SQL Server 2008 :: Turning Complex Query Into Temp Tables
Mar 5, 2015
do you have a general rule of thumb for breaking a complex query into temp tables? For someone who is not a sql specialist, a query with more than a few table joins can be complex. So a query with 10+ table joins can be overwhelming for someone who is not a sql specialist.
One strategy is to break a problem into pieces so to speak by grouping together closely related tables into temp tables and then joining those temp tables together. This simplifies complex SQL and although not as performant as one big query it's much easier to understand. So do you have a general rule of thumb as far as a threshold for the number of joins you include in a query before you break the query into temp tables?
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Feb 12, 2015
Let's say that I have a stored proc that is assigned to a service broker queue and is constantly running while it waits for messages in said queue. When a message comes in on the queue, the stored proc creates a table variable based off of the contents of the message and performs various operations with the data. Since the stored proc is constantly running, do the contents of this table variable ever truly get emptied? Should I be deleting the contents of the table variable at the end of the operation to ensure that stale data doesn't persist?
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Apr 30, 2015
I've recently started a new position and our production box. Contains a procedure that uses 30 + temp tables. I'm currently not in a position to change this as it's production and I would have to be granted a window to re-design.
However the tempDb is showing some strange activity.
If a table is created #CarrierService (CarrierServiceID,DeliveryZoneID,CollectionZoneID) for example
Once the procedure is called It will appear in the tempDB with the session info appended as expected
#CarrierService________________________________________________________2C78E45A
However once the session has ended the above table will get dropped and a new one created
#2C78E45A, I now have 7000 of these different Tables in the TempDB
When I Interrogate this using
SELECT o.name, o.create_date,o.modify_date , c.Name,C.Column_Id
FROM tempdb.sys.Objects o
Inner join tempdb.Sys.Columns c
ON o.object_id =c.Object_ID
WHERE o.type ='U'
I get the Following results
name create_date modify_date object_id name
#2C78E45A26/04/2015 18:0930/04/2015 14:55746120282CarrierServiceId
#2C78E45A26/04/2015 18:0930/04/2015 14:55746120282CollectionZoneId
#2C78E45A26/04/2015 18:0930/04/2015 14:55746120282DeliveryZoneId
Notice How It's getting Modified today.
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May 25, 2015
For finding size values of temp database:
select * from sys.master_files -
size column value here is 1024 for .mdf,size here for .ldf is 64
select * from tempdb.sys.database_files -
size column value here is 3576 for .mdf,size here for .ldf is 224
Why is there a difference and not the same. size columns in the above 2 tables for temp db's do they represent different values ?
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May 25, 2015
1) "Deferred compile" recompile event occurs because of deferred name resolution. In other words, an object referred to in the statement does not exist at compile time. Later, when the object does exist, it requires a recompile of the statement so that it can create an optimal execution plan. One example of when a deferred compile will occur is if a temporary table is used in a batch and does not exist when the first statements in the batch are compiled.
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Jul 14, 2015
here's an example of what I am trying to do.
--Exec Database.Employees
--Use Database
--Go
--Create PROCEDURE AEM.TempTable
--AS
--BEGIN
--Select * into #emptemp From Database.Employees
--End
--Select * From #emptemp
Is something like this possible? I can get the EXEC to run the "Select * into #emptemp From Database.Employees" statement, but when I try to use the temp table it doesnt see it.
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Apr 6, 2015
I have a dynamic sql which uses Pivot and returns "technically" variable no. of columns.
Is there a way to store the dynamic sql's output in to a temp table? I don't want to create a temp table with the structure of the output and limit no. of columns hence changing the SP every time I get new Pivot column!!
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May 12, 2008
--Environment: SQL Server 2000
I am doing following query for who is reaching of Age 65/75 in May 2008 but Member_DOB's or Spouse_DOB's showing different month. Month should show '05' because I want to see results who is reaching of age 65/75 in May 2008 only.
Please help in this regard.
