BugRaptors is expertise in backend testing as checking tables, writing queries and procedures. We perform testing in web application or desktop and database can be used in the application like SQL or Oracle. We perform database testing on many projects like banking, finance, health insurance which requires extensive database testing. We are also expertise in “Data Migration” testing in which we migrates the client’s database into our local database and then compare both database by executing the sql queries.

1. Why Back-end is the most
important part of the system

2. Backend Testing: The inevitable part of
Software testing
 A backend or database is the most
important part of any client/server system.
The data entered in the front end will be
stored in the back-end If the backend fails,
it may cause data corruption, data loss,
system deadlock, and bad performance.

3.  Many frontends log on to a single SQL server. A
bug in a database may put serious effect on the
whole system. Too many bugs in a backend might
cost many resources to find and fix bugs and
interrupt the system development.
 There are various phases in back-end testing. The
first step is to acquire design specification for an
SQL server. The next step is to test specification
design, followed by implementing the tests in this
design with SQL code.

4.  There are so many tests in a frontend which only hit a
small area of a backend. Many bugs in database cannot
be easily discovered without direct testing. Database
testing has several advantages. The database remains
no longer a black box to testers. Testers have full
control of depth and test coverage. Many bugs can be
efficiently found and fixed in the early development
stage.

5. Why Backend testing is not easy to
understand as compare to front-end
 Sometimes it is not very easy to understand and
verify the database as compared to a frontend
because a frontend generally has intuitive and
friendly user interfaces. A good back end test will
help minimize the burden of frontend test.

6.  A backend has its own objects such as stored
procedures, triggers and tables. Data
integrity and protection is critical.

7.  Multi-user support and Performance are big
issues. Slowness in operation can result in
performance blockages and can be vital to
the project’s future. To be able to do database
testing, a tester must have strong
background in SQL language and server.

8. Most effective approaches in Back-end
testing
 Backend test methodology has so many
things in common with API testing and
frontend testing. Many test methods can be
used for database testing.

9.  Functional testing and Structural testing are more
effective approaches in database testing. They are
coincided in some test approaches.
 Both the front-end and Back-end Testing methods
may find out different bugs, it is strongly
mentioned that testers should do both types of
testing.

10. Test methods that can be applied on
backend testing
 Functional Testing: A database can be broken down
into a finite number of testable pieces based on
application’s functionality. The main focus remains on
functionality of input and output but not on the
execution and structure. Different projects have
different structures and have different ways to break
down.

11.  Structural Testing: A database can be broken down
into a finite number of testable pieces based on a
Database structure. Tests will check each and every
object in a type of structure.
 Boundary Testing: Many fields have boundary
conditions. For example, in a column for percentages,
the value cannot be less than zero and cannot be
greater than 100%. We should find out such boundary
conditions and analyze them out.

12.  Performance Testing: Performance testing is
another important phase of database testing. The
performance specifies and measures Query
performance. SQL Query Analyzer offers some
features also to measure query performance. I have
seen developers measure the Query performance
during the Unit testing but I can’t find any reason
why testers should not do it.

13.  Stress Testing: It involves exposing a database to heavy
loads. For example, many users profoundly use the same
table that has a large number of records. To build this
situation, we need to start as many machines as possible
and run the tests again and again.

14.  Other important concerns while doing database
testing is that it is a skill demanding job and it requires
the widespread knowledge of different databases. This
testing requires more perseverance and patience
because unlike functional testing, there won’t be
enough bugs to find.

15.  I have seen database testing becoming more and more
important in those cases when the application under
test has to be combined with a third party application
having different database. I have personally found
database testing very interesting because individual
needs vast knowledge of different databases, field
mappings and also the possibility of finding project
critical data loss bugs.