Is is possible to open a connection to a database with exclusive mode with JDBC?

JDBC Interview Questions and Answers

(Continued from previous question...)

Is is possible to open a connection to a database with exclusive mode with JDBC?

I think you mean "lock a table in exclusive mode". You cannot open a connection with exclusive mode. Depending on your database engine, you can lock tables or rows in exclusive mode.
In Oracle you would create a statement st and run
st.execute("lock table mytable in exclusive mode");
Then when you are finished with the table, execute the commit to unlock the table. Mysql, informix and SQLServer all have a slightly different syntax for this function, so you'll have to change it depending on your database. But they can all be done with execute().

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Other Interview Questions

• What is JDBC?
• What's the JDBC 3.0 API?
• Does the JDBC-ODBC Bridge support the new features in the JDBC 3.0 API?
• Can the JDBC-ODBC Bridge be used with applets?
• How do I start debugging problems related to the JDBC API?
• What is new in JDBC 2.0?
• How to move the cursor in scrollable resultsets?(new feature in JDBC 2.0)
• How to update a resultset programmatically? (new feature in JDBC 2.0)
• How can I use the JDBC API to access a desktop database like Microsoft Access over the network?
• Are there any ODBC drivers that do not work with the JDBC-ODBC Bridge?
• What causes the "No suitable driver" error?
• Why isn't the java.sql.DriverManager class being found?
• How to insert and delete a row programmatically? (new feature in JDBC 2.0)
• What are the two major components of JDBC?
• What is JDBC Driver interface?
• How do I retrieve a whole row of data at once, instead of calling an individual ResultSet.getXXX method for each column?
• What are the common tasks of JDBC?
• Why does the ODBC driver manager return 'Data source name not found and no default driver specified Vendor: 0'
• How to use JDBC to connect Microsoft Access?
• What are four types of JDBC driver?
• Which type of JDBC driver is the fastest one?
• Are all the required JDBC drivers to establish connectivity to my database part of the JDK?
• Is the JDBC-ODBC Bridge multi-threaded?
• Does the JDBC-ODBC Bridge support multiple concurrent open statements per connection?
• What is the query used to display all tables names in SQL Server (Query analyzer)?
• Why can't I invoke the ResultSet methods afterLast and beforeFirst when the method next works?
• How can I retrieve a String or other object type without creating a new object each time?
• How many types of JDBC Drivers are present and what are they?
• What is the fastest type of JDBC driver?
• There is a method getColumnCount in the JDBC API. Is there a similar method to find the number of rows in a result set?
• I would like to download the JDBC-ODBC Bridge for the Java 2 SDK, Standard Edition (formerly JDK 1.2). I'm a beginner with the JDBC API, and I would like to start with the Bridge. How do I do it?
• If I use the JDBC API, do I have to use ODBC underneath?
• Once I have the Java 2 SDK, Standard Edition, from Sun, what else do I need to connect to a database?
• How do I insert a .jpg into a mySQL data base?
• What is the best way to generate a universally unique object ID? Do I need to use an external resource like a file or database, or can I do it all in memory?
• Whan happens when I close a Connection application obtained from a connection Pool? How does a connection pool maintain the Connections that I had closed through the application?
• How can I know when I reach the last record in a table, since JDBC doesn't provide an EOF method?
• Where can I find info, frameworks and example source for writing a JDBC driver?
• How can I create a custom RowSetMetaData object from scratch?
• How does a custom RowSetReader get called from a CachedRowSet?
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• How can I instantiate and load a new CachedRowSet object from a non-JDBC source?
• Can I set up a conection pool with multiple user IDs? The single ID we are forced to use causes probelems when debugging the DBMS.
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• What driver should I use for scalable Oracle JDBC applications?
• Can you scroll a result set returned from a stored procedure?...
• How do I write Greek ( or other non-ASCII/8859-1 ) characters to a database?
• How can I insert images into a Mysql database?
• Is is possible to open a connection to a database with exclusive mode with JDBC?
• What are the standard isolation levels defined by JDBC?
• Update fails without blank padding. Alhough a particular row is present in the database for a given key, executeUpdate() shows 0 rows updated and, in fact, the table is not updated. If I pad the Key with spaces for the column length (eg if the key column is 20 characters long, and key is msgID, length 6, I pad it with 14 spaces), the update then works!!! Is there any solution to this problem without padding?
• What isolation level is used by the DBMS when inserting, updating and selecting rows from a database?
• How can I determine the isolation levels supported by my DBMS?
• Connecting to a database through the Proxy I want to connect to remote database using a program that is running in the local network behind the proxy. Is that possible?
• How do I receive a ResultSet from a stored procedure?
• How can I write to the log used by DriverManager and JDBC drivers?
• How can I get or redirect the log used by DriverManager and JDBC drivers?
• What does it mean to "materialize" data?
• Why do I have to reaccess the database for Array, Blob, and Clob data?
• What is an SQL Locator?
• How do I set properties for a JDBC driver and where are the properties stored?
• What is the JDBC syntax for using a literal or variable in a standard Statement?
• How do I check in my code whether a maximum limit of database connections have been reached?
• DB2 Universal claims to support JDBC 2.0, But I can only get JDBC 1.0 functionality. What can I do?
• Many connections from an Oracle8i pooled connection returns statement closed. I am using import oracle.jdbc.pool.* with thin driver. If I test with many simultaneous connections, I get an SQLException that the statement is closed.
• How can I overwrite blob data in an Oracle database? ...
• How do I disallow NULL values in a table?
• ) How to get a field's value with ResultSet.getxxx when it is a NULL? I have tried to execute a typical SQL statement: select * from T-name where (clause); But an error gets thrown because there are some NULL fields in the table.
• How do I insert/update records with some of the columns having NULL value?
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• I have an application that queries a database and retreives the results into a JTable ...
• How does one get column names for rows returned in a ResultSet?
• What are the considerations for deciding on transaction boundaries?
• What is the JDBC syntax for using a date literal or variable in a standard Statement?
• How can I determine where a given table is referenced via foreign keys?
• How can I get information about foreign keys used in a table?
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• What is DML?
• What is the significance of DataBaseMetaData.tableIndexStatistics? How to obtain and use it?
• What types of DataSource objects are specified in the Optional Package?
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• How do I execute stored procedures?
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• How do I extract a BLOB from a database?
• How do I extract the SQL statements required to move all tables and views from an existing database to another database?
• How do I check what table types exist in a database?
• What is the advantage of using a PreparedStatement?
• How do I find all database stored procedures in a database?
• How can I investigate the physical structure of a database?
• How does the Java Database Connectivity (JDBC) work?
• What is Metadata and why should I use it?
• How do I create a database connection?