Caterpillar Inc Data Analyst Interview Questions and Answers

Order of execution in SQL determines the sequence in which different clauses are processed in a query.

• SQL query is processed in the following order: FROM, WHERE, GROUP BY, HAVING, SELECT, ORDER BY.

• FROM clause is processed first to retrieve data from tables.

• WHERE clause filters the data based on specified conditions.

• GROUP BY clause groups the data based on specified columns.

• HAVING clause filters the grouped data.

• SELECT ...read more

ETL stands for Extract, Transform, Load. It is a process used to extract data from various sources, transform it into a consistent format, and load it into a target database.

• Extract: Data is extracted from different sources such as databases, files, APIs, etc.

• Transform: Data is cleaned, validated, and transformed into a consistent format suitable for analysis.

• Load: The transformed data is loaded into a target database ...read more