Queries From Multiple Databases On The Same Server
Feb 13, 2008
I have a situation where I need to do some reporting for simular asset records but the data is listed on different database from the same server.
I was curious as to the way to write the queries that I will need.
Lets say I have 3 databases and I am looking for a asset of some type and the ID is a serial number.
The serial will be on the main table from each database. Is there a way I can set a relation from a view between these records?
I.E.:
1: Database A -DSNA_tblMaiin - Serialnumber
2: Database B -DSNB_tblMaiin - Serialnumber
3: Database C -DSNC_tblMaiin - Serialnumber
I believe that this is a dot notation question.
Thanks in advance,
Gene
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Feb 27, 2014
I am using Server 2012 and very new to SQL. I have a request from a physician for a list of his patients that meet a criteria. This is stored in a temp table names #cohort.
Using this cohort he wants each row to be one patient with a list of labs, vitals, etc. Three items are the most recent lab value and date. I could query each lab individually and place it into a temp table and then join all temp tables at the end, but I am trying to move past that and have all labs in one temp table. All temp tables are joined with PatientSID.
I tried to do something for just 2 labs, but it is not working. There could be nulls values when joined with the #cohort table.
Individually the SELECT statements pull in the most recent lab value and date, but I cannot get them into a temp table with one row of PatientSID and then the lab value and date if they exist.
IF OBJECT_ID ('TEMPDB..#lab') IS NOT NULL DROP TABLE #lab
SELECT
cohort.PatientSID
,SubQuery1.LabChemResultNumericValueAS 'A1c%'
,SubQuery1.LabChemCompleteDateTimeAS 'A1c% Date'
,SubQuery2.LabChemResultNumericValueAS 'LDL'
[Code] .....
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May 14, 2014
I have the following:
(a) One Dynamic SQL Query that takes 37 ms when run as a single query or in an SP.
(b) Three SQL Indexed View queries that take 0 ms when run together.
When i add (a) + (b) in the same SP, i should get 37 ms + 0 ms = 37ms, but NO it takes 400 ms.
What is causing the extra 363 ms of latency.
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Sep 16, 2015
Our developers have gotten this idea lately that instead of having many small stored procedures that do one thing and have small parameter lists that SQL can optimize query plans for, its better to put like 8-10 different queries in the same stored procedure.
They tend to look like this:
create procedure UberProc (@QueryId varchar(50))
as
if @QueryId = 'First Horrible Idea'
begin
select stuff from something
end
if @queryid = 'Second really bad idea'
begin
select otherstuff from somethingelse
end
I see the following problems with this practice:
1) SQL can't cache the query plan appropriately
2) They are harder to debug
3) They use these same sorts of things for not just gets, but also updates, with lots of optional NULLable parameters that are not properly handled to avoid parameter sniffing.
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Jan 23, 2008
I need to create a stored procedure that will have about 10-15 queries and take 3 parameters.
the variables will be: @lastmonth, @curryear and @id
@lastmonth should inherit Session variable intlastmonth
@curryear should inherit Session variable intCurrYear
@id should inherit Session id
One example query is SELECT hours FROM table WHERE MONTH ='" + Session("intLastmonth") + "' AND YEAR ='" + Session("intCurrYear") + "' AND [NUMBER] = '" + Session("id")
The rest of the queries will be similar and use all 3 variables as well.
How can I go about this and how will queries be seperated.
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Jan 29, 2001
We are in the design phase of a project where it is estimated there will be 150 SQL Server databases - each one housing similar information on each of 150 client sites. The client needs a reporting tool to analyze and make comparisons across databases. We were thinking about a using a data warehouse. Does SQL Server have a native solution to this type of problem ? Or is there another, better way to approach this ?
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Nov 9, 2004
Hi please could someone give me a explination of how SQLserver deals with multiple databases, We have multiple website that are all run from the same server all from SQLserver. Now we have a couple of databases which are very busy and have a lot of people constantly accessing them and then we have quite a few with much less traffic.
How would these databases effect each other? Would the busy database, mean that the many small databases will all be slowed dramtically?
Everything is okay at the moment but we are considering putting another fairly large database on the server and am worried about it having a sever effect on the smaller databases. Cheers Ed
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Oct 9, 2006
Hi,
I have to manage many SQL Server databases on several servers. How can I manage the jobs, backups and the space on the disc without going to each and every server and database and job? Is there any script to run this? It will be very helpful if you can provide me the sample script or point me to any web site where I can get the info/script for this. Thanks in advance...
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Dec 10, 2007
Dear Readers,Is it possible, like in Access, to link to tables in other SQL databases that are on the same server? I have a query that I originally had in Access that queered from multiply databases. It did this by having those other tables in the other databases linked to the database that had the query.
