Home >> Top 210+ SQL Interview Questions and Answers in 2023

Top 210+ SQL Interview Questions and Answers in 2023

SQL(Structured Query Language) for storing, manipulating and retrieving data in databases.

SQL is RDBMS.

RDBMS is a database management system (DBMS) that is based on relational model as introduced by E.F.Code.

It is a DBMS in which the database is organized and accessed according to the relation between data.

In a relational database, relationships between two or more tables by primary and foreign key.

Example- SQL, Orcle, Mysql, Mysql server

Advantage
1-Simple and easy.
2-Faster Query Processing.
3-Standard Language.
4-Portable.
5-Interactive Language.
6-Multiple data views.

Disadvantage
1. Difficult Interface
2. Cost Inefficient
3. Partial Control

1 - What is sql?
2 - Sql is DBMS or RDBMS?
3 - Advantage & disadvantage?
4 - Data Types?
5 - Numeric Data Types?
6 - Floating Data Types?
7 - Date and Time Data Types?
8 - String Data Types?
9 - Enum Data Types?
10 - SET Data Types?
11 - Difference between varchar and char?
12 - Difference between Tinyint and smallint?
13 - Difference between enum and set?
14 - Difference between signed and unsigned?
15 - Operators?
16 - Arithmetic Operators?
17 - Comparison Operators?
18 - Logical Operators?
19 - What is key?
20 - What is super key?

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