Question

i’m doing a project where i need to retrieve data from one field of access and display it on JTextField and its serial no.select fieldname from tablename
but it’l select all rows.also how to retrieve data(whole row) with random serial number

Answer 1

For the query to select the field data,

SELECT fieldName FROM tableName WHERE columnName = 'columnValue';

Here, columnName should be something like the primary key and columnValue will be a unique value (like a serial number). Then it will return the field data associated with the row with the specific columnValue.

For setting it into the JTextField,

if(resultSet.first()) {
    jTextField.setText(resultSet.getString(0));
}

Here, resultSet should return only one value (with the query specified above).

As for your other question, if your serials are irregular, get all the serials from the table:

SELECT serials FROM yourTable;

And then add them to a Collection (like a Vector). Then write an algorithm to generate a random index and retrieve the data from the Collection with that index (vector.elementAt([yourIndex])).

Then again query the table in the database for the row associated with that serial:

SELECT FROM yourTable WHERE serialNo = 'theValueYouGot';

…and you’ll get the relevant row.