Table name: T1, it has only one column.
col1
------
c
b
a
b
b
b
b
d
s
a
a
t
s
Requirement:
I need the following output from the above base table by
using SQL query.
col1 Cnt
----- -------
a 3
b 5
Others 5
Please help.
Thanks
Guru
v.gurus@in.com
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.
how can we replace the particular column value of a resulted
set of executed query? I mean write down a sql query to
chane the particular column's value of a resulted set of
executed query
Table Student has 3 columns,Student_id,Student_Name &
Course_Id. Table Course has 2 columns, Course_Id &
Course_Name.Write a query to listdown all the Courses and
number of student in each course.
Table Order_Name has a column Order_Date which gives the
date & Time at which the order is passed.Find the table to
write a query to find out the latest order.
Hi am new to PLSQL & facing problems in writing code like in
SP, Functions, so any one having some SP coding with in
depth explanation please share with me my Email ID
suvarnaatsuvarna@rediffmail.com Or taking tanning on this
please do contact me
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what is the bond code in materialized view?
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what is d diff between grant,commit,rollback n savepoint
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what is the difference between varray and table data
type..please expalain with some examples...
under what situation you will go for varray..instead of
index by table...
Display the total debit counts, total credit counts, sum of
total debits, sum of total credits from an employee's
transaction table (a single table) containing the following
columns.
Transaction_number
Transaction_amount
Transaction_date
Transaction_type --> tells if the amount is a credit or a
debit.
As the query alone is important, the table is left with
specifying just the field's name. Pls help me with this
query.
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