What is the role of DB administrator?
Your responsibility as a database administrator (DBA) will be the performance, integrity and security of a database. You’ll be involved in the planning and development of the database, as well as in troubleshooting any issues on behalf of the users. You’ll ensure that: data remains consistent across the database.
What are five main functions of a database administrator?
The Key Responsibilities of a Database Administrator
- Software installation and Maintenance.
- Data Extraction, Transformation, and Loading.
- Specialised Data Handling.
- Database Backup and Recovery.
- Security.
- Authentication.
- Capacity Planning.
- Performance Monitoring.
What a database administrator should know?
In addition to certification from relevant software vendors, database administrators need to know the basics of computer languages like Apache, HTML, Java and SQL. Database administrators also need familiarity with the Linux and UNIX platforms as well as programs like Microsoft Access and Oracle.
What is primary key in DBMS?
A primary key is the column or columns that contain values that uniquely identify each row in a table. A database table must have a primary key for Optim to insert, update, restore, or delete data from a database table.
What is DBMS life cycle?
The database life cycle incorporates the basic steps involved in designing a global schema of the logical database, allocating data across a computer network, and defining local DBMS-specific schemas. Once the design is completed, the life cycle continues with database implementation and maintenance.
What are the four roles of data administration?
Database planning, analysis, design, implementation, and maintenance.
Is DBA job stressful?
“A Database Administrator has a special responsibility for a component that is critical to the success or failure of a business: its DATA. This makes being a DBA very challenging and stressful given its many responsibilities.
What are database skills?
Database skills are abilities and knowledge that are required for database related roles such as database development and database administration. This is a large and diverse area of IT skills that may be specific to a particular type of database such as relational or NoSql databases.
What are the 4 types of database?
Four types of database management systems
hierarchical database systems. network database systems. object-oriented database systems.
Can primary key be null?
A primary key defines the set of columns that uniquely identifies rows in a table. When you create a primary key constraint, none of the columns included in the primary key can have NULL constraints; that is, they must not permit NULL values.
What are the 5 phases of database design?
The five stages in the database life cycle are: Requirements analysis. Logical design. Physical design.
What are the 6 main steps of database development?
The Database Life Cycle (DBLC) contains six phases, as shown in the following Figure: database initial study, database design, implementation and loading, testing and evaluation, operation, and maintenance and evolution.
What is difference between data administrator and database administrator?
Data admin analyzes the database for relevant data. Database admin optimizes and maintains the database.
What is database administration process?
We previously listed a DBAs duties, but here they are in summary:
- Database installation and configuration.
- Data security.
- User creation and maintenance.
- Database backups and recovery.
- Database performance tuning and optimization.
- Data transformation and loading.
- Reporting and querying.
Does DBA require coding?
It’s been my experience that while most DBA’s have some kind of development background, they are not at all required to write code.
Does database administrator need coding?
Do database administrators need to know programming? As a database administrator, your role is not to develop software or websites, but you’ll be working closely with developers. Therefore, although it’s not mandatory, having programming skills could make your job easier.
What are your top 3 skills as a DBA?
Key skills for database administrators
- Patience.
- Meticulous attention to detail.
- A logical approach to work.
- The ability to prioritise tasks.
- Problem-solving skills.
- Good organisational skills.
- Communication and interpersonal skills.
Is Excel a database?
Excel is not a database. Excel is only a spreadsheet software that cannot be considered as a database because it lacks data integrity, proper structure, table relationships, and database keys that exist in databases. However, Excel can be used as a temporary substitute for data storage in small amounts.
What are the 3 main types of databases?
hierarchical database systems. network database systems. object-oriented database systems.
What are 3 examples of a database?
Some examples of popular database software or DBMSs include MySQL, Microsoft Access, Microsoft SQL Server, FileMaker Pro, Oracle Database, and dBASE.
What is FK in SQL?
A FOREIGN KEY is a field (or collection of fields) in one table, that refers to the PRIMARY KEY in another table. The table with the foreign key is called the child table, and the table with the primary key is called the referenced or parent table.
Can primary key be duplicated?
You can define keys which allow duplicate values. However, do not allow duplicates on primary keys as the value of a record’s primary key must be unique. When you use duplicate keys, be aware that there is a limit on the number of times you can specify the same value for an individual key.
What is normalization?
Normalization is the process of organizing data in a database. This includes creating tables and establishing relationships between those tables according to rules designed both to protect the data and to make the database more flexible by eliminating redundancy and inconsistent dependency.
What is the role of DBA write 10 points?
DBA is held responsible and accountable for logical, physical design, external model design, and integrity and security control. DBA implements DBMS and checks database loading at time of its implementation. DBA enhances query processing by improving their speed, performance and accuracy.
How many types of DBMS are there?
There are three main types of DBMS data models: relational, network, and hierarchical.