Equi join-table handling, Database Management System

Assignment Help:

Equi Join: A join in which the joining condition is based on equality among values in the common columns. Common columns show (redundantly) in the result table. Let us Consider the following relations:

  • Customer (custid, custname, ...........) and
  • Order (custid, ordered,....................)

Example: What are the names of all customers who have placed orders?

The needed information is available in two tables, customer and order. The SQL solution needs joining the two tables by using equi join.

 SELECT CUSTOMER.CUTOID, ORDER.CUSTOID, CUSTONAME, ORDERID

FROM CUSTOMER, ORDER

WHERE CUSTOMER.CUSTOID=ORDER.CUSTOID;

The output might be:

Customer.custoid

order.custoid

custoname

orderid

--------------------------

------------------

-----------------------

----------

10

10

Pooja Enterprises

1001

12

12

Estern Enterprises

1002

3

3

Impressions

1003

 

 

 

 


Related Discussions:- Equi join-table handling

Objectives of data management, The traffic data mgmt. systems infrastructur...

The traffic data mgmt. systems infrastructure plan describes the software, hardware, data network, and other elements that will support the TDMS. The infrastructure plan is based o

Er diagram, a publishing company produce scientific books on various subjec...

a publishing company produce scientific books on various subjects. the books are written by authors who specialize in one particular subject. the company employs editors who, not n

Clustering indexes, Clustering Indexes It may be an excellent idea to k...

Clustering Indexes It may be an excellent idea to keep data of the students in the order of the programme they have registered as most of the data file accesses may need studen

Sources of utilities for a dbms, There are three main sources of utilities ...

There are three main sources of utilities and applications for a DBMS: a. Vendor applications and utilities are given for working with or maintaining the database, and generally

Data handling and research methods, Data Handling and Research Methods: ...

Data Handling and Research Methods: The dataset encompassing 130 participants contains several variables measuring detrimental health related behaviours referring to the use o

Data redundancy, Data Redundancy -A lot of information is being repeated in...

Data Redundancy -A lot of information is being repeated in the relation. For instance, the information that MCS-014 is named SSAD is repetitive, address of Rahul is "D- 27, Main ro

Ways to suggest the dba, a)  Suppose we updated the catalog tables in real ...

a)  Suppose we updated the catalog tables in real time, that is, after every update, insert, or delete SQL statement were executed-rather than only running RUNSTATS once every few

Back up files, what is the importance of back up files

what is the importance of back up files

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd