Question

is it possible to query Excel and Access databases in one single query?

Asked by: nubee

Hello,

I have 2 different databases one in excel and one in Access and both have a common field called Name in Access and Host in Excel through which we can link them together.

I want to have a query some think like this.

public class Simple_Search {
            private Connection connA;
private Connection connE;
            Statement stA;
            ResultSet rsA;

            private String dbDriver="sun.jdbc.odbc.JdbcOdbcDriver";

            public Simple_Search() throws ClassNotFoundException, SQLException{
             Class.forName(dbDriver);
             connA=DriverManager.getConnection("jdbc:odbc:Accessdb","", "");
                                 connE=DriverManager.getConnection("jdbc:odbc:Exceldb","","");
            }
try {
   st=conn.createStatement(); ******WHICH CONNECTION SHOULD I USE******
  rs=st.executeQuery("select make, model from AccessTable where ExcelTable.Host = AccessTable.Name and ExcelTable.Switch = "sfhds" ");

Is it possible to accomplish this? Is there any othert alternative?

please help,
thanks,
aruna

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Asked On
2005-02-14 at 09:12:37ID21314019
Tags

excel

,

query

,

accesstable

Topic

Java Programming Language

Participating Experts
1
Points
75
Comments
6

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Answers

 

by: CEHJPosted on 2005-02-14 at 09:14:10ID: 13306027

I don't think so. I think you'll have to link them in code

 

by: nubeePosted on 2005-02-14 at 09:27:36ID: 13306198

I tried doing some thing like this..

public Simple_SearchExcel() throws ClassNotFoundException, SQLException{
                   Class.forName(dbDriver);
      conn=DriverManager.getConnection("jdbc:odbc:Accessdb","", "");
      cone=DriverManager.getConnection("jdbc:odbc:Exceldb","", "");

            }
*******QUERY EXCEL FOR SWITCH*******
try {
      ste=cone.createStatement();
rse=ste.executeQuery("Select Distinct HOST from [Sheet1$] where SWITCH = '"+request.getParameter("Switch_txt")+"'");

while(rs.next()) {
       Switch_txt = rs.getString(1);
        Switch_vec.add(Switch_txt);
***SUPPOSE vector has a, b, c, d, e etc *******
        }

********AND NOW QUERYING ACCESS**********
I want to check if ANY OF THE vector value is equal to Name of Access table then output result.
for eg there is a match for a,b,c of vector in Access table then 3 different rows of data with model, make should be returned.

Is it again posible thru SQL?
select model, make from AccessTabel where Name = Switch_vec

does this what you mean by linking in code?

 

by: nubeePosted on 2005-02-14 at 09:37:34ID: 13306293

I actually want to to run access query  once for each row that the Excel query returns(stored in vector).
Can you please tell me how I can do that?

Thanks a lot,
aruna

 

by: CEHJPosted on 2005-02-14 at 10:17:47ID: 13306668

>>does this what you mean by linking in code?

Yes. I think it may be possible to create a temporary table in Access from the Excel data then do a join, but that wouldn't be a whole lot easier than what you're doing really.

"select model, make from AccessTabel where Name " + getSetQueryFragment(yourVector);



static String getSetQueryFragment(Vector v) {
      StringBuffer sb = new StringBuffer("in (");
      for(int i = 0;i < v.size() - 1;i++) {
            sb.append("'").append((String)v.get(i)).append("'").append(",");
      }
      sb.deleteCharAt(sb.length() - 1);
      return sb.append(")").toString();
}


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