BI engineer and data analyst are two roles, with different responsibilities and professional knowledge in the field of data. Here are some differences between them:

Responsibilities and objectives:

BI Engineer: BI Engineer is mainly responsible for developing and maintaining enterprise-level business intelligence systems and data dashboards. They use ETL tools and data warehouse technology to collect, integrate and store data, and design and develop reports, dashboards and data visualization tools to support enterprise decision-making and business analysis.

Data analyst: Data analysts focus on interpreting and analyzing data, providing insights and insight into business problems. They collect, clean and prepare data, use statistical analysis, data mining and machine learning to analyze data, provide data-driven decision support, discover business trends and patterns, and propose improvement suggestions.

Skills requirements:

BI engineer: BI engineers need to have skills in database management, data warehouse design and ETL technology. They are usually familiar with SQL query language, ETL tools (such as Informatica and Talend), data modeling and reporting tools (such as Tableau and Power BI).

Data analyst: Data analysts need skills in statistics, data processing and data analysis. They are usually familiar with data cleaning and preprocessing, statistical analysis tools (such as R, Python, etc. ), data visualization tools (such as Tableau, Excel, etc. ) and basic data mining technology.

Key points:

BI Engineer: BI Engineer mainly focuses on the design and development of data dashboards and reports, and is committed to providing accurate, real-time and easy-to-understand data visualization so that business personnel can quickly obtain key indicators and insights.

Data analyst: Data analysts mainly pay attention to the interpretation and analysis of data, use statistical analysis and machine learning technology to mine patterns and trends in data, and provide in-depth understanding and solutions to business problems.

It should be noted that the specific responsibilities and skill requirements of BI engineers and data analysts may vary from organization to industry. In some cases, the responsibilities of these two roles may overlap. In addition, with the development of data field, some organizations also use the term "BI analyst" to describe professionals who can not only perform the tasks of BI engineers, but also perform data analysis. Therefore, the specific differences of these roles may be different in different organizations and backgrounds.