SQL is one of the most favorite topics in Data Engineering interviews because Data Engineers should not only be proficient in Programming but should be able to write simple or advanced sql queries, Data Modelling, and Pipeline Design. In this post, we will discuss the possible advanced sql questions asked in Data Engineering Interviews. Advanced SQL Interview Questions 1.  What is the difference between GROUP BY and PARTITION BY? GROUP BY PARTITION BY GROUP BY returns only one row after aggregating columns for each group. PARTITION BY gives aggregated columns for each record in the table. The number of rows in the table is reduced. The number of rows in the table remains the same. It is an aggregation function. It is an analytic function. GROUP BY does not allow to add the columns that are not a part of the GROUP BY clause. With the PARTITION BY clause, we can add any columns. 2.  How to...