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May 10, 2005
I am using SQL Server 2000.
I am working on a project where there will be multiple databases on a single instance of SQL Server. Each database will have the exact same schema but will be accessed by different groups of users.
What is the easiest way to sychronize changes between the databases, so that if I add a column to one database, it will be reflected in the other databases. If I add, remove, or alter a stored procedure, I want the change to be made in the other databases. I want the data in each database to remain isolated. In other words, I do not want replication of the data, only the schema of the databases. I would like to have a single "master" database that I use to make any schema changes and all the other databases be schema mirrors of this database each with their own data.
I have looked into SQL Server replication, but this didn't seem to work the way I wanted and I wasn't able to publish column changes etc.
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Jul 21, 2005
hy all..How can I achieve the above ?Moreover can I retrieve data from multiple databases which are lying on different DBMSs ( like retrieving from database A which is on SQL and from database B which is on Oracle ) ?Rgds.
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Apr 25, 2008
HI Guys,
I just need to add multiple catalogs to the same linked server, in Sql Server 2000 or Sql Server 2005. Here i need only to add 3 databases in to a single linked server name.
Thanks In Advance,
Krishna
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Feb 9, 2015
I have migrated over 700 databases to another server and now I have to add a specific user to all these databases and sync , looking for script to add this user at once to all these databases.
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Aug 28, 2015
I need a script that will return the mdf & ldf for multiple databases.
I am currently running...
sp_helpdb 'TestDataname'
...and copying the size of the mdf and ldf into an excel spreadsheet.
How can I get the mdf AND ldf file size for all of the databases in an instance? I need the MDF and LDF seperated and I want the actual size of the file as it appears on the file system.
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Feb 23, 2007
Greetings.
I have a setup/deployment question regarding SQL Server Encryption.
Internal database encrypts data in 3 different tables. This could execute on any one of 6 different servers.
The tables with encrypted data are replicated to another database on different servers (3)
How should the keys/certificates be created so that the data in the replicated database can be decrypted?
In my test scenario so far, I have been unable to have the second database decrypt the data that was encrypted on the first database (currently on the same server).
-- Create Database Master Key
CREATE MASTER KEY ENCRYPTION BY
PASSWORD = 'p@ssw0rd'
GO
-- Create Certificate
CREATE CERTIFICATE MyCertificate
WITH SUBJECT = 'My Data Encryption Certificate',
EXPIRY_DATE = '10/31/2010';
GO
CREATE SYMMETRIC KEY MyKey
WITH
ALGORITHM = AES_256,
IDENTITY_VALUE = 'My Symmetric Key',
KEY_SOURCE = 'Unique phrase that will be used to secure the key'
ENCRYPTION BY CERTIFICATE MyCertificate;
GO
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May 4, 2007
What is the best approach to handle this situation? I have three different databases, which has it's own stored procedure. I need to call them all at page load and piece together the data. The common demoninator is the date.
2007
JAN
FEB
MAR
APR
row 1
50
60
89
63
row 2
44
21
62
46
2006
JAN
FEB
MAR
APR
row 1
60
90
65
41
row2
984
650
452
762
Row 1 and Row 2 come from two different databases and stored procedures.
How can I query the data and present it as it's shown above?
Thank you!
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Sep 21, 2006
Hello,
I have a problem. I suspect a certain user in my company is using the SA account to log into Databases and run queries(query analyzer) to gather information this user is not suppose to view. The problem I have is this is an IT person so they know the SA password. How can I log specific or all queries run against all databases/tables/fields to find out exactly what this person is doing/seeing? Or if there is an alternative to find out this information?
Please advise?
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May 15, 2015
We have multiple databases on a single instance in an OLTP environment. I have my data files on a separate SAN LUN from my transaction log files (and a few NDFs split out onto additional LUNs). I was wondering if there is a performance benefit to putting each LDF file on its own LUN? Or at least my few busiest LDFs?
We are currently on 2012, but I'm having to put together specs for a 2014 installation and need to answer this question without having an environment in which I can benchmark different setups. I just want to hear whether or not others have done this (why or why not?).
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Oct 21, 2015
I have a requirement to delete all the orphans users for the databases. The issue I am having is with when database principal owns a schema in the DB, User cannt be dropped.
How do I transfer it to DBO in case I am looping multiple databases. This is what I got so far .
declare @is_read_only nvarchar (200)
Select @is_read_only = is_read_only from master.sys.databases where name='test' /* This should be a parameter value */
IF @IS_READ_ONLY= 0
BEGIN
Declare @SQL as varchar (200)
[Code] .....
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Jul 24, 2015
I'm trying to create an email report which gives a result of multiple results from multiple databases in a table format bt I'm trying to find out if there is a simple format I can use.Here is what I've done so far but I'm having troble getting into html and also with the database column:
EXEC msdb.dbo.sp_send_dbmail
@subject
= 'Job Summary',
@profile_name =
'SQL SMTP',
[code]....
