Making SQL Query dynamic

Question

hi ,
I want to write a method that will take column-name and value to be searched parameters
somehting like this
void somemethodname(String colName , String tableName , String[] arr )
i will read all the parameters value from XML file
colName , tableName , arr
WHERE string array will contain fields on which you want to use your WHERE clause
SELECT EVENT_TYPE_ID from Register WHERE EVENT_TYPE = 'event_type_id' "
Now in this query my column-name id EVENT_TYPE_ID
whose value i want to find out
basically i dont want to hardcode anything
can somebody help me in doing this.
Please post code if you have
thanks in advance
Nilesh

Answer 1

This may give you some ideas. There is a lot more that needs to be done, such as check if value is numeric, string, date, etc. and put them in the sql accordingly.
import java.util.*;
class Test {
     public static void main(String[] args)  {
          String[][] s = {{"VAL1", "VAL1"}, {"VAL2", "VAL2"}};
          Test t = new Test();
          t.sql("column", "table", s, "VAL1");
     public void sql (String colName, String tableName, String[][] where, String orderBy) {
          StringBuffer sql = new StringBuffer();
          sql.append("Select ").append(colName)
               .append(" From ").append(tableName)
               .append(" Where ");
          for (int x=0; x<where.length; x++) {
               sql.append(where[x][0]).append(" = '").append(where[x][1]).append("'");
               if (x<where.length-1)
                    sql.append(" And ");
          if (orderBy != null)
               sql.append(" Order By ").append(orderBy);
          System.out.println(sql.toString());
}Hope this helps!
DesQuite