Scenario-Based SQL Interview Questions The Bottom Line Top SQL Interview Questions List for 2025 SQL is a common language for Structured Query Language, which is based on general English, whereas MySQL is a database management system. Structured Query Language is the main part of the relational d...
SQL stands for Structured Query Language , and it is used to communicate with the Database. This is a standard language used to perform tasks such as retrieval, updation, insertion and deletion of data from a database. 7. What is a unique key? A Unique key constraint uniquely identified e...
172 SQL Questions and Answers:SQL Job Interview Questions Table of Contents: What is SQL (Structured Query Language)? What is the SQL*Plus? What is NVL? What is a Character Functions? What is SET? What is a TTITLE & BTITLE? What is sql BREAK? What is sql JOIN? What is sql ...
Here are some e-commerce SQL interview questions: 1.Product Catalog Query: Write an SQL query to retrieve the names and prices of all products in the product catalog. 2.Order Summary Query: Create an SQL query to calculate the total revenue generated from orders placed in the last month. ...
Therefore, the second query reorders the 10 records in ascending order (which the default sort order) and then selects the top record (which will now be the lowest of those 10 salaries). Not all databases support the TOP keyword. For example, MySQL and PostreSQL use the LIMIT keyword, ...
have permission to query the view, while denied access to the rest of the base table. SQL INTERVIEW QUESTIONS AND ANSWERS 7 | P a g e Views can join and simplify multiple tables into a single virtual table Views can act as aggregated tables, where the database engine aggregates data (su...
or combination of tables. Users can write and execute queries to retrieve, delete or update information in a database. Usually, a query response returns data from different tables within the database, but this does not apply every time (for example, a delete query will not return anything)....
Q. How you will avoid duplicating records in a query? A By using DISTINCT Q. What is difference between Rename and Alias? Rename is a permanent name given to a table or column whereas Alias is a temporary name given to a table or column which do not exist once the SQL statement is ...
If you create an index on each column of a table, it improves the query performance, as the query optimizer can choose from all the existing indexes to come up with an efficient execution plan. At the same t ime, data modification operations (such as INSERT, UPDATE, DELETE) will become ...
These are just basic questions and you can check the data analyst interview questions here. CLICK HERE TO GET INTERVIEW QUESTIONS FOR TCS… Following are some important Interview Questions for SQL : 1.What is SQL?Where SQL is used? Answer: SQL is Structured Query Language, which is a ...