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Sep 13, 2007
Hi,
I'm trying to create a database that takes specific information from a number of databases on different servers to make some reporting that we have much easier.
I'm pretty new to SQL so I'm not sure of the best way to proceed. I read an article that suggested I use the OPENROWSET command. The problem is, the version of SQL that came with one of the programmes we use is limited and will not allow you to turn on the allow "Ad Hoc distributed Queries" so the SLQ statement will not execute.
I'm confused why it won't let me to connect through ODBC as I've created a web page that selects data from this database with no problems!
Here is the SQL statement that I've written to make sure it is the correct one (on the msdn library page it said that this was the ODBC connection):
SELECT a.*
FROM OPENROWSET('MSDASQL','DRIVER=(SQL Server);SERVER=APPOLOACT7;UID=sa;PWD=***************',
'SELECT * FROM MDCTestAndDev.dbo.TBL_CONTACT') AS a
I've also created the ODBC connection using the tool on Administration Tools>Data Sources ODBC
Any help would be greatly appreciated (also any ways of selecting from one database and inserting it into another will be helpfull)
Thanks
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Nov 15, 2006
Hi!
I have 7 source databases and one target database, all using the same structure. The structure is made of 10 tables, with foreign key constraints.
I need to merge the source databases into the target (which won't have any data before that process, but will already have the correct schema), and to keep the relationships between the records.
I know how to iterate over the source databases (with SMO foreach), but I'd like to know if someone can advise the best copy method for that context in SSIS ? (I don't want to keep the primary keys, but I need to keep the relationships...)
Any pointer most welcome!
best regards and thanks
Thibaut
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May 20, 2015
I have 2 DBs located on separate Sql Servers but the DBs are linked. I am querying data from both DBs but want to combine the results. Here is my query but it doesn't seem to be working.
(SELECT DISTINCT
idname, name, address, address2, awardedtoname, suppno
FROM contract INNER JOIN
house ON contract.idname = house.idname)
JOIN
(SELECT DISTINCT
tpd.PropertyNumber AS [Property No], tpd.Address1 + ' , ' + tpd.Address2 AS Estate, tpd.Address1 AS Address1,
[Code] ....
How I could combine the results?
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Aug 10, 2007
Hello,
I am new in SSIS.
I am using an OLEDB source and setted as SQL Command.
The Query is a JOIN between different databases.
How can I make the QUERY with different source (different databases or SQL Servers)?
I mean, any solution is OK, the important is to make queries against different databases with SSIS.
Thank
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Aug 14, 2012
I am trying to restore multiple .bak backup SQL database files onto a new server. However, I have found that it will not allow me to restore multiple databases at once. Is there a way to do this so that I do not have to manually upload one at a time? I tried adding all the .bak files at once to the backup device window but it only did the first one listed. It would be so much easier to restore them all at once so that I do not have to continue this manual process. I am restoring them via device.
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May 23, 2008
Hello,
I am in the progress of designing a new section of my database and was thinking of creating a hole new database instead of just creating tables inside the database. My question is can you JOIN multiple tables in an SQL Statement from multiple databases. Ie, In the Management program I have a database called 'Convention' and another one called 'Services', inside the two databases there are many tables. Can I link say tblRegister from Convention to tblUser in Services?
Thanks
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Nov 15, 2007
Hi
I have two queries, one which takes 1 second to execute and the other which takes less that a second to execute.
I need to join them up similar to the following but when I do it take forever for them to execute.
select *
from table
where column not in (select column from table2)
It is quite complex and I have a couple of views included in the queries but it executes quickly on my dev database and when I run it on the live one it takes forever. Granted there is alot more data on the live database but the individual queries only take a second to run.
Does anyone know why there would be such a time increase whenever I join the queries and run them on my live database?
Any help would be appreciated.
Thanks,
Frankie
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Aug 11, 2004
*************************************************************
<code> tags added by moderator. Please use <code> and
</code> tags to bracket comments to make code readable.
