Using JOINS in EJB 3 preview

i have tried several combinations from EJB spec and I cannot get any JOIN working:
Below is a class:
@Entity
@Table(name="LINEITEM")
@NamedQuery(name="findLineItemByProductAndOrder",
          queryString="SELECT l FROM LineItem as l INNER JOIN l.product as p WHERE p.sku = :productId AND l.orderId = :orderId")
public class LineItem implements Serializable {
     private Integer orderId;
     private Integer quantity;
     private Integer total;
     private Product product;
     @Id
     @Column(name="ORDER_ID", primaryKey=true)
     public Integer getOrderId() {
          return orderId;
     public void setOrderId(Integer orderId) {
          this.orderId = orderId;
     @Id
     @ManyToOne(fetch=FetchType.EAGER )
     @JoinColumn(name="PRODUCT_ID")
     public Product getProduct() {
          return product;
     public void setProduct(Product product) {
          this.product = product;
     @Column(name="QUANTITY")
     public Integer getQuantity() {
          return quantity;
     public void setQuantity(Integer quantity) {
          this.quantity = quantity;
     @Column(name="AMOUNT")
     public Integer getTotal() {
          return total;
     public void setTotal(Integer total) {
          this.total = total;
When I execute the JOIN, I get:
05/07/25 15:42:39 Caused by: Exception [TOPLINK-0] (Oracle TopLink - 10g release 3 (10.1.3.0) (Build 050221Dev)): oracle.toplink.exceptions.EJBQLException
Exception Description: Syntax Recognition Problem parsing the EJBQL [SELECT DISTINCT l.total FROM LineItem as l JOIN l.product as p WHERE p.sku = :productId AND l.orderId = :orderId]. The parser returned the following [unexpected token: JOIN].
05/07/25 15:42:39      at oracle.toplink.exceptions.EJBQLException.recognitionException(EJBQLException.java:64)
05/07/25 15:42:39      at oracle.toplink.internal.parsing.ejbql.EJBQLParserBase.reportError(EJBQLParserBase.java:1088)
05/07/25 15:42:39      at oracle.toplink.internal.parsing.ejbql.antlr272.EJBQLParser.selectStatement(EJBQLParser.java:141)
05/07/25 15:42:39      at oracle.toplink.internal.parsing.ejbql.antlr272.EJBQLParser.document(EJBQLParser.java:61)
05/07/25 15:42:39      at oracle.toplink.internal.parsing.ejbql.EJBQLParserBase.parseEJBQLString(EJBQLParserBase.java:1142)
05/07/25 15:42:39      at oracle.toplink.internal.ejb.cmp3.EJBQueryImpl.buildDatabaseQuery(EJBQueryImpl.java:96)
05/07/25 15:42:39      at oracle.toplink.internal.annotations.EJBAnnotationsProcessor.addNamedQueriesToSession(EJBAnnotationsProcessor.java:107)
05/07/25 15:42:39      ... 16 more

The key words INNER JOIN are new to EJBQL in EJB 3.0. The current EJB 3.0 preview only supports EJBQL 2.1 plus two additional aspects of EJB 3.0.
Named Parameters
Bulk Updates.
Note: You do not need to specify the INNER JOIN as by default all EJBQL joins are inner joins.

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can we create a table by using joins in subquery??
like this
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What happens when you try it?
It worked for me. See below:
drop table test_table;
create table test_table as
select e.employee_id, e.first_name || ' ' || e.last_name ename, e.email, e.salary, d.department_name
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I am trying to fetch data from 3 tables (Project,RIsk and Issues) using join. There are Risks associated with some projects and Issues associated with some projects.
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RiskID is primary key in risk table. ProjectID is foreign key.
IssueID is primary key in Issue table.ProjectID is foreign Key.
I need the projectname, count of risks for projects, count of issues for projects. I am using joins in all the 3 tables. Issue here is, its giving me double of count of risks and issues for each project.
Please advise how can I get the correct number. I have used the below query,
select p.projectname,count(r.riskid),count(i.issueid) from project as p
left outer join risk as r on p.projectid=r.projecctid
left outer join issue as i on p.projectid=i.projectid
group by
p.projectname
thanks

Hi All,
I got a new requirement to count, the number of high priority risks as well as high priority issues along with the other details. I modified the below table to include the changes, but I am not getting the desired result. Could you please help?
Original query:
select p.projectname,count(distinct r.riskid), count(distinct i.issueid) from project as p
left outer join risk as r on p.projectid=r.projecctid
left outer join issue as i on p.projectid=i.projectid
group by p.projectname
Modified query:
select p.projectname,count(distinct r.riskid),sum(case when r.riskpriority='high' then 1 else 0 end), sum(case when i.issuepriority='high' then 1 else 0 end),count(distinct i.issueid) from project as p
left outer join risk as r on p.projectid=r.projecctid
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Hi,
I am trying to join two tables using joining.
SQL> select * from test10;
ID
1
2
SQL> select * from test11;
ID
1
3
4
My expected output is
ID
1
2
3
4
I am able to do this using "Union"
SQL> select * from test10
2 union
3 select * from test11;
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1
2
3
4
But i want to achieve this using join. Please help..
Thanks & Regards,
Arijit

Hi, Arijit,
The way to do that with a join is FULL OUTER JOIN, like this:
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FROM               test10 t10
FULL OUTER JOIN test11 t11 ON   t10.id = t11.id
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;If that's exactly what you're trying to do, you should stick with the UNION.
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Hello all,
I have the following query that needs to be written using Joins. I am not sure if this is the correct place to post this question
Tables used:
1. activities: (a_id, n_id, market, amount, act_type, act_number, act_seq) --the money paid by the registrant for the market.
2. market_reg (a_id, n_id, market, reg_stage) -- for each market there are registrants
3. market (market) -- stores market details
I need to get sum of total_payment_amount using the condition. I know the query is not opitmized and its not the correct way to get info. I was
wondering if you guys can suggest me a query that will pull the information by using joins
SELECT a.a_id, a.n_id, SUM (a.total_payment_amount)
FROM activities a
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WHERE mr.market = 'marketname'
AND mr.reg_stage = 'P'
AND mr.n_id <> 0)
AND (a.act_type = 'A'
OR (a.act_type IS NULL
AND a.act_number||act_seq IN
( SELECT a1.act_number||a1.act_seq
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WHERE a1.market = 'marketname'
GROUP BY a1.act_number||a1.act_seq
HAVING COUNT (a1.act_number||a1.act_seq) = 1)))
GROUP BY a.a_id, a.n_id;
Thanks

Hi,
I see you have already re-posted this on a more appropriate forum, the SQL and PL/SQL forum.
Thanks,
Gary

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