Query « Connection « Java Database Q&A





1. JDBC Query excecution    stackoverflow.com

I am facing an issue while executing queries.I use the same resultSet and statement for excecuting all the queries.Now I face an intermittent SQlException saying that connection is already closed.Now we ...

2. How do I go about creating and then connecting to and querying a database in Java?    stackoverflow.com

I've recently started my first programming job, and what I need to do as my main project is to create a program for simulating diesel generator behaviour. I'm creating this program using ...

3. Java: Connect to Database and return query result    stackoverflow.com

I am trying to connect to a SQL Server database in Java, execute a query, and return the result to the calling script. class DB ...

4. How to use JDBC 2.1 in Java to connect to LDAP    stackoverflow.com

I downloaded JDBC 2.1 and added jdbcLdap.jar as well as ldap.jar in my class path ( http://sourceforge.net/projects/myvd/files/jdbc%20ldap%20bridge/jdbc%20ldap%20bridge%202.1/jdbc-ldap-2.1.zip/download ). I would like to use it in my java application to ...

5. JDBC Connection Configuration Queries    jmeter.512774.n5.nabble.com

Hi 2. Validation query - This is normally used in pooling systems to check if the connection maintained in the pool is still valid. Say you have a pool of 5 connections and the database is restarted , the connections would not be valid anymore. The Pool implementation could periodically fire a query (the validation query), which would fail, and these ...

6. JDBC connection query    coderanch.com

7. JDBC connection query    coderanch.com

9. Query about Connection Object    coderanch.com

Hello!! I want to know about closing the connection. How to create, use and close the connection object and what impact this open connectin object can have on the application??? I came across this piece of code. //DataSource ds PrepareStatement putStmt = ds.getConnection().prepareStatement("INSERT INTO TABLE_A( COL1, COL2, COL3) VALUES (?,?,?)"); I want to know what will happen to this connection object ...





10. Query Regarding Connection    coderanch.com

11. Query on Connection interface    coderanch.com

While writing database programs we use interfaces such as Connection, Statement etc. But our class does not implement these interfaces. Why is it so??? For example: class xyz { Connection con = DriverManger.getConnection(); Statement stmt = con.createStatement() ..... } Here our class does not implement Connection as well as Statement interfaces It will be very helpfull if someone gives us the ...

12. Single connection with parallel queries    coderanch.com

I always thought of a connection (i.e. a TCP socket channel opened with a couple {login,password} to the database server) as allowing parallel queries (i.e. queries launched by parallel threads in the same process), since a good "connection" paradigm is one that allows to reduce the redundancy of connection infos in the client program. But I experienced that with Oracle [9.2.0.1.0] ...

13. Some Query related to Connection Pooling    coderanch.com

i m using mysql driver on tomcat webserver and using JNDI based connectionpooling. and i made a connection succesfully. i have made a connection accordingly as given in tomcat documentation on Connection pooling. i have a number of querys 1. In the initial context , why we write string "java:/comp/env" what its significance ? Does it point to particular location in ...

14. Some Query related to connection pooling    coderanch.com

i m using mysql driver on tomcat webserver and using JNDI based connectionpooling. and i made a connection succesfully. i have made a connection accordingly as given in tomcat documentation on Connection pooling. i have a number of querys 1. In the initial context , why we write string "java:/comp/env" what its significance ? Does it point to particular location in ...

15. Query regarding Connection pooling    coderanch.com

Firstly, I have lot of Queries. so any one can answer any query will be helpful. I think java ranch is best forum to get answer related java queries. So I call upon all java geeks to clarify my doubts regarding this. i m using mysql driver on tomcat webserver and using JNDI based connectionpooling. and i made a connection succesfully. ...

16. jdbc connection and query execution    coderanch.com

i am trying to connect to a database and execute a query. it is falling out when it gets ready to execute the query, but i am not sure if it is something that i am doing with my connections prior to that. i have the system DSN set up in the ODBC data source administrator, so that database is there. ...





17. Query regarditng Connection Pooling    coderanch.com

No. You have to return the connection to the pool, by calling it's close(). Also for other ConnectionPool implementations. The mechanism is: You ask a connection from the pool. You use the connection to perform one or more sql activities You return the connection to the pool by closing the connection. Regards, Jan

19. JDBC Connection Isolation level query    coderanch.com