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how to execute complex queries

 
Sivaraman Lakshmanan
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hai all,
I am writing an application where I am using JDBC to connect to access database. I am using the DSN to connect to the Database.
I use the method createStatement() to create a statement object thro which I get a resultset by passing a query to the executeQuery() method.
Whenever I give a simple query everything works fine but when I give a complex query like the one below I just get a error.
The Error that I get is
java.sql.SQLException: [Microsoft][ODBC Microsoft Access Driver] Too few parameters. Expected 1.
at sun.jdbc.odbc.JdbcOdbc.createSQLException(JdbcOdbc.java:6106)
at sun.jdbc.odbc.JdbcOdbc.standardError(JdbcOdbc.java:6263)
---- rest ignored ---
SELECT DISTINCTROW Orders.ShipName, Orders.ShipAddress, Orders.ShipCity, Orders.ShipRegion, Orders.ShipPostalCode, Orders.ShipCountry, Orders.CustomerID, Customers.CompanyName, Customers.Address, Customers.City, Customers.Region, Customers.PostalCode, Customers.Country, [FirstName] & " " & [LastName] AS Salesperson, Orders.OrderID, Orders.OrderDate, Orders.RequiredDate, Orders.ShippedDate, Shippers.CompanyName, [Order Details].ProductID, Products.ProductName, [Order Details].UnitPrice, [Order Details].Quantity, [Order Details].Discount, CCur([Order Details].[UnitPrice]*[Quantity]*(1-[Discount])/100)*100 AS ExtendedPrice, Orders.Freight
FROM Shippers INNER JOIN (Products INNER JOIN ((Employees INNER JOIN (Customers INNER JOIN Orders ON Customers.CustomerID = Orders.CustomerID) ON Employees.EmployeeID = Orders.EmployeeID) INNER JOIN [Order Details] ON Orders.OrderID = [Order Details].OrderID) ON Products.ProductID = [Order Details].ProductID) ON Shippers.ShipperID = Orders.ShipVia;
The how to execute the complex queries like the one above in java. Even my application hangs when I give a cartesion query.
please help...
thanking you,
L.Sivaraman.
 
Joe Ess
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First thing I'd try is to run the query in Access to see if the query syntax is correct.
 
Sarath Mohan
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I feel the error is due to passing invalid number of parameters to the SQL querry. Please check the query directly thru MS-Access database interface.
I suggest it's better to use PreparedStatement instead of simple Statement when we need to execute Complex queries.
 
Mani Ram
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As Joe mentioned, try the query in Access and see if it works.
Or another problem might be with the quotes ("). Try escaping the quotes.
I have got these sort of errors, because of missing quotes.
 
Jamie Robertson
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Usually this error message occurs if you spell a column or table name wrong in your query. Cut and paste it into the Access SQL editor to execute, it'll give you an error message that actually might make sense. Good old Microsoft!
Jamie
 
Sivaraman Lakshmanan
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hai all,
As u said i tried this query in MSAccess. it work fine. but only when i send this query to my app, an exception is thrown
help me pl
thanks
sivaraman.
 
Sainudheen Mydeen
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Hi Sivaraman
Originally posted by Sivaraman Lakshmanan:

[FirstName] & " " & [LastName] AS Salesperson,
L.Sivaraman.

Most likely & " " & is causing the exception. It will not work when you say


You may try this

-Sainudheen
 
Jamie Robertson
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I hope you don't include the semi-colon at the end of your sql statement in your java sql string?
String sql = "SELECT DISTINCTROW Orders.... ON Shippers.ShipperID = Orders.ShipVia;"; //the inner semi-colon would be bad!!
Jamie
 
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