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SQL Interview Success: Unlocking the Top 5 Frequently Asked Queries

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 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

Aws course contents ideas to learn

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What you are going to learn in AWS course is matter. So before you take the course just look at the course contents on aws.  AWS Course Contents for beginners What you will get after taking Aws course Recognize terminology and concepts as they relate to the AWS platform Navigate the AWS Management Console Understand the security measures AWS provides Differentiate AWS Storage options and create an Amazon Simple Storage Service (S3) bucket Recognize AWS Compute and Networking options and use Amazon Elastic Compute Cloud (EC2) and Amazon Elastic Block Storage (EBS) Describe Managed Services and Database options Use Amazon Relational Database Service (RDS) to launch an application Identify Deployment and Management options Intended Audience Individuals responsible for articulating the business benefits of AWS services Any individual who is new to AWS SysOps Administrators and Developers who are interested in using AWS services This course includes activities that will