Hello everybody. Welcome to this class. 2
In this lecture, we are going to discuss database administrators, 3
or DBA, and we are going to discuss the responsibilities and skills. 4
So, what is a DBA? 5
So, a DBA or a database administrator is responsible for performance, 6
security and availability of the company's database. 7
They are responsible for managing the design, 8
implementation and maintenance of the company's database systems. 9
They play a vital role in ensuring that the data is safe, 10
secure, and readily available to authorized set of users. 11
Now, let's take a look at some of the responsibilities of a DBA. 12
So, the number one responsibility is database design and planning. 13
This person is responsible for designing 14
planning of database architecture. 15
They ensure that the data is organized 16
in a way that is easily accessible and efficient. 17
Installation and Configuration, 18
a DBA installs and configures the company's database software 19
and makes sure that it is set up to meet the company's specific needs. 20
Security Management, one of the primary responsibilities of 21
a DBA is to ensure that the data is secured 22
from the unauthorized access. 23
They manage user access, permissions, 24
implement security protocols, and monitor 25
the database for any potential security breaches. 26
Performance Tuning, this is another responsibility of a DBA, 27
wherein they are responsible for optimizing the performance of the database. 28
They monitor database performance, 29
identify the areas that require improvements 30
and make the necessary changes to improve it. 31
Backup and Recovery, a DBA ensures that the 32
database is backed up regularly 33
and a recovery plan is in place in case of a disaster. 34
They also test the backup and recovery plan 35
to ensure that it will work in the event of a data loss. 36
Now, what are some of the skills that are required to become 37
a database administrator? 38
Number one skill is knowledge of SQL. 39
A DBA must be proficient in SQL, 40
which is the language used to communicate with the database. 41
Knowledge of Database Management System, 42
a DBA must have in depth understanding 43
of database management system that they are working with. 44
Performance Tuning, 45
a DBA must have the ability to optimize the performance of 46
a database system by identifying and fixing issues 47
that could impact performance. 48
Disaster Recovery, a DBA must have knowledge and experience 49
in backup and recovery procedures, 50
including the use of recovery software and storage systems. 51
Security Management is another skill that is needed, 52
wherein he must be familiar with the database security, principles, 53
protocols and standards. 54
Now, let us take a look at some of the terms that are 55
associated with a DBA. 56
So, the first term is DBMS. 57
This is nothing but a database management software 58
that manages and organizes data in a database. 59
There is something called as data modelling. 60
Data modelling is a process of creating conceptual representation 61
of data and its relationships. 62
DBAs use data modelling to design the structure 63
and layout of the database. 64
Data Integrity, this refers to 65
accuracy, consistency and reliability of data. 66
And a DBA ensures that the data in the database is 67
correct and 100% reliable. 68
Database tuning is another term that is associated 69
with DBA and this refers to the process of optimizing 70
the performance of the database. 71
Now, DBA will monitor and analyse the performance. 72
It identifies the areas that are needed 73
for improvement and implement the changes 74
to improve the performance. 75
The next term we have is Query Optimization, which is the process 76
of improving the performance of database queries. 77
Now, a DBA can use various techniques such as indexing, 78
caching, to optimize queries and reduce their response times. 79
Backup and recovery, this is another term that is associated, 80
which refers to the process of creating and restoring 81
database backups. 82
Now, a DBA will create a regular backup 83
of the database and it also creates and manages the disaster 84
recovery plan to restore data 85
in its original state. 86
So in short, a DBA plays a crucial role 87
in managing the database and this is a very important role. 88
So, if you are working as a DBA for large e-commerce company, 89
the company's database is responsible for storing 90
customer information, product information and order history and so on. 91
And it will be the DBS responsibility to make sure 92
that it's secure, available, 93
performing optimally at all the times. 94
That's about this class. 95
I shall see you all soon. Thank you.