Answer / rajesh venati

select * from table_name where rownum=1
union
select * from table_name where rowid=(select max(rowid) from
table_name);

Answer / rajesh venati

this will also work

select * from table_name where rowid=(select min(rowid) from
table_name)
union
select * from table_name where rowid=(select max(rowid) from
table_name);

Answer / chandana

select * from table_name
where rowid in ((select min(rowid) from table_name),
(select max(rowid) from table_name));

Answer / ramesh

Select * from table_name where rowid =(select min(rowid)
from tanle_name)
union
select * from table_name where rowid = (select max(rowid0
from table_name);

Answer / samr

use Northwind
go

select top(1) * from Orders
union
select * from orders where orderid =
(select MAX(OrderID) from Orders)

Answer / venkyhulk1

select *
from (select rownum r, e.* from emp e)
where r in ((select max(rownum) from (select rownum , e.*
from emp e)),(select min(rownum) from (select rownum , e.*
from emp e)))


this querry will get the first and last records of the table
with respect to the way the data is stored in the table

Answer / ataullah

Select * from emp where rowid=(select max(rowid) from emp) or rowid=(select min(rowid) from emp)

Answer / ashwani kumar singh

SELECT * FROM EMP WHERE ROWNUM < 2
UNION
SELECT * FROM (SELECT * FROM EMP ORDER BY EMPNO DESC )
WHERE ROWNUM < 2

Answer / nitinmukhraiya

Rownum and RowID displays the results faster than others -

select * from <Table_Name> where rownum=1
union
select * from (select * from <Table_Name> order by rownum desc) where rownum=1

Answer / gourav

select * from emp(table name)
where rownum = 1 and 30



this query will display the first and last record


for eg rownum start from 1 and rownum last record is 30..by
execute this query u wil get frst and last reord

real time applications of nullif?

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write a procedure to print a statement or number not using "dbms_output.put_line" package.write a procedure instead of it using procdure name as "print" ex:- declare a number:=2; begin print(a); end; /* when U type above procedure 2 have to should be printed*/

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create SQL (both DML/DDL) statements appropriate for the creation of relational structures & constraints and other objects for a given case study, the population of these tables and the manipulation (querying/updating) of the stored data. 2. Create, develop and use the PL / SQL Program Units Procedures, Functions as a progression towards Object Oriented Relational Database Programming. 3. Package a collection of logically related Procedures and Functions together to further move towards development of Objects which reflect the principle of Data Abstraction whereby only an Object specified in the Interface is accessible to the end user. 4. Select, create, and use appropriate Database Triggers to impose agreed specific constraints on a Database Table. 5. Provide a full and detailed evaluation which includes a comprehensive test execution plan and its implementation for each of the above. Consider the following case study: Perilous Printing is a medium size printing company that does work for book publishers throughout UK. The company currently has 10 offices, most of which operate autonomously, apart from salaries, which are paid by the head office. Currently the sharing and communication of data, is carried out using multi- user networked access to a centralised RDBMS. Perilous Printing jobs consist of printing books or part of books. A printing job requires the use of materials, such as paper and ink, which are assigned to a job via purchase orders. Each printing job may have several purchase orders assigned to it. Likewise, each purchase order may contain several purchase order items. The following tables form part of the transactional RDB that the company uses: office (office_no, o_addr, o_telno, o_faxno, mgr_nin) staff (staff_no, nin, fname, lname, s_addr, s_telno, gender, dob, position, taxcode, salary, office_no) publisher (pub_no, p_name, p_city, p_telno, p_faxno, credit_code, office_no) book_job (job_no, pub_no, job_date, job_desc, job_type, job_status, supervisor_nin) purchase_order (job_no, po_no, po_date) po_item (job_no, po_no, it_no, qty) item (it_no, it_desc, amt_in_stock, price) office contains details of each office and the office number (office_no) is the key. Each office has a Manager represented by the manager’s national insurance number (mgr_nin). staff contains details of staff; the staff_no is the key. The office that the member of staff works from is given by office_no. publisher contains details of publisher and the publisher number (pub_no) is the key. Publishers are registered with the nearest office in their country, given by office_no, and they are given a credit code that can have the values “AA”, “AB”, “BB”, “BC”, “CC”, “CD” and “DD”. If a publisher is to be deleted then not only the publisher’s entry from the publisher table will have to be removed but all the data associated with the particular supplier has to be deleted too book_job contains details of publishing jobs and the job number (job_no) is the key. The publisher is given by the publisher number (pub_no) and the supervisor for the job by supervisor_nin. The job type can be either null or urgent; whereas the job_status can be “ongoing” or “completed” purchase_order contains details of the purchase orders for each job and the combination of job number and a purchase order number (job_no, po_no) form the key. Each printing job may have several purchase orders assigned to it. item contains details of all materials that can be used in printing jobs and the item number (it_no) is the key. po_item contains details of the items on the purchase order and (job_no, po_no, it_no) forms the key. In the above given database schema, descriptions are strings of characters (at most 30 characters long), any dates (except the job_ date) stored cannot be after the current system date, and quantities and prices are assumed to be non-negative numbers.

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How can we schedule the procedure to run automatically ?

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What is constant in pl sql?

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how do you count the duplicate records in a table

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