--Query:
Select m.empid, m.dob "Member_DOB",
round(datediff(dd,m.dob,'05/30/2008')/365.25,1) Member_Age,
d.dob "Spouse_DOB",
round(datediff(dd,d.dob,'05/30/2008')/365.25,1) Spouse_Age
from member m
left outer join (SELECT * FROM depend where depcode = 'S' and activestatus = 1)d
on m.empid = d.empid
where (datepart(yy,m.dob) in (1933,1943) or
datepart(yy,d.dob) in (1933,1943))
and round(datediff(dd,m.dob,'05/30/2008')/365.25,1) in (65,75)
or round(datediff(dd,d.dob,'05/30/2008')/365.25,1) in (65,75)
--Results:
Empid Member_DOB Member_Age Spouse_DOB Spouse_Age
000000033 1931-12-07 00:00:00.000 76.500000 1933-06-16 00:00:00.000 75.000000
000000085 1933-05-23 00:00:00.000 75.000000 1938-03-10 00:00:00.000 70.200000
000000695 1933-06-10 00:00:00.000 75.000000 1934-07-08 00:00:00.000 73.900000
000000792 1931-01-15 00:00:00.000 77.400000 1933-06-05 00:00:00.000 75.000000
000002406 1933-05-27 00:00:00.000 75.000000 NULL NULL
000004149 1933-05-20 00:00:00.000 75.000000 NULL NULL
Desired results:
Member_DOB and Spouse_DOB's should show '05' i.e. 1931-05-07, 1931-05-15
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Apr 1, 2006
I'm attempting to create a complex query and i'm not sure exactly how i need to tackle I have a series of tables:
[tblEmployee]
empID
empName
deptID
jobtID
[tblDept]
deptID
deptNum
deptName
[tblJobTitle]
jobtID
jobtNam
[tblTrainng]
trnID
trnName
[tblTrnRev]
trnrevID
trnID
trnrevRev
trnrevDate
[tblEduJob]
ejID
jobtID
trnID
[tblEducation]
eduD
empID
trnrvID
eduDate
The jist of this database is for storage of training. The Training table is used for storing a list of training classes. The TrnRev links and shows each time the training was updated. The EduJob table links each Job title (position) in the company to each trainng class that position should be trained on. The Education table links each employee to which revision of a class they have attended.
What i need to do is create a query that for each employee, based on their job title, wil show what classes they are required to be trained on. I want the query to return the employee, the training, the latest revision of that class, and then show if a) the person's trainig is current for that revision, b) the person has been trained on that topic but not the latest revision, or c) they've had no training at all on that topic.
i'm somewhat at a loss of where to begin.
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May 17, 2013
I'm joining several tables and when I add the last one I get duplicate results. How can I get just one for each?
select a.field, b.field, c.field
from atblname as a inner join btblname as b on a.id = b.parent_id
left outer join ctblname as c on a.id = c.parent_id
There are more than one result when joining tbl a and c, but I'm getting a reult for each of them for all results from joining a and b.
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Mar 23, 2015
I have Two tables @master and @child
Master Table :
MasterID EntryNumber BranchId IsstockIn
1 1 1 1
2 1 1 0
Child Table:
CEntryNumber CBranchID EntryQty
1 1 10
1 1 20
1 1 -5
1 1 -4
My Query:
Select SEC.EntryQty from Item.StockEntryChild SEC
where SEC.CEntryNo =
(
select SEM.EntryNumber from item.StockEntryMaster SEM
where SEC.CBranchID=SEM.BranchID and SEC.CEntryNo=SEM.EntryNumber and SEM.MasterID=1 and SEM.isStockIn=1
)
My Result:
EntryQty
10
20
-5
-4
Expected Result:
10
20
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Aug 30, 2004
Hi All,
I have 4 temporary tables that hold criteria selected through a report wizard.
I've created a SQL statement and used the four tables in my WHERE/ AND clauses but the results retuned are not being filtered correctly.
Would somebody be kind enough to help me out please.
To briefly summarise, I have created a SQL statement that returns all rows in my recordset, I now need to implement some additional SQL to filter the recordset using my temporary tables, which contain the filters as follows:
(1) Temp table 1 (##tblTempAssetFilt) is mandatory and will always contain at least one row.
(2) Temp table 2 (##tblTempRepairTypeFilter) is optional and may never contain any rows. If this is the case then I have no reason to filter my resultset against this table.
(3) Temp table 3 (##tblTempRepairFilter) / Temp table 4 (##tblTempRepairElementFilter) are both optional, only one of these tables will contain data at one time. Again, as an optional filter the tables may never contain rows, and thus need to be ignored.
