Unlock Oracle's potential with top talent! Dive into the essential guide to hiring skilled Oracle developers, ensuring robust database solutions and insights.
Oracle is a relational database management system designed specifically for data storage and enterprise grid computing. It is cost-effective, flexible, and can manage enterprise applications. The Oracle database was the first database to support SQL.
Oracle never goes offline and can support businesses 24/7 with database availability and continuity. Tools like Oracle Data Guard ensure that data redundancy is maintained across all levels of data storage. In case of disaster situations, you can extract data from secondary locations for daily operations.
Oracle also has Real Application Cluster (RAC), which allows the database to scale horizontally and vertically through a blade server approach. This ensures that hardware scales without sacrificing productivity and system performance.
The Oracle database offers several tools that help improve system performance, such as Oracle TimesTen Application-Tier Database Cache and Oracle Advanced Compression. Additionally, you can use connection pooling to speed up connection queries along with map partitions to optimize performance.
Data in Oracle is highly secure. This is because Oracle uses database authentication techniques to ensure that only legitimate users are allowed access, while auditing methods ensure user accountability when dealing with protected data. Additionally, you can use Transparent Data Encryption (TDE) to encrypt data at rest and ensure that sensitive columns are protected from malicious users.
Oracle in the current market
The Oracle database and toolset have grown over the years. As a result, Oracle is widely used and trusted by many companies. Additionally, Oracle engineers regularly update it to keep up with the latest technological developments. As of June 2021, the Oracle database system is the most used database in the world with 430,000 customers in 175 countries.
The Oracle database currently has 5 editions: Oracle Database Standard Edition One, Oracle Database Standard Edition, Oracle Database Enterprise Edition, Oracle Database Express Edition and Oracle Database Personal Edition. All of these tools have different features and can be used for a variety of projects and use cases.
Problems companies face when hiring Oracle engineers.
There has been an increase in demand for Oracle engineers, and choosing a suitable Oracle engineer who best meets the organization's needs sometimes becomes a challenge.
Sometimes the engineers selected have the basic knowledge of database administration but lack the problem-solving skills needed when encountering challenging and complex use cases.
Database features such as size, retention, speed, rate of change, and performance change over time. This can make it difficult for engineers working on this database. They need to keep up with these changes and implement them in their applications/technology stack.
How to choose the best Oracle engineer?
In addition to relevant experience, Oracle developers must have basic knowledge of Oracle architecture and database management. Candidates with Oracle certification are naturally preferred.
A good Oracle engineer must also understand programming languages such as C, C++ and Java. They must also know database data warehousing concepts and ETL fundamentals. Additionally, knowledge of ER design and database normalization techniques is useful when dealing with databases.
Interview Questions
How can you differentiate between Varchar and Varchar2?
These are Oracle data types that can store strings of varying lengths. Varchar is the ANSI standard, while Varchar2 is the Oracle standard. Varchar can store up to 2000 bytes and retain unused space if the characters entered into variables are short.
Varchar2, on the other hand, can store up to 4,000 bytes and does not take up unused space. Instead, it frees up any unused space to be used by the system. Therefore, you should use Varchar2 if the length of the string is not fixed.
What is a deadlock and how to fix it?
A deadlock is a stage where 2 or more processes are simultaneously waiting for another to release the resource they are trying to access.
When dealing with deadlocks in Oracle, there are a few things you can try. You can reschedule batch jobs or use smaller blocks with less data. You can also try adding INITRANS to target tables.
What are the differences between a hot backup and a cold backup?
Hot backup is done in real time while users are still logged in. Normally in Oracle, the system creates new data simultaneously and is in ARCHIVELOG mode.
Cold backup can only be done after all database operations have finished. While the cold backup is in progress, you cannot perform any other functions. It also uses fewer resources than hot backup.
What are some development languages supported by Oracle?
Oracle supports multiple languages such as C++, Java, Visual Basic, C, PL/SQL, and COBOL.
What is a synonym and can you create one without having a table?
A synonym is an alternative name for database objects that allows you to access an object from a different schema without worrying about authentication. Thus, it provides data independence and location transparency while maintaining the necessary security for the data.
Job description
We're looking for a smart, adaptable Oracle engineer to join our team. They must be strong team players, passionate about software development and handling databases.
Perfect candidates should be able to create custom SQL queries and procedures. It is an excellent opportunity for results-oriented engineers who want to improve their knowledge, learn skills and take on new and exciting responsibilities.
Responsibilities
- Use table functions, indexes, and views to create, test, and execute SQL code.
- Execute SQL code through stored procedures and triggers
- Load data into a SQL loader and create constraints, views, and packages.
- Search and perform database-related tasks and requests.
- Partition a large table using range partitions.
- Work on dynamic queries and table indexes.
- Coordinate with product managers and analysts to understand business requirements, meet deadlines, and create high-quality products.
- Follow industry best practices and standards.
- {{Adicione outras responsabilidades relevantes}}
Skills and qualifications
- Working knowledge of the Oracle database and its features, such as triggers, procedures and views.
- Experience creating efficient and readable SQL code.
- Proven experience with ETL, partitioning and storage.
- Experience with DOM manipulation and query execution.
- Knowledge of shell scripts for ad-hoc queries.
- Knowledge of database design, analysis, and reporting principles.
- Problem solving skills and team spirit.
- {{Adicione outras estruturas ou bibliotecas relacionadas à sua pilha de desenvolvimento}}
- {{Liste o nível de escolaridade ou certificação necessária}}
Conclusion
The Oracle database has become very popular since its inception in 1977. It has been adopted by numerous organizations across the world for their data storage and enterprise grid computing needs. If you're looking for a database solution that provides scalability and performance without neglecting security, Oracle is the right choice.
