JDBC With Mulitple Databases
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 database
server dies the application should automatically extract data from the
other server.
Is there any JDBC driver available so that it can detect failure in the
main database server and then tries to extract data from the standby
database server?
Kind regards
--
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May 13, 2004
I need to Query tables in 2 databases after getting a connection. I cannot make this piece of code to work. In db2, oracle this type of code works.
Class.forName("com.microsoft.jdbc.sqlserver.SQLServerDriver");
String sys = “jdbc:microsoft:sqlserver://192.168.0.152";
conn = DriverManager.getConnection(sys, "name", "pswd");
Statement stmt = conn.createStatement();
ResultSet rs = stmt.executeQuery("SELECT * FROM pubs.jobs");
rs = stmt.executeQuery("SELECT * FROM mydb.myfile");
If I run this I get invalid object “pubs.jobs” error.
Any ideas?
Thanks.
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Apr 14, 2008
I have read similar posts to this, but I am still having problems.
I am trying to use connection pooling to connect to a local SQL Server 2005 database. I am running my application using
MyEclipse Enterprise Workbench. I have verified that sqljdbc.jar resides in "WebRoot/WEB-INF/lib/"
"WebRoot/WEB-INF/web.xml":
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsichemaLocation="http://java.sun.com/xml/ns/j2ee
http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
<resource-ref>
<res-ref-name>jdbc/DefaultDS</res-ref-name>
<res-type>javax.sql.DataSource</res-type>
<res-auth>Container</res-auth>
</resource-ref>
</web-app>
"WebRoot/META-INFcontext.xml":
<?xml version="1.0" encoding="UTF-8"?>
<Context>
<Resource name="jdbc/DefaultDS"
auth="Container"
type="javax.sql.DataSource"
username="tec"
password="tec"
driverClassName="com.microsoft.sqlserver.jdbc.SQLServerDrive"
url="jdbcqlserver://localhost:1433/tec;databaseName=tec;user=tec;password=test;"
validationQuery="select 1"
maxActive="10"
maxIdle="2"/>
</Context>
Classpath:
<?xml version="1.0" encoding="UTF-8"?>
<classpath>
<classpathentry kind="src" path="src"/>
<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER"/>
<classpathentry kind="con" path="com.genuitec.eclipse.j2eedt.core.J2EE14_CONTAINER"/>
<classpathentry kind="lib" path="WebRoot/WEB-INF/lib/dom.jar"/>
<classpathentry kind="lib" path="WebRoot/WEB-INF/lib/jaxen-full.jar"/>
<classpathentry kind="lib" path="WebRoot/WEB-INF/lib/jaxp-api.jar"/>
<classpathentry kind="lib" path="WebRoot/WEB-INF/lib/jdbc2_0-stdext.jar"/>
<classpathentry kind="lib" path="WebRoot/WEB-INF/lib/sqljdbc.jar"/>
<classpathentry kind="lib" path="WebRoot/WEB-INF/lib/jstl.jar"/>
<classpathentry kind="lib" path="WebRoot/WEB-INF/lib/mail.jar"/>
<classpathentry kind="lib" path="WebRoot/WEB-INF/lib/sax.jar"/>
<classpathentry kind="lib" path="WebRoot/WEB-INF/lib/saxpath.jar"/>
<classpathentry kind="lib" path="WebRoot/WEB-INF/lib/standard.jar"/>
<classpathentry kind="lib" path="WebRoot/WEB-INF/lib/xalan.jar"/>
<classpathentry kind="lib" path="WebRoot/WEB-INF/lib/xercesImpl.jar"/>
<classpathentry kind="output" path="WebRoot/WEB-INF/classes"/>
</classpath>
Code to connect:
import java.io.Serializable;
import java.sql.*;
import javax.sql.*;
import javax.naming.*;
public int testConnect(){
Connection conn = null;
InitialContext ctx = null;
java.sql.Statement stmt = null;
try {
ctx = new InitialContext();
Context envCtx = (Context) ctx.lookup("java:comp/env");
DataSource ds = (DataSource) envCtx.lookup("jdbc/DefaultDS");/*This is generating the Cannot load JDBC driver class... error*/
conn = ds.getConnection();
stmt = conn.createStatement();
return CONSTANT.SUCCESS;
} catch (Exception e) {
return CONSTANT.FAILURE;
}finally {
try {
if (stmt != null)
stmt.close();
if (conn != null)
conn.close();
if (ctx != null)
ctx.close();
} catch (Exception ex) {
// do nothing
return CONSTANT.FAILURE;
}
}
}
Any ideas would be greatly appreciated.
