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SQL Interview Success: Unlocking the Top 5 Frequently Asked Queries

 Here are the five top commonly asked SQL queries in the interviews. These you can expect in Data Analyst, or, Data Engineer interviews. Top SQL Queries for Interviews 01. Joins The commonly asked question pertains to providing two tables, determining the number of rows that will return on various join types, and the resultant. Table1 -------- id ---- 1 1 2 3 Table2 -------- id ---- 1 3 1 NULL Output ------- Inner join --------------- 5 rows will return The result will be: =============== 1  1 1   1 1   1 1    1 3    3 02. Substring and Concat Here, we need to write an SQL query to make the upper case of the first letter and the small case of the remaining letter. Table1 ------ ename ===== raJu venKat kRIshna Solution: ========== SELECT CONCAT(UPPER(SUBSTRING(name, 1, 1)), LOWER(SUBSTRING(name, 2))) AS capitalized_name FROM Table1; 03. Case statement SQL Query ========= SELECT Code1, Code2,      CASE         WHEN Code1 = 'A' AND Code2 = 'AA' THEN "A" | "A

13 Cloud Computing Terminology Quick Read

Cloud computing is a big ocean. Due to increased services, a developer must know the glossary ( keywords) involved.

1) AWS

Amazon Web services

2) Content delivery network (CDN)

It is a distributed system. Servers are located in remote locations. Customers feel that they are accessing the servers.

3) Cloud

A global network to access the resources.

4) Cloud portability

The feature to move data from one Cloud provider to another provider.


Moving traditional IT operations to Cloud computing.

6) Cloud storage

It is a service providing to users to store data using the internet or other private networks.

7) Cloudware

It is Software that helps to run user applications in cloud computing.

13 Cloud Computing Terminology Quick Read

8) Cluster

A group of small computers connected together to form a Single big computer. High availability and load balancing are the main benefits.

9) Consumer cloud

The cloud provider offers services to individual users. You can call it a consumer cloud.

10) Consumption-based pricing model

Cloud computing users must pay some fees to the cloud provides. This fee is based on consumption but not on time-based.

11) Content Management Interoperability Services (CMIS)

An open standard to control documents using web protocols

12) Customer self-service

This is a feature that users can manage cloud computing services using Web Services or APIs.

13) Disruptive technology

Technology with innovative methods and offers benefits to users.


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