Mulitple Joins And Nulls
May 8, 2007
I am trying to join two tables on multiple fields. But the nulls aren't considered a match so they aren't included in the results set.
Select A.Lot, A.Block, A.Plan, B.Key
from A join B on
A.Lot=B.Lot
A.Block=B.Block
A.Plan=B.Plan
In the data, there can be an instance where Block is null in both tables so it "matches" but not in SQL. How do I get the "matched" nulls to be returned as well?
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May 16, 2006
When i do a select on my emplee table for rows with null idCompany i dont get any records
I then try to modify the table to not allow a null idCompany and i get this error message:
'Employee (aMgmt)' table
- Unable to modify table.
Cannot insert the value NULL into column 'idCompany', table 'D2.aMgmt.Tmp_Employee'; column does not allow nulls. INSERT fails.
The statement has been terminated.
This sux
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Feb 17, 2008
is there an elegant way to use one equals sign in a where clause that returns true when both arguments are null, and returns true when neither is null but both are equal and returns false when only one is null?
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May 15, 2008
I have two SSIS packages that import from the same flat file into the same SQL 2005 table. I have one flat file connection (to a comma delimited file) and one OLE DB connection (to a SQL 2005 Database). Both packages use these same two Connection Managers. The SQL table allows NULL values for all fields. The flat file has "empty values" (i.e., ,"", ) for certain columns.
The first package uses the Data Flow Task with the "Keep nulls" property of the OLE DB Destination Editor unchecked. The columns in the source and destination are identically named thus the mapping is automatically assigned and is mapped based on ordinal position (which is equivalent to the mapping using Bulk Insert). When this task is executed no null values are inserted into the SQL table for the "empty values" from the flat file. Empty string values are inserted instead of NULL.
The second package uses the Bulk Insert Task with the "KeepNulls" property for the task (shown in the Properties pane when the task in selected in the Control Flow window) set to "False". When the task is executed NULL values are inserted into the SQL table for the "empty values" from the flat file.
So using the Data Flow Task " " (i.e., blank) is inserted. Using the Bulk Insert Task NULL is inserted (i.e., nothing is inserted, the field is skipped, the value for the record is omitted).
I want to have the exact same behavior on my data in the Bulk Insert Task as I do with the Data Flow Task.
Using the Bulk Insert Task, what must I do to have the Empty String values inserted into the SQL table where there is an "empty value" in the flat file? Why & how does this occur automatically in the Data Flow Task?
From a SQL Profile Trace comparison of the two methods I do not see where the syntax of the insert command nor the statements for the preceeding captured steps has dictated this change in the behavior of the inserted "" value for the recordset. Please help me understand what is going on here and how to accomplish this using the Bulk Insert Task.
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Nov 3, 2000
We find that a delete command on a table where the rows to be deleted involve an inner join between the table and a view formed with an outer join sometimes works, sometimes gives error 625.
If the delete is recoded to use the join key word instead of the = sign
then it alway gives error 4425.
625 21 0 Could not retrieve row from logical page %S_PGID by RID because the entry in the offset table (%d) for that RID (%d) is less than or equal to 0. 1033
4425 16 0 Cannot specify outer join operators in a query containing joined tables. View '%.*ls' contains outer join operators.
The delete with a correleted sub query instead of a join works.
Error 4425 text would imply that joins with view formed by outer joins should be avoided.
Any ideas on the principles involved here.
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Nov 3, 2006
Okay I wanted to get this to work right so I am wondering what I am doing wrong here.
"SELECT COUNT(A.Status) AS TOTAL FROM tts_tickets A,tts_reporters B WHERE A.Ref_Reporter_ID="123"AND A.Status=1"
I need to count the status options but only where from table b is the ID equal to the ID in question.
How do I do this?