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Aug 8, 2006
Hi all,
We've just stumbled on a 1.0 version incompatibility with the JDBC specs.
Problem: A table with SMALLINT column. According to JDBC specs version 3.0
(p.B-179) and 4.0 (p.221)), the value should be converted to Integer type.
Unfortunatelly we get a Short object :(
Now, I remember, this case was also affecting old JSQLConnect driver from
DataDirect. Could that problem sneak to new MS driver too?
Please let me know any resolution to this problem if exists.
The issue has not been fixed in CTP 1.1 version. Any ideas if it can be fixed??
Cheers,
Piotr
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Mar 12, 2008
I've got an import app written in Java. One table I'm importing from contains 22 million records. When I run the app in a 2000 environment, I have my max heap set at 512, and the table gets imported. When I run in a 2005 environment, I have to change the max heap to 1152 or it will error out with a similiar error:
com.microsoft.sqlserver.jdbc.SQLServerException: The system is out of memory. Use server side cursors for large result sets:Java heap space. Result set size:854,269,999. JVM total memory size:1,065,484,288. (<--this is with max heap at 1024)
what is the difference between the 2000 and 2005 JDBC that I have to set max heap in one and not the other?
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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
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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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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
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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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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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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Jan 24, 2006
I just restored my SQL server 2000 database on the SQL server 2005. after this i ran the Service broker sample ("Hello World") on this database by changing the AdventureWorks name to the new database name. The "setup.sql" runs fine. When i run the "SendMessage.sql" i was not getting any rows in the output (The message was not getting inserted into the queue). I checked the Service broker is enabled on this databased using the query "select is_broker_enabled from sys.databases where name = 'newdbname' " It was 1. I even tried the ALTER DATABASE SET ENABLE_BROKER. but it didnt work.
When i tried the sample on a newly created database it worked fine.
Is there any solution to make the restored database to work for service broker.
Thanks
Prashanth
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Nov 26, 2001
Are there separate jdbc drivers for Sql Server 7 or should I use the 2000 drivers?
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Aug 6, 2001
Is anyone out there using Unix/Java/Sun app server to connect to SQL Server via JDBC? If so, what drivers are you using? We are currently testing with WebLogic's BEA JDBC driver. Does anyone have any feedback on it?
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Feb 6, 2004
Is oracle and Microsoft JDBC drivers are same? Oracle 9i comes with JDBC, can I use the same driver to access the Microsoft SQL Server?
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Jun 1, 2004
Hi
I just downloaded the Microsoft JDBC Driver for SQL Server 2000. Now it tells me SQL Server 7 is not supported. :o I already checked the JDBC Driver list on suns site. Its quite long and only states MS SQL Server without any version number. Can you recommend a particular driver? Preferrably without any cost. :D
Or am I better of with the jdbc/odbc bridge?
Thanks
Shabassa
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May 21, 2008
Hi
I have a java program which uses sql.It supports sql 2000 and 2005.The user can enter a command from which he can choose to what server type he wants to connect.It is something like :
" c:connect [jdbc driver for 2005] [server] "
Now i have to do some different operations when user connects to 2000 and other operations when user connects to 2005.
The problem is that when using jdbc driver for 2005 he can also connect to mssql server 2000.
How can i find out to what server type he is connecting to?
i hope i explained it clearly enough
thanks
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Dec 7, 2004
Hi,
Does SQL Server Express ship with a JDBC driver? ... Hardly so, but is it available somewhere?
Rgds and thanks, PP
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Mar 8, 2006
Hi guys,
Where can I download the JDBC Driver for our MS SQL Server 7 ?
Thank you.
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