I have the following SQL, can somebody tell me how I would go about filtering the recordset using the temporary tables. The creation of the temporary tables occurs at the beginning so will always exist even when no rows have been inserted.
SELECT *
FROM tblActualWork [ActualWork]
JOIN tblRepair [Repair] ON ActualWork.intRepairID = Repair.intRepairID
JOIN tblRepairElement [RepairElement] ON Repair.intRepairElementID = RepairElement.intRepairElementID
JOIN tblRepairType [RepairType] ON Repair.intRepairTypeID = RepairType.intRepairTypeID
JOIN tblAsset [Asset] ON ActualWork.intAssetID = Asset.intAssetID
WHERE ActualWork.intAssetID IN (Select intAssetID From ##tblTempAssetFilter) AND Repair.intRepairTypeID IN (Select intRepairTypeID From ##tblTempRepairTypeFilter)
AND Repair.intRepairID IN (Select intRepairID From ##tblTempRepairFilter)
AND Repair.intRepairElementID IN (Select intRepairElementID From ##tblTempRepairElementFilter)
Any filtering must be based on the recordset filtered by temp table 1, which is a mandatory filter. Rows will always exist in this temp table.
Please help, not having much joy with this. Many thanks.
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Aug 20, 2015
I've been asked to find the Mode of the loads on trips we run. So I run a count on the [loads] (without grouping, in an analytical function) column, then sort on the highest counts. The problem is when there is a tie. In that case, I need to find the mean of all the tied values. This means that if there is no mode at all, it would simply take the mean of all the values.
Here is sample data:
CREATE TABLE test6
(
trip char(1) NULL,
date int NULL,
loads int NULL
[Code] ...
And here is what I'd like to see:
CREATE TABLE test7
(
trip char(1) NULL,
loads int NULL
)
insert into test (trip, loads)
values ('A', 15)
insert into test (trip, loads)
values ('B', 17)
insert into test (trip, loads)
values ('C', 11)
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Nov 16, 2004
Is there a quick way to create a temp table that is the same as an existing table in the schema? I am used to Informix where "select * from <table A> into temp B" would create the temp table B with the same schema is table A. Is this same functionality available with MS SQL server using query analyzer?
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Aug 29, 2013
I have the following query and I would like to combine it into one query instead of using several temp tables.
IF OBJECT_ID('Tempdb..#a') IS NOT NULL DROP TABLE #a
SELECT *
INTO #a
FROM #Web_table w WITH(NOLOCK)
WHERE w.generated_date IS NOT NULL
IF OBJECT_ID('Tempdb..#b') IS NOT NULL DROP TABLE #b
[code]....
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Feb 5, 2008
I have a table T1 with columns: Date, Salesman, Sales. Salesman is a userid for each person and Sales is a decimal capturing sales done on Date.
From the data in T1 I would like to have a table with the following:
Salesman Sales-To-Date Sales-Last-Week
I have been able to do it with a temporary table, temp, as follows:
select Salesman, Sum(Sales) as ToDate into temp from T1 group by Salesman
with T2 as (
select Salesman, Lastweek=sum(Sales) from T1 where week>='1/28/2008' and week<='2/3/2008' group by Salesman
) select temp.Salesman, ToDate, Lastweek from temp full join T2 on temp.Salesman=T2.Salesman
How can I do the above in one query statement?
Thanks
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Sep 30, 2015
I have list (in an input file) where each row is about 20K in size (so it can't be stored in a sql table). I want to convert the list into a table as shown below:
before:
---------------
pk1, c1, d1, c2, d2, c3, d3,......
pk2 c1,d1,c2,d2,c3,d3.....
where "pk" denotes a primary key and in a given row (c1,c2.c3,...) are all distinct. ("c" are columns names, "d" is the associated data)
after: (desired conversion)
---------------
pk1,c1,d1
pk1,c2,d2
pk1,c3,d3
...
pk2,c1,d1
pk2,c2,d2
pk2,c3,d3
....
I was planning to have SSIS pull in the "before" data, run a custom C# program in SSIS against it to massage the data to vertical (3-column format), then export the massaged data to a new text file. The new text file would later be imported into a sql table using SSIS.
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Nov 17, 2004
Hi all,
Looking at BOL for temp tables help, I discover that a local temp table (I want to only have life within my stored proc) SHOULD be visible to all (child) stored procs called by the papa stored proc.
