Query between schemas

We are migrating our application from SQL Server 2005 to ORacle 9i. We used to have queries that extracted data between different databases in SQL Server, we've encountered problems doing the same in ORacle. What used to be separate Databases in SQL Server appear now as different Schemas in Oracle. Ive read about Database Links and making use of them in our queries but Im not sure if this applies here since we are using the same database, just different schemas.
I appreciate your help,
JD

JD,
In FROM clause you can specify the schema, for example:
SELECT *
FROM s1.t1,
s2.t2
WHERE ...Also, you need to grant access accordingly. If the query is executed by user (schema) s1, then s1 must have SELECT privilege to read data in table s2.t2.
GRANT SELECT ON s2.t2 TO s1Finally, you do a better job if you use roles, not granting privileges direct to users.
Read about grants and roles.
Regards,
Miguel

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Message was edited by:
Ray R

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Dear
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