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Feb 17, 2004
I Have three tables
TASK
taskid, taskname, projectid, workid
1,,1,1
2,,1,2
3,,2,3
PROJECT
projectid, projectname
1, project1
2, project2
3, project3
WORK
workid, workname
1,work1
2,work2
3,work3
I need to do an update this way
Update the taskname as 'projectname' + '_' + 'workname' for any projectid.
projectname and workname coming from the projectid and workid in the task record
so the task table becomes
1,project1_work1,1,1
2,project1_work2,1,2
3,project2_work3,2,3
I can get all the records doing this
SELECT p.projectname+ ' ' + w.workname AS 'NEWNAME'
FROM task t
JOIN work w
ON t.workid = w.workid
JOIN project p
ON t.projectid = p.projectid
WHERE projectid = 2
how do i do an UPDATE?
any help is appreciated
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Jul 23, 2005
Hello,I need to do a seach in multiple columns for a certain word. With SQLI have to use one specific column right?I.E. select * from DB where Column1 like '%search%'That works.But what if I want to seach multiple columns in the table for thesearch word?You can't do this:select * from DB where Column1, Column2, Column3 like '%search%'Is there a way to do this?Thanks,Tmuld.
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Jul 20, 2005
Dear all,Our application needs a bit of database redundancy.Our application only accesses database for reading purposes.We want to have two databases in separate machines. Incase one databaseserver dies the application should automatically extract data from theother server.Is there any JDBC driver available so that it can detect failure in themain database server and then tries to extract data from the standbydatabase server?Kind regards--Posted via http://dbforums.com
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Jul 20, 2005
I have a single .asp page that opens a connection and then sequentiallyopens and closes 14 recordsets from stored procedures to obtain variousproduct information before closing the connection.Is it common practice to do something like this? Or is opening 14recordsets going to become a real problem when the page goes live and startsgetting high web traffic?Thank you in advance for any information you might provide.Dave
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Oct 31, 2007
I need to update information for a user and if the user is classified
as a primary (@blnPrimary) then I need to update information for all
users within his agency (AgencyUniqueId). The issue is that the second
UPDATE to "cdds_User_Profile" always returns a rowcount of 0 (should be
1) even though the values for "@Original_AgencyUniqueId" and
"@Original_UserId" are correct. This is just a snippet of the whole
procedure. I'm trying to implement similar logic in other parts of the
procedure and I'm observing the same behavior there as well. Any help
anyone can provide is greatly appreciated. </p><pre>/*** Update User Profile ***/UPDATE [cdds_User_Profile] SET [FirstName] = @FirstName, [LastName] = @LastName, [Title] = @Title, [Phone] = @Phone, [AcctType] = @AcctType, [AcctStatus] = @AcctStatus, [LastUpdatedDate] = GETDATE() WHERE ([FirstName] = @Original_FirstName AND [LastName] = @Original_LastName AND [Title]=@Original_Title AND [Phone]=@Original_Phone AND [AcctType]=@Original_AcctType AND [AcctStatus]= @Original_AcctStatus AND [AgencyUniqueId] = @Original_AgencyUniqueIdAND [UserId] = @Original_UserId);IF @@ROWCOUNT = 0BEGINSET @err_message = 'Data has been edited by another user since you began viewing this information.'RAISERROR (@err_message,11, 1)ROLLBACK TRANSACTIONRETURNEND IF @@ERROR <> 0 BEGINROLLBACK TRANSACTIONRETURN ENDIF @blnPrimary = 1 BEGIN IF LOWER(@AcctStatus) <> LOWER(@AgencyAcctStatus)/*** Update Users Acct. Status ***//* update all users in same agency profile */UPDATE [cdds_User_Profile] SET [AcctStatus] = @AcctStatus,[LastUpdatedDate] = GETDATE() WHERE ([AgencyUniqueId] = @Original_AgencyUniqueIdAND [UserId] = @Original_UserId); IF @@ROWCOUNT = 0BEGINSET @err_message = 'Data for this agency has been edited by another user since you began viewing this information.'RAISERROR (@err_message,11, 1)ROLLBACK TRANSACTIONRETURNENDIF @@ERROR <> 0 BEGINROLLBACK TRANSACTIONRETURN ENDEND</pre><pre>
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Jun 12, 2001
Hi!