However, the following code works just peachy when I use a GLOBAL temp table (i.e., ##MyTempTbl) but fails when I use a local temp table (i.e., #MyTempTable). Through trial and error, and careful weeding efforts, I know that the error I get on the local version is coming from the xp_sendmail call. The error I get is: ODBC error 208 (42S02) Invalid object name '#MyTempTbl'.
Here is the code that works:SET NOCOUNT ON
CREATE TABLE ##MyTempTbl (SeqNo int identity, MyWords varchar(1000))
INSERT ##MyTempTbl values ('Put your long message here.')
INSERT ##MyTempTbl values ('Put your second long message here.')
INSERT ##MyTempTbl values ('put your really, really LONG message (yeah, every guy says his message is the longest...whatever!')
DECLARE @cmd varchar(256)
DECLARE @LargestEventSize int
DECLARE @Width int, @Msg varchar(128)
SELECT @LargestEventSize = Max(Len(MyWords))
FROM ##MyTempTbl
SET @cmd = 'SELECT Cast(MyWords AS varchar(' +
CONVERT(varchar(5), @LargestEventSize) +
')) FROM ##MyTempTbl order by SeqNo'
SET @Width = @LargestEventSize + 1
SET @Msg = 'Here is the junk you asked about' + CHAR(13) + '----------------------------'
EXECUTE Master.dbo.xp_sendmail
'YoMama@WhoKnows.com',
@query = @cmd,
@no_header= 'TRUE',
@width = @Width,
@dbuse = 'MyDB',
@subject='none of your darn business',
@message= @Msg
DROP TABLE ##MyTempTbl
The only thing I change to make it fail is the table name, change it from ##MyTempTbl to #MyTempTbl, and it dashes the email hopes of the stored procedure upon the jagged rocks of electronic despair.
Any insight anyone? Or is BOL just full of...well..."stuff"?
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Mar 25, 2015
I can create a temp table like this, and immediately read the data:
declare @NAICSGroups table (NAICS2DigitCode int, NAICSShortTitle varchar(35));
insert into @NAICSGroups (NAICS2DigitCode, NAICSShortTitle)
values
(11,'Agriculture'),
(21,'Mining'),
(22,'Utilities'),
[Code] .....
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Jul 28, 2015
what are some common techniques for ensuring an isolated temp table scope? For example, if 2 different sprocs happen to crud a temp table with the same name? I'm guessing that big SQL shops establish a standard for this early on to avoid conflicts between sprocs.
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Mar 3, 2007
Could anyone describe the pitfalls and best practices with temp tables in SQL Server 2005 for me?Locking, concurrency issues etc
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Oct 5, 2006
Hi!
I have a stored proc that creates a global temp table. How can I have multiple users select records from and insert records in that table without overwriting and/or deleting data?
Thanks so much for your help!
-Parul
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Jul 20, 2005
I have an application that I am working on that uses some small temptables. I am considering moving them to Table Variables - Would thisbe a performance enhancement?Some background information: The system I am working on has numeroustables but for this exercise there are only three that really matter.Claim, Transaction and Parties.A Claim can have 0 or more transactions.A Claim can have 1 or more parties.A Transaction can have 1 or more parties.A party can have 1 or more claim.A party can have 1 or more transactions. Parties are really many tomany back to Claim and transaction tables.I have three stored procsinsertClaiminsertTransactioninsertPartiesFrom an xml point of view the data looks like this<claim><parties><info />insertClaim takes 3 sets of paramters - All the claim levelinformation (as individual parameters), All the parties on a claim (asone xml parameter), All the transactions on a claim(As one xmlparameter with Parties as part of the xml)insertClaim calls insertParties and passes in the parties xml -insertParties returns a recordset of the newly inserted records.insertClaim then uses that table to join the claim to the parties. Itthen calls insertTransaction and passes the transaction xml into thatsproc.insertTransaciton then inserts the transactions in the xml, and alsocalls insertParties, passing in the XML snippet
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Nov 8, 2007
Hi,
A sql server table is populated with records every 2 minutes. See below sample table
In the table, the Import_Date is a datetime field.
create table tblData
(
ID int identity(1, 1),
SourceID int,
SourceCode varchar(255)
Security varchar(255),
Bprice decimal(12, 8),
Aprice decimal(12, 8),
ImportDate datetime
)
Here is a populated table.
