can I remove those other years so I can only query the lowest year and month from the entire database?
Code:
select distinct RRCID, MIN(YEAR)as YEAR, MONTH
from Gas_Prodv1
where RRCID = 1221376
group by RRCID, MONTH
order by YEAR, MONTH
Results:
122137620071 <----- Only want this record
122137620072
122137620073
122137620075
122137620076
122137620077
122137620078
122137620079
1221376200710
1221376200711
1221376200712
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Jan 21, 2004
I have a table and am usuing ASP to query the database, the connection is to a MS Access table at the moment but am working to convert to SQL Server.
Question:
I need to select the last 20 records, by a date field, then from those 20 records select the 10 lowest scores.
Example is a member logs on an that member has say 80 total records in the table. Then I need to select the last 20 records entered by the date field then select the lowest 10 scores out of those 20.
I am new to more compex SQL Statements any help would be mostly appreciated!
table = HC_ID
date field = date
member_id = member
score = ScoreHC
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Nov 19, 2007
ID
Original_Date
Date1
Date2
Lowest_Date
1
12/2/07
14/02/07
18/02/2007
14/02/2007
2
01/03/07
23/3/2007
11/3/2007
11/03/2007
3
15/4/2007
14/05/2007
16/05/2007
14/5/2007
4
6/6/07
8/6/07
9/6/06
8/6/07
I have a select query that looks like this
Select table1.id, table1.original_date,
(select €¦€¦..from €¦..) as Date1,
(select €¦€¦..from€¦..) as Date2
from table1
Date 1 and Date 2 are both complex subqueries that retrieve a date from other tables. I would like another column displaying the oldest date between date1 and date2. Can anyone help?
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Mar 21, 2014
Trying to get the lowest unused value of CrewID from the below table in a efficient manner. I cant change the table structure as its from a 3rd party and it would break our support agreement.
CREATE TABLE [dbo].[Crews](
[CrewID] [nvarchar](10) NOT NULL,
[CrewName] [nvarchar](200) NOT NULL,
[CompanyID] [nvarchar](10) NOT NULL,
[StartTime] [nvarchar](50) NULL,
[Code] .....
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Jan 13, 2015
I have following input:
CREATE TABLE #tree
(
Childid varchar(20),
Parentid varchar(20)
)
INSERT INTO #tree
(Childid,ParentId)
SELECT '123' , null UNION ALL
SELECT '456' , '123' UNION ALL
SELECT '789' , '456' UNION ALL
SELECT '870' , '456' UNION ALL
SELECT '985' , '870';
Input:
Child IDParent ID
123 NULL
456 123
789 456
870 456
985 870
I am trying to populate lowest level child with path and depth...Output should be:
Child IDParent IDLast ChildPath Depth
123 NULL 789/123 1
456 123 789/123/456 2
789 456 789/123/456/789 3
123 NULL 985 /123 1
456 123 985/123/456 2
870 456 985/123/456/870 3
985 870 985/123/456/870/9854
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Feb 16, 2015
I Have 3 Tables
How to Get This Result :
ProductId - ProductConfigId (With Min Price) -MinPrice - HasGift
1 > 3 > 70 > 1
2 > 4 > 700 > 1
3 > 7 > 820 > 0
5 > 9 > 55 > 1
------------------------------------------------------
CREATE TABLE [dbo].[TBL_Product](
[ID] [int] IDENTITY(1,1) NOT NULL,
[ProductName] [varchar](100) NULL
) ON [PRIMARY]
GO
CREATE TABLE [dbo].[TBL_ProductConfig](
[Id] [int] IDENTITY(1,1) NOT NULL,
[Code] .......
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Jul 9, 2015
I have just been running a query which I was planning on improving by removing a redundant GROUP BY (there are about 20 columns, and one of the columns returned is atomic, so will mean that the "group by" will never manage to group any of the data) but when I modified the query to remove the grouping, this actually seems to slow the query, and I can't see why this would be the case.
Both queries return the same number of rows (69000), as I expected, and looking at the query plan, then they look nearly identical, other than at the start, there is a "stream aggregate" and "sort" being performed. The estimated data size is 64MB for the non-grouped query (runs in 6 min 41 secs), vs 53MB for the aggregated query (runs in 5 min 31 secs), and the estimated row size is smaller when aggregated.
Can rationalise this? In my mind, the data that is being pulled is identical, plus there is extra computation for doing an unnecessary aggregation, so the aggregated query should be unquestionably slower, but the database engine has other ideas; it seems to be able to work more quickly when it needs to do unnecessary work :) Perhaps something to do with an inefficient query plan for the non-aggregated query? I would have thought looking at the actual execution plan might have made this apparent, but both plans look very similar.
Edit: More information, the "group by" query had two aggregations on it, a count of one of the columns, and an average of another one. I changed this so that it was just "1" instead of the count, and for the average, I changed it to be the expression within the average aggregate, since the aggregation effectively does not do anything.
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Jan 26, 2008
Hello Group,
I'm still a bit new to T-SQL and am wondering how to get various LOWEST values from a table, rather than TOP values. There does not appear to be a keyword opposite of TOP in T-SQL.
My real problem is this: I know how to get the 2nd highest value, third highest value, etc...but how does one get the 2nd lowest value, third lowest value, etc?
Would anyone be able to help?
Thanks!!
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Jun 22, 2015
I have hierarchical data such as:
Id   Level   ParentId
1Â Â Â 0Â Â Â Â Â Â 1
2Â Â Â 1Â Â Â Â Â Â 1
3Â Â Â 2Â Â Â Â Â Â 2
4Â Â Â 0Â Â Â Â Â Â 4
5Â Â Â 1Â Â Â Â Â Â 4
6Â Â Â 0Â Â Â Â Â Â 6
7Â Â Â 1Â Â Â Â Â Â 6
8Â Â Â 2Â Â Â Â Â Â 7
9Â Â Â 3Â Â Â Â Â Â 8Â Â Â Â Â Â
10Â Â 4Â Â Â Â Â Â 9
11Â Â 0Â Â Â Â Â Â Â Â 11
As you can see even the parent element has parentId(in this case id = parentid)
How can I select the lowest level data in the hierarchy and get this result:
Id   Level   ParentId
3 Â Â 2 Â Â Â Â Â 2
5Â Â Â 1Â Â Â Â Â Â 4
10Â Â 4Â Â Â Â Â Â 9
11Â Â 0Â Â Â Â Â Â Â Â 11
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Mar 11, 2015
I've got a fairly large hierarchy table and I'm trying to put together a query to find the lowest level descendants of the hierarchy. I think there must be some way to use the "Breadth-first" approach that's stated in the MSDN technet sites about SQL Server HierarchyID but i'm not sure how to write the necessary T-SQL to traverse that. I know I can get all the descendants of a parent node like this
SELECT *
FROM AdventureWorks2012.HumanResources.Employee
WHERE OrganizationNode.IsDescendantOf(@ParentNode) = 1
However, this query returns all levels for that parent's branch. If I just wanted list of employees that were at the lowest level of the branch(es) for this parent node, how would I do this?
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