Can anybody help me in solving this problem
SCRIPT
declare @var1 varchar(10)
set @var1 = '1,4,9,10'
select @var1
select TGNO, TGNAME from carriers where TGNO in (@var1)
RESULT
----------
1,4,9,10
(1 row(s) affected)
Server: Msg 245, Level 16, State 1, Line 4
Syntax error converting the varchar value '1,4,9,10' to a column of data type smallint.
I want to pass a list of values to a column of DATA Type smallint.
Thanks in advance.
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Jun 13, 2001
What is the way to pass the values throug varibale as shown below?
SCRIPT
declare @var1 varchar(10)
set @var1 = '1,4,9,10'
select @var1
select TGNO, TGNAME from carriers where TGNO in (@var1)
RESULT
----------
1,4,9,10
(1 row(s) affected)
Server: Msg 245, Level 16, State 1, Line 4
Syntax error converting the varchar value '1,4,9,10' to a column of data type smallint.
I want to pass a list of values to a column of DATA Type smallint.
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Aug 14, 2007
Hey everyone,
I am beggining in SQL and the .NET framework and have been running into some problems trying to design a relational database. I am completely new to it so I bought a book that was recommended in this Forum called "Handbook of Relational Database Design" and it has been pretty usefull so far. RIght now I am trying to make the Logical Data Model before I make the Relational Data Model.
The problem that I am having right now is creating a table that is a derivation from another table. For example, in the book they have a table called Property, and then two other tables called MountainProperty and BeachProperty. MountainProperty and BeachProperty are a type (relationship here) of a property. So basically Property will hold some data in a table, and then MountainProperty and BeachProperty will extend that property to contain more specific data. This is very similar to what I want to do. However I am having a problem understanding how an instance (or row) in Property, will have a link (foreign key) to a piece of data that is in Mountain or BeachProperty. I understand the foreign key in Mountain and BeachProperty and how they will link back to their "parent". But how will Property know its children, where is the link for that, how can one make a link to that. You could make a column with a foreign key, but which table would it point to, can one column point to mulitple tables? That doesn't make very much sense to me.
Basically what I am trying to say is that a row in the Property table can be multiple types, and these types will store more additional data about that row. How can I link to that data from that row in the Table Property.
I am terribly sorry if this is confusing or if it is so appartently easy for you, but this is the first time that I have ever tried to make a relational database and I am really struggling on seeing how to organize these tables properly. Thank yor for your time.
Jeremy
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Nov 13, 2007
Hi all,
Is it possible to generate mulitple reports from parameter? what I want is for example: I have a report with a sales orders table, it has 2 input parameter fields; two dates to make up a date range. If the date range is between yesterday and today, I will get two reports (two reports with two different total page number); one is for yesterday and one is for today.
I did some research on resetting the total page, but their solution doesnt work on my special case (very complicate..). A similiar work out also apperciate.
Regards,
Bryan
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Apr 16, 2008
I have a DLL that acts as an interface between the application and the database. So you create a new instance to the database via:
MyDatabaseClass db = new MyDatabaseClass()
Each instance of the class creates a new connection to the database.
So if I were to have the following, then 4 connections would be made.
MyDatabaseClass db1 = new MyDatabaseClass()
MyDatabaseClass db2 = new MyDatabaseClass()
MyDatabaseClass db3 = new MyDatabaseClass()
MyDatabaseClass db4 = new MyDatabaseClass()
My question is...What if instead of creating new connections upon each instantiation, I re-use the same connection through a "ConnectionManager" class. In this way, the above code will only create 1 connection instead of 4.
What do you guys think about each approach? Obviously the 2nd approach makes sense for non-web applications, but what about websites? Would that just cause that single connection to be overloaded??
Thanks for any insights.