I have left gaps for better visual checks for you.
IDSourceIDSourceCodeSecurityBpriceBpriceSizeApriceApriceSizeImportDate
11sourceASecA100.2299.1212007-11-07 16:24:31.297
22sourceWSecH95.789.432007-11-07 16:24:31.297
33SourceXSecS50.56176.4442007-11-07 16:24:31.297
44SourceQSecZ87.982007-11-07 16:24:31.297
55SourceJSecH100.299.1222007-11-07 16:24:31.297
66SourceKSecU2007-11-07 16:24:31.297
77SourceTSecA50.56387.112007-11-07 16:24:31.297
81sourceASecA100.2699.1222007-11-07 16:26:15.123
92sourceWSecH99.54489.432007-11-07 16:26:15.123
103SourceXSecS50.56219.332007-11-07 16:26:15.123
114SourceQSecZ16.9887.982007-11-07 16:26:15.123
125SourceJSecH100.2199.1222007-11-07 16:26:15.123
136SourceKSecU2007-11-07 16:26:15.123
147SourceTSecA50.56287.1112007-11-07 16:26:15.123
151sourceASecA100.2187.1112007-11-07 16:26:15.123
162sourceWSecH99.6689.4322007-11-07 16:26:15.123
173SourceXSecS50.56219.332007-11-07 16:26:15.123
184SourceQSecZ16.98387.9832007-11-07 16:26:15.123
195SourceJSecH100.2399.1232007-11-07 16:26:15.123
206SourceKSecU2007-11-07 16:26:15.123
217SourceTSecA101.32587.1132007-11-07 16:26:15.123
...
I am trying to build a sql query to show which source is offering the max(Bprice) and who is offering the min(Aprice).
In addition if more than one sources are offering the same prices then they should be shown as shown below in the first record i.e. (SourceA, SourceT) --> 3 + 1 = 4
This is what I would like to see:
SecurityMax_BpriceBprice_SizeBprice_SourceCodeMin_ApriceAprice_SizeAprice_SourceCode
SecA101.325SourceT87.114SourceA, SourceT
SecH100.23SourceJ89.432SourceW
SecS50.562SourceX19.33SourceX
SecZ16.983SourceQ87.983SourceQ
What is the sql query to do this please?
This is what I have started with but it is not correct...
select
Security,
max(Bprice) as 'Max_Bprice',
SourceCode as 'Bprice_SourceCode',
min(Aprice) as 'Min_Aprice',
SourceCode as 'Aprice_SourceCode'
from
tblData
group by
Security,
SourceCode
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Nov 18, 2005
I am trying to create a SQL data adapter via the wizard, however, I get
the error "Invalid object name #ords" because the stored procedure uses
a temp table. Anyway around this? Thanks.
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Jun 6, 2015
I am just learning about temp temps using Iteration, how do I clear the contents of the #temp table because when I re-run the query I get the following error:
Msg 2714, Level 16, State 6, Line 6
There is already an object named '#mytemp2' in the database.
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Oct 6, 2006
Hello,I have a Database in a SQL Server 2000 where I have different userstables with equal fields like this:id (int)email (varchar)name (varchar)address (varchar)joinedon (datetime)I want to merge all the tables in one taking rows with the same emailbut taking always the more recent fields based on the 'joinedon' field.So if I have this four different rows:Tbl email name address joinedon--------------------------------------------------------------------------------------------T1 Join Bytes! johnathan NULL 01/01/95T2 Join Bytes! NULL barcelona street 01/01/98T3 Join Bytes! john valencia street 01/01/97T4 Join Bytes! john Q NULL 01/01/99And the final row entered in the new table would beTbl email name address joinedon----------------------------------------------------------------------------------------new Join Bytes! john Q barcelona street 01/01/99I am trying doing his with union statements, but i am not getting thereal merging of data. Any clue?Thanks for your help.