*************************************************************
I am a beginner to this whole .net thing so my code is probablly scary, but anyway, I am looking for a way to insert records into a database and then get the last ID. I am sure there is a much better way to do this, but here is the code that I have that ins't quite working:
'SQL Insert data'
Dim Conn As SqlConnection
Dim Rdr As SqlDataReader
Dim strConn As String = AppSettings("doConnect")
Dim strSQL As String = "INSERT INTO USERS (username, password, accountNum) VALUES ('" + Email.Text.Trim() + "', '" + password.Text.Trim() + "', '" + Session("accountNum").Trim() + "')"
Conn = New SqlConnection(strConn)
Dim Cmd As New SqlCommand(strSQL, Conn)
Conn.Open()
Cmd.ExecuteNonQuery()
'SQL Get Last ID
Dim ConnGet As SqlConnection
Dim RdrGet As SqlDataReader
Dim strConnGet As String = AppSettings("doConnect")
Dim strSQLGet As String = "select MAX(id) as maxid from USERS"
ConnGet = New SqlConnection(strConn)
Dim CmdGet As New SqlCommand(strSQL, Conn)
ConnGet.Open()
If CmdGet.ExecuteScalar() <> 0 Then
RdrGet = CmdGet.ExecuteReader()
While RdrGet.Read()
Session("theID") = RdrGet("name")
End While
Else
Session("theID") = 0
End If
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Jul 23, 2001
Does anyone know how to count multiple columns in a SQL Query from One table and return numbers I can use the following but don't know how to join the two statements to one.
SELECT COUNT(*) AS [NUMBER OF SERVERS]
FROM DBO.OS
WHERE (OSTYPE LIKE '%SER%')
The other statement is
SELECT COUNT(*) AS [NUMBER OF WORKSTATIONS]
FROM DBO.OS
WHERE (CAPTION LIKE '%9%') OR (CAPTION LIKE '%PRO%') OR (CAPTION LIKE '%ME%')
If any one has any idea's please reply or email me directly. I would greatly appreciate it.
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Jul 23, 2005
I'm writing an ASP page for a project and it requires multiple queries.However, I'm trying to combine multiple SELECT statements, but can'tfigure out a way that actually works.Basically, here are the SELECT statements I want to combine:SELECT * FROM schoolrequest WHERE SLid=10SELECT SLlastName FROM academicofficeWHERE schoolrequest.SLsendToId=academicoffice.AOidSELECT SLlastName FROM academicofficeWHERE schoolrequest.SLbillToId=academicoffice.AOidSELECT SLlastName FROM academicofficeWHERE schoolrequest.SLrequestorId=academicoffice.AOidSELECT * FROM diaryentry WHERE diaryentry.DEkeyValue=10AND diaryentry.DEdeletedDate IS NULLThe academicoffice table just contains basic contact info, but needs tobe used 3 times in the query to get specific contact info for 3different contacts(SLsendToId, SLbillToId, SLrequestorId)The diaryentry table contains info entered in by students. TheDEkeyValue is actually the primary id of the schoolrequest table(SLid).Any ideas?Thanks,M
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Jul 18, 2007
Hello everyone...
I have created a report that pulls data from 5 different tables. I have created a tableadapter for this. I have a sql stored procedure with left joins that I am trying to use but keep getting key violations and not null value violations when I try to use it. I have tried setting the NULLValue to NOT throw exception but that has not helped. I have also tried to writing a query for each table. I can add each query to my tableadapter but I can use them all at the same time for some reason. Can this be done? When I go to my report and try to add fields to it from the tableadapter, I only see the results of one query. I am only trying to SELECT. I am not doing any updates or deletes to the tables on the SQL Server.
Any advice would be greatly appreciated.
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Mar 3, 2008
I get a wo_ID and want to query company data. I have the following tables, work_orders (has wo_ID, wo_name and install_id), install_ids (has install_id, comp_id) and customers (comp_id, company_name). The query process goes like this: I get a wo_ID and I need to find the install_id that corresponds with that wo_ID in that same work_orders table. Then take that install_id and find out the comp_id that corresponds with that install_id from the install_ids table. Finally take that customer_id and link it to comp_id in the customers table to find out company data. I need to join it multiple times to get my final data. I have a simple one that works right now with one join and using the install_id, but I don't know how to expand it with multiple joins. Thanks.
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Apr 14, 2008
I hit a bit of a road block on a project I have been working on. If anyone has a suggestion or a solution for how to combine my queries that use IFELSE that would be a huge help. I noted my query below./* will remove for aspx page use */USE Database/* these params are on the page in drop down boxes*/DECLARE @ProductID int;DECLARE @BuildID int;DECLARE @StatusID int;/* static params for this sample */SET @ProductID = -1;SET @BuildID = -2SET @StatusID = -3/*the query that will build the datagrid. currently this runs and produces three different result sets.How do I combine these statements so they produce a single set of results? */IF (@ProductID = -1) SELECT * FROM tblTestLog ELSE (SELECT * FROM tblTestLog WHERE (ProductID = @ProductID))IF (@BuildID = -2) SELECT * FROM tblTestLog ELSE (SELECT * FROM tblTestLog WHERE (BuildID = @BuildID))IF (@StatusID = -3) SELECT * FROM tblTestLog ELSE (SELECT * FROM tblTestLog WHERE (AnalystStatusID = @StatusID))
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