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Jul 20, 2005
I have several ResultSet Querys/Statements within my page. An exampleof the code looks like this:ResultSet rs1 = stmt1.executeQuery("SELECT right('' + '$' + convert(varchar,SUM(ActivePrim),1), 15) AS 'ActivePrim',right(' ' + '$' + convert(varchar,SUM(KGAP),1), 15) AS'KGAP', right(' ' + '$' +convert(varchar,SUM(PrimaryRepo),1), 15) AS 'PrimaryRepo', right('' + '$' + convert(varchar,SUM(WeeklyTotal),1), 15) AS'WeeklyTotal' FROM Intranet..InsuranceStats WHERE EmployeeName ='Jamie' and Date BETWEEN '01/01/04' and '01/31/04'");What would be the correct way to retrieve each result set? Icurrently have it as the example below. But this doesn't allow foreach result set to be displayed separately.<td valign=top><b>Active Primary:</b><%= ActivePrim %></td>Any help would be greatly appreciated.Catherine
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Aug 13, 2007
How to assign multiple values to emp1 variable separated by comma
Ex: If ajay karthik vijay are employee names in emp table
then emp1= ajay,karthik, vijay
set emp1= (select employeename from emp) returns error
error: subquery returns morethan one value
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Jun 6, 2002
We shall be taking a bunch of 7.0 instances and moving/upgrading to a SQL 2000 cluster server. I was thinking of creating new named instances on the 2000 cluster and upgrading each 7.0 server to it's respective named instance. Also thought of using the 2000 copy database wizard; I was told this didn't always work. Anyone hear of problems with this?
Thanks
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Jan 19, 2006
I'm sure there is probably a very easy solution that I am just not seeing or can't Google...
I have a DataFlow that includes a column of Delimited values (i.e. Value1,Value2,etc..). As this DataFlow is populating a parent table, I need split the values into their own dataflow and populate a child table. I've tried a script transformation and couldn't figure out how to accept 1 delimited input row and output multiple rows after a split. Any ideas?
TIA,
Matthew
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Oct 8, 2007
Has any figured out a work around to having multiple reports in a single email sent out by a data driven sub in SSRS 2005?
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Aug 11, 2005
SQL Server 2000Howdy All.Is it going to be faster to join several tables together and thenselect what I need from the set or is it more efficient to select onlythose columns I need in each of the tables and then join them together?The joins are all Integer primary keys and the tables are all about thesame.I need the fastest most efficient method to extract the data as thisquery is one of the most used in the system.Thanks,Craig
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Dec 11, 2007
hello,
I have several tables that have guids as their primary keys and the tables are related as follows:
Table1 - primary key = ServiceNo (Guid), Filter Key = CampaignNo
Table2 - primary key = CostBasisNo (Guid), Foreign Key = ServiceNo (from Table1)
Table3 - primary key = UserId, Foreign Key = ServiceNo (from table1)
Table4 - primary key = SourceServiceNo (Foreign Key from Table1), MemberServiceNo(Foreign Key from Table1)
what I need to do is copy all records from Table1 where CampaignNo = @CampaignNo and insert them into table1, this I can do easily but I will generate a new ServiceNo for each one and associated a new CampaigNo which is fine.
The problem comes in that I need to also copy the contents of Table2 = Table3 for all ServiceNos that have been copied from Table1 but insert the new Guid that will have been created when copying the rows in Table1
This is further compounded when I need to do the same to Table4 but this time I need to insert the newid's for SourceServiceNo and the related MemberServiceNo which all would have changed.
I haven't the first clue where to start with this task, do I need to use temporary tables, cursors? any help gratefully received, even if it's a pointer to the most efficient approach.
regards
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Dec 18, 2007
Hi,
I'm fairly new to the SSIS world, and I've recently ported a bunch of dts packages over to SSIS. I'm an ASP.NET developer so I'm very familiar with the capabilities that configuration files give you, and I attempted to set up my solution as follows:
All of my "Data Sources" are at the project level, and added (with the same name) to each package. I wanted to have a single config file that had all of the project-level settings (i.e. connection strings, data file paths, etc). I then have a config for each package with the package level settings - i.e. variables, etc.
The problem becomes that all packages do not use all data sources. This results in an error when I try to open up a package for editing, it complains that it doesn't have a reference to data source XYZ that it is seeing in the configuration file.
Is there any way that I can get around this? If I have a password to a database change, I don't want to have to look through every config file and change it in multiple places.