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Apr 6, 2015
I have 2 tables, one is table A which stores Resources Assign to work for a certain period. The structure is as below
Name StartDate EndDate
Tan 2015-04-01 08:30:00.000 2015-04-01 16:30:00.000
Max 2015-04-01 08:30:00.000 2015-04-01 16:30:00.000
Alan 2015-04-01 16:30:00.000 2015-04-02 00:30:00.000
The table B stores the item process time. The structure is as below
Item ProcessStartDate ProcessEndDate
V 2015-04-01 09:30:10.000 2015-04-01 09:34:45.000
Q 2015-04-01 10:39:01.000 2015-04-01 10:41:11.000
W 2015-04-01 11:44:00.000 2015-04-01 11:46:25.000
A 2015-04-01 16:40:10.000 2015-04-01 16:42:45.000
B 2015-04-01 16:43:01.000 2015-04-01 16:45:11.000
C 2015-04-01 16:47:00.000 2015-04-01 16:49:25.000
I need to select the item which process in 2015-04-01 16:40:00 and 2015-04-01 17:30:00. Beside that I need to know how many resource is assigned to process the item in that period of time. I only has the start date is 2015-04-01 16:40:00 and end date is 2015-04-01 17:30:00. How I can select the data from both tables. There is no need for JOIN, just seperate selections.
Another item process time is in 2015-04-01 10:00:00 and 2015-04-04 11:50:59.
The result expected is
Table A
Name StartDate EndDate
Alan 2015-04-01 16:30:00.000 2015-04-02 00:30:00.000
Table B
Item ProcessStartDate ProcessEndDate
A 2015-04-01 16:30:10.000 2015-04-01 16:32:45.000
B 2015-04-01 16:33:01.000 2015-04-01 16:35:11.000
C 2015-04-01 16:37:00.000 2015-04-02 16:39:25.000
Scenario 2 expected result
Table A
Name StartDate EndDate
Tan 2015-04-01 08:30:00.000 2015-04-01 16:30:00.000
Max 2015-04-01 08:30:00.000 2015-04-01 16:30:00.000
Table B
Item ProcessStartDate ProcessEndDate
Q 2015-04-01 10:39:01.000 2015-04-01 10:41:11.000
W 2015-04-01 11:44:00.000 2015-04-01 11:46:25.000
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Feb 22, 2008
I have 3 Checkbox list panels that query the DB for the items. Panel nº 2 and 3 need to know selection on panel nº 1. Panels have multiple item selection. Multiple users may use this at the same time and I wanted to have a full separation between the application and the DB. The ASP.net application always uses Stored Procedures to access the DB. Whats the best course of action? Using a permanent 'temp' table on the SQL server? Accomplish everything on the client side?
[Web application being built on ASP.net 3.5 (IIS7) connected to SQL Server 2005)
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Nov 3, 2004
I have a couple tables that I am exporting data from.
I have one table (call it TABLE1) that contains abbreviations instead of actual words.
For example instead of having the full word "New York City", the column would just contain "NYC".
In another table (call it TABLE2) it has all the abbreviations and the actual words.
So in TABLE2 one column name is FieldName, another Abbreviation and another is Value.
So on a web site, to display that actual name I do something like this
Code:
SELECT CityBoxlabel AS City
FROM TABLE1 INNER JOIN
TABLE 2 AS CityBox ON ISNULL(TABLE1.City, 'NYC') = CityBox.[Value]
WHERE CityBox.FieldName = 'City'
This is working great except that some of these columns contain more than one abbreviation such as "NYC,WDC"
which would stand for "New York City" and "Washington DC"
The items that have more than one abbreviation are not being pulled across because my query is looking for an "NYC,WDC" in TABLE2 to INNER JOIN on but it won't be in there. But "NYC" and "WDC" by themselves are in there.
I tried messing with the INNER JOIN statement by saying something like
TABLE2 AS CityBox ON ISNULL(TABLE1.City, 'NYC') IN CityBox.[Value] INNER JOIN
But it wasn't allowing that.
I can write a program to do this, but I would rather keep it in T-SQL.
Hope this wasn't too confusing!
Any help is greatly appreciated!!
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Feb 6, 2015
I have table1(Client widgets) and Table2(Client Toys) I want to link both Table1 and table2 up to Table3(ClientNames)
All tables have a clientid field
I want to right join them so I get all the client widgets and Client toys for each client...
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Mar 3, 2015
I need to write create table statements for the er diagram that I attached. I am new to sql and I have trouble integrating foreign keys with these bigger er diagrams.
These are the tables I need to create:
Create Table Author(...)
Create Table Writes(...)
Create Table Book(...)
Create Table Copy(...)
Create Table Loan(...)
Create Table Customer(...)
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