crud java

Solutions on MaxInterview for crud java by the best coders in the world

showing results for - "crud java"
Ariana
02 Jan 2021
1String sql = "SELECT * FROM Users";
2 
3Statement statement = conn.createStatement();
4ResultSet result = statement.executeQuery(sql);
5 
6int count = 0;
7 
8while (result.next()){
9    String name = result.getString(2);
10    String pass = result.getString(3);
11    String fullname = result.getString("fullname");
12    String email = result.getString("email");
13 
14    String output = "User #%d: %s - %s - %s - %s";
15    System.out.println(String.format(output, ++count, name, pass, fullname, email));
16}
17
Clara
18 Jun 2019
1String sql = "DELETE FROM Users WHERE username=?";
2 
3PreparedStatement statement = conn.prepareStatement(sql);
4statement.setString(1, "bill");
5 
6int rowsDeleted = statement.executeUpdate();
7if (rowsDeleted > 0) {
8    System.out.println("A user was deleted successfully!");
9}
10
Alonso
01 Jun 2020
1String sql = "UPDATE Users SET password=?, fullname=?, email=? WHERE username=?";
2 
3PreparedStatement statement = conn.prepareStatement(sql);
4statement.setString(1, "123456789");
5statement.setString(2, "William Henry Bill Gates");
6statement.setString(3, "bill.gates@microsoft.com");
7statement.setString(4, "bill");
8 
9int rowsUpdated = statement.executeUpdate();
10if (rowsUpdated > 0) {
11    System.out.println("An existing user was updated successfully!");
12}
13
David
25 Aug 2017
1String sql = "INSERT INTO Users (username, password, fullname, email) VALUES (?, ?, ?, ?)";
2 
3PreparedStatement statement = conn.prepareStatement(sql);
4statement.setString(1, "bill");
5statement.setString(2, "secretpass");
6statement.setString(3, "Bill Gates");
7statement.setString(4, "bill.gates@microsoft.com");
8 
9int rowsInserted = statement.executeUpdate();
10if (rowsInserted > 0) {
11    System.out.println("A new user was inserted successfully!");
12}
13
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