Java updating resultset updating windows xp professional
The first thing we need for our Java UPDATE example is a sample My SQL database table.
To keep it simple — but also show several different data types — I've created the following My SQL database table: create table users ( id int unsigned auto_increment not null, first_name varchar(32) not null, last_name varchar(32) not null, date_created timestamp default now(), is_admin boolean, num_points int, primary key (id) ); -- insert some sample records insert into users (first_name, last_name) values ('Fred', 'Flinstone'); insert into users (first_name, last_name) values ('Barney', 'Rubble'); A few of these fields are a little contrived, but I wanted to show several different data types in one table, so this is what I came up with.
A default Result Set object is not updatable and has a cursor that moves forward only.
Thus, you can iterate through it only once and only from the first row to the last row.
Copy and past the following example in JDBCExample.java, compile and run as follows − java JDBCExample Connecting to database... ID: 100, Age: 38, First: Zara, Last: Ali ID: 101, Age: 45, First: Mahnaz, Last: Fatma ID: 102, Age: 55, First: Zaid, Last: Khan ID: 103, Age: 50, First: Sumit, Last: Mittal Inserting a new record... ID: 100, Age: 38, First: Zara, Last: Ali ID: 101, Age: 45, First: Mahnaz, Last: Fatma ID: 102, Age: 55, First: Zaid, Last: Khan ID: 103, Age: 50, First: Sumit, Last: Mittal ID: 104, Age: 40, First: John, Last: Paul List the record before deleting...
ID: 101, Age: 45, First: Mahnaz, Last: Fatma List result set after deleting one records...
When a getter method is called with a string and more than one column has the same alias or name as the string, the value of the first matching column is returned.
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