Inserting rows in a database table using JDBC

Question

Hi,
I am trying to insert a row in a table using the follwing code:
String Query_String = "Insert into Table_Name (Field_1, Field_2, Field_3)" +
"Values (Value_1, Value_2, Value_3)";
stmt.executeUpdate (Query_String);
Field_1 is a Date field, Field_2 is a String, and Field_3 is an integer.
Any of the fields could be null. If the user does not enter a value for any
one of these fields what would be the values for
Value_1, Value_2, or Value3 in the Query_String?
Thanks.

Answer 1

Hi,
I am trying to insert a row in a table using the
follwing code:
String Query_String = "Insert into Table_Name
(Field_1, Field_2, Field_3)" +
"Values (Value_1,
"Values (Value_1, Value_2, Value_3)";
stmt.executeUpdate (Query_String);
Field_1 is a Date field, Field_2 is a String, and
Field_3 is an integer.
Any of the fields could be null. If the user does not
enter a value for any
one of these fields what would be the values for
Value_1, Value_2, or Value3 in the Query_String?
Thanks.Keep in mind that each database server probably has their own way of storing date values. For now, I'm going to assume that you're going to be using MySQL.
// Initialize variables to null
String Value_1 = "";
String Value_2 = "";
String Value_3 = "";
try
// Get Date
Date date = new Date();
SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");
Value_1 = dateFormat.format(date);
// Get String value
Value_2 = "some string";
// Get Integer value
Value_3 = String.valueOf("2");
String query = INSERT INTO T_NAME VALUES('" + Value_1 +"', '" + Value_2 + "', '" + Value_3 + "');
int iUpdated = stmt.executeUpdate(query);
catch(Exception e)
// Catch Code
System.out.println("Number of records updated: " + iUpdated);
This will just enter empty string values if the strings are empty.
Is this what you wanted to know?
If not, provide a bit more information and I'll try to help as best as I can