Answer / swapna

Export the higher version data using lower version Export
utility and import it to the lower version DB.

Answer / shai

Here's the answer straight from the Oracle Utilities guide:

Example:

You can create an Oracle release 7 export file from an
Oracle8 database by running Oracle release 7 Export against
an Oracle8 server. To do so, however, the user SYS must
first run the CATEXP7.SQL script, which creates the export
views that make the database look, to Export, like an
Oracle release 7 database.
Note: An Oracle8 Export requires that the CATEXP.SQL script
is run against the database before performing the Export.
CATEXP.SQL is usually run automatically when the user SYS
runs CATALOG.SQL to create the necessary views.
CATEXP7.SQL, however, is not run automatically and must be
executed manually. CATEXP7.SQL and CATEXP.SQL can be run in
any order; after one of these scripts has been run, it need
not be run again.

So, in order to import the data from 8.0 into 7.3, you must
create the export dmp file using the Oracle 7 release of
Export. Then when you use the Oracle 7 release of Import it
will understand the contents of the dmp file. If you tried
to just export from your 8.0 version and directly import
that using 7, it would fail.

Answer / sanjay

We can use the exp utility which was introduced in oracle 7 to export and we can use the imp utility to import the data.Because oracle always support the lower versions in the higher version.

Answer / santu

it 'll show datafile block header not readable

Explain the steps needed to create the scheduled job?

0 Answers  

---

how to check the 3rd max salary from an employee table? One of the queries used is as follows: select sal from emp a where 3=(select count(distinct(sal)) from emp b where a.sal<=b.sal). Here in the sub query "select count(distinct(sal)) from emp b where a.sal<=b.sal" or "select count(distinct(sal)) from emp b where a.sal=b.sal" should reveal the same number of rows is in't it? Can any one here please explain me how is this query working perfectly. However, there is another query to get the 3rd highest of salaries of employees that logic I can understand. Pls find the query below. "select min(salary) from emp where salary in(select distinct top 3 salary from emp order by salary desc)" Please explain me how "select sal from emp a where 3=(select count(distinct(sal)) from emp b where a.sal<=b.sal)" works source:http://www.allinterview.com/showanswers/33264.html. Thanks in advance Regards, Karthik.

4 Answers  

---

What is replication id?

0 Answers  

---

How to access the current value and next value from a sequence?

6 Answers  

---

what is row? : Sql dba

0 Answers  

---

Will truncate release space?

0 Answers  

---

Can we use delete in merge statement?

0 Answers  

---

I want to know the difference between A Record Type and a Table.

3 Answers   Thermotech,

---

What does (*) mean in sql?

0 Answers  

---

Can you call pl/sql package functions from within a fast formula?

0 Answers  

---

Which is faster count (*) or count 1?

0 Answers  

---

Why cross join is used?

0 Answers  

---