Ques:- How to update a resultset programmatically?
Ques:- What are the optional clauses in EJB QL?
Asked In :-
Goavega, Solverminds Solutions Technologies,
Right Answer:
The optional clauses in EJB QL (Enterprise JavaBeans Query Language) are:
1. **ORDER BY** - to specify the order of the results.
2. **GROUP BY** - to group the results based on specified fields.
3. **HAVING** - to filter groups based on a condition.
4. **DISTINCT** - to return unique results.
The optional clauses in EJB QL (Enterprise JavaBeans Query Language) are:
1. **ORDER BY** - to specify the order of the results.
2. **GROUP BY** - to group the results based on specified fields.
3. **HAVING** - to filter groups based on a condition.
4. **DISTINCT** - to return unique results.
Ques:- Why isn't the java.sql.DriverManager class being found?
Asked In :-
Walkover, entrepreneur first,
Ques:- How can I connect to an Excel spreadsheet file using jdbc?
Right Answer:
To connect to an Excel spreadsheet file using JDBC, you can use the following steps:
1. Include the JDBC-ODBC bridge driver or a third-party library like Apache POI or UCanAccess in your project.
2. Use the appropriate connection string for your Excel file format (e.g., `.xls` or `.xlsx`).
For example, using UCanAccess, the connection string would look like this:
```java
String url = "jdbc:ucanaccess://path_to_your_file/your_file.xlsx";
Connection conn = DriverManager.getConnection(url);
```
Make sure to handle exceptions and close the connection properly after use.
To connect to an Excel spreadsheet file using JDBC, you can use the following steps:
1. Include the JDBC-ODBC bridge driver or a third-party library like Apache POI or UCanAccess in your project.
2. Use the appropriate connection string for your Excel file format (e.g., `.xls` or `.xlsx`).
For example, using UCanAccess, the connection string would look like this:
```java
String url = "jdbc:ucanaccess://path_to_your_file/your_file.xlsx";
Connection conn = DriverManager.getConnection(url);
```
Make sure to handle exceptions and close the connection properly after use.
Ques:- Have you created database tables?
Ques:- What is the upgrade path and strategy for the SAP JCo? How will upgrades to the SAP JCo affect my Java application?
Ques:- Does the database server have to be running Java or have Java support in order for my remote JDBC client app to access the database?
Asked In :-
IDP Education, sysvine technologies,
Ques:- What is the duration of the deployment process of SAP JCo?
Ques:- How can a web container know whether cookies are accepted or not accepted by the browser
Asked In :-
Object Frontier Software, proxima,
Ques:- How do I perform browser redirection from a JSP page?
Ques:- What does ResultSet actually contain? Is it the actual data of the result or some links to databases? If it is the actual data then why can't we access it after connection is closed?
Asked In :-
Iris Automation, western digital,
Right Answer:
A ResultSet contains the actual data retrieved from the database query, but it is a temporary object that holds this data in memory. Once the database connection is closed, the ResultSet can no longer access the data because it relies on the connection to fetch and maintain that data.
A ResultSet contains the actual data retrieved from the database query, but it is a temporary object that holds this data in memory. Once the database connection is closed, the ResultSet can no longer access the data because it relies on the connection to fetch and maintain that data.
Ques:- Why do I have to reaccess the database for Array, Blob, and Clob data?
Ques:- What happens if we execute the program?class Return{int display(){try{return 1;}finally{return 2;}}public static void main(String args[]){Return r=new Return();r.display();}}
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