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Mar 7, 2008
Hi,
I am getting deadlock on activated procedure which I am using to receive message from the Service Broker Queue.
Deadlock details:
Two threads are tring to do delete on internal table queue_messages_122847900 ends up in a dead lock.
Activated procedure code
RECEIVE TOP(1) @xmlMessage = message_body,
@handle = conversation_handle,
@message_type = message_type_name
FROM TransactionQueue;
IF (@message_type = 'http://schemas.microsoft.com/SQL/ServiceBroker/EndDialog')
BEGIN
END CONVERSATION @handle;
RETURN 0
END
.........................
.........................
After this I do process the message and some other processing
And then
END CONVERSATION @handle;
Note I do have single conversation group
Is their a problem in the way I am receiving and processing messages. Is it possible because of the delay between RECEIVE and END CONVERSATION same message is read by two different threads.
Thanks
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Oct 12, 1999
Hi,
Why is it that SQL joins (*=) run a little faster as opposed to ANSI joins(LEFT JOIN...)? Aren't they supposed to be almost identical?
The issue is this: we are promoting using ANSI syntax for the obvious reason (future versions of SQL Server may not support SQL Server syntax; portability, etc.)
However, the problem is the speed. What have others done about this? Do you use ANSI syntax or SQL syntax? HOw true is it that future SQL Server versions may discontinue support for the '*=" and "=*' join operators.
Angel
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Feb 29, 2008
I have four tables which I want to return results for an advanced search function, the tables contain different data, but can be quite easily joined,
Table A Contains a Main Image, this image is displayed in the results
Table B Contains an Icon, this image is displayed in the results
Table C doesn't have an image in it but has a child table with a number of images associated to the table, in the UNION ALL statement I would Like to do a Join to get say the top Image from this child and print it for the row associated with table C.
Select title, description, image from tableA
UNION ALL
Select title, description, icon as image from tableB
UNION ALL
title, description, ( inner Join SELECT top(1)
from imageTableC where imagetableC.FK = tableC.PK)
as image from tableC
Could someone show me the syntax to do this, I have all the information printing to the screen, bar this table C image.
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Sep 1, 2005
Hi All,
Im having a problem with a statement i cannot seem to get 2 left joins working at the same time 1 works fine but when i try the second join i get this error:-
Microsoft OLE DB Provider for ODBC Drivers error '80040e14'
[Microsoft][ODBC Microsoft Access Driver] Syntax error (missing operator) in query expression 'children_tutorial.school_id=schools.idx LEFT JOIN regions ON children_tutorial.region_id=region.idx'.
My SQL statment is as follows :-
SELECT children_tutorial.*,schools.schoolname,regions.rname FROM children_tutorial LEFT JOIN schools ON children_tutorial.school_id=schools.idx LEFT JOIN regions ON children_tutorial.region_id=region.idx
I am using an Access database i have tried all sorts to get it working and its driving me mad!! any help would be really appreciated.
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Sep 16, 2004
Do NULLs take up space on the Database? I mean is room allocated for them?
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Apr 5, 2004
Can someone tell me what to do if several NULLS are showing up within tables. Is there an easy step to locate all NULLS and delete them within the table?
Can someone provide detailed infromation on how to delete NULLS within tables. I'm new o the SQL side so I hope I have explained what it is that I'm looking to do. Our in house programmer said that the NULLS maybe causing a problem with the software communicating with the SQL Server software.
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Apr 12, 2008
I have a page with 100 numeric fields. SQL insert crashes lest there is a number in every field. Any way around this?
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Feb 9, 2007
Hi
i have a table t1 and wish to have to fk's now i want to be able to set it up so that only one of them can be null example:
t1
id___________fk1________fk2
1____________6__________NULL
2____________NULL_______3
3____________7__________NULL
4____________NULL_______NULL <<<<<<< This should not be allowed
thanks
james
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May 21, 2007
Hi i am new to SQL, and i have a data base thats got NULLS in it
is there a query i can run, which can take the NULL value out ?
anything will be greatly appreciated.
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