How do I get a list of column names in ResultSet?
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How do I get a list of column names in ResultSet?
You can get the name of a particular column using the getColumnName() method of the ResultSetMetadata interface. This method accepts an integer value representing the index of a column and returns a String value representing the name of the specified column.
How do you store ResultSet data in ArrayList?
Just iterate on your ResultSet and add all elements to your ArrayList….
- Okay I think I got it.
- @AdemÖkmen Create an object with properties for the information, create an object for a row in the ResultSet , and add it to the list.
How do I get all the ResultSet rows?
Getting the number of rows using methods The last() method of the ResultSet interface moves the cursor to the last row of the ResultSet and, the getRow() method returns the index/position of the current row.
Which method is used to retrieve the ResultSet created?
The ResultSet interface declares getter methods (for example, getBoolean and getLong ) for retrieving column values from the current row. You can retrieve values using either the index number of the column or the alias or name of the column. The column index is usually more efficient.
How can I fetch the values from database using column name in a JDBC program?
How to retrieve particular columns of a table using JDBC program?
- Connect to the database.
- Create a Statement object.
- Execute the Statement using the executeQuery() method. To this method, pass the select query in the String format. To retrieve all the values, we use the following query:
How do you know if a ResultSet has a column?
Use the ResultSetMetaData class. The query or stored procedure being executed should have known results. The columns of the query should be known.
How do I add a list to a database?
The INSERT command first takes a comma separated list of column names enclosed in parentheses. This is followed by the VALUES keyword and then a comma separated list of values for each column. Note that the values must be listed in the same order as the column names.
How do you add an ArrayList to a database?
public class AnotherClass{ public void someMethod(){ //create list of models objects e.g. get them from user interface ArrayList models=new ArrayList<>(); for(int i=0;i<3;i++){ Model model=new Model(); model. setId(i); model. setAttr(“attr”+i); models. add(model); } SomeOtherClass obj=new SomeOtherClass(); obj.
What is Rs getString?
String s = rs. getString(“COF_NAME”); The method getString is invoked on the ResultSet object rs , so getString will retrieve (get) the value stored in the column COF_NAME in the current row of rs .
Which method returns a ResultSet object?
Information about the columns in a ResultSet is available by calling the method ResultSet. getMetaData . The ResultSetMetaData object returned gives the number, types, and properties of its ResultSet object’s columns.
What is ResultSet interface?
ResultSet interface represents the result set of a database query. A ResultSet object maintains a cursor that points to the current row in the result set. The term “result set” refers to the row and column data contained in a ResultSet object.
What are the different types of ResultSet?
There are two types of result sets namely, forward only and, bidirectional. Forward only ResultSet: The ResultSet object whose cursor moves only in one direction is known as forward only ResultSet. By default, JDBC result sets are forward-only result sets.
