Question

I am using java java.sql.* for querying from SQLite DB. I found a starnge issue where I write a sqlString as:

SELECT n.Name as Name, 
       c.Value as Value0, 
       d.Value as Value1 
FROM  (Table1 c inner join Table2 n on c.NameID = n.ID),
      Table3 d 
WHERE c.RunID = 1 
      and d.RunID = 2 
      and c.NameID = d.NameID

The statement stmt.executeQuery(sqlQuery) throws the following exception:

java.sql.SQLException: no such column: n.Name
at org.sqlite.DB.throwex(DB.java:288)
at org.sqlite.NativeDB.prepare(Native Method)
at org.sqlite.DB.prepare(DB.java:114)
at org.sqlite.Stmt.executeQuery(Stmt.java:89).............

Name is already part of the Table2 table. The same statement is working fine from SQLite command prompt. But when I remove the open brackets and try to execute from java, there is no problem. Any idea why this happens so?

Answer 1

Try something like this, use sub resultset

SELECT rs1.Name AS NAME, 
       rs1.Value0 AS Value0, 
       d.Value AS Value1 
FROM  (SELECT n.Name AS NAME, 
       c.Value AS Value0, 
       d.Value AS Value1 
       FROM Table1 c INNER JOIN Table2 n ON c.NameID = n.ID) rs1,
      Table3 d 
WHERE c.RunID = 1 
      AND d.RunID = 2 
      AND c.NameID = d.NameID