SQL INTERVIEW QUESTION
Amol Tathe
Software Engineer | SQL Developer | Hackerrank SQL 5? | Ex - Walmart | Advance SQL | Oracle / MSSQL SQL | Advance PL SQL | BigQuery | Google | IBM Cloud | Data Engineer | AWS | TCS Data Management | Immediate Joiner |
SQL IMPORTANT QUESTION
1) What is SQL?
2) When SQL appeared?
3) What are the usages of SQL?
4) Does SQL support programming language features?
5) What are the subsets of SQL?
6) What is the purpose of DDL Language?
7) What is the purpose of DML Language?
8) What is the purpose of DCL Language?
9) What are tables and fields in the database?
10) What is a primary key?
11) What is a foreign key?
12) What is a unique key?
13) What is the difference between a primary key and a unique key?
14) What is a Database?
15) What is meant by DBMS?
16) What are the different types of database management systems?
17) What is RDBMS?
18) What is Normalization in a Database?
19) What is the primary use of Normalization?
20) What are the disadvantages of not performing database Normalization?
21) What is an inconsistent dependency?
22) What is Denormalization in a Database?
23) What are the different types of SQL operators?
24) What is a view in SQL?
25) What is an Index in SQL?
26) What are the different types of indexes in SQL?
27) What is the unique index?
28) What is clustered index in SQL?
29) What is the non-clustered index in SQL?
30) What are the differences between SQL, MySQL, and SQL Server?
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