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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
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KYC: Top BlockChain Application Read Today

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SBI is now pressing ahead with its first implementation of the decentralized technology by using an enterprise blockchain solution for managing its Know Your Customer (KYC) system, via a new partnership with Intel that sees the technology giant become the consortium’s official technology advisor.


KYC: Top BlockChain Application Read Today



What is KYC


  • Know your customer means all banks update information about their customers. Customer details are Phone number, Aadhar Card, PAN, Home Address, etc. These details are mandatory to update once in six months.
  • Blockchain Platform to Use in KYC is Hyperledger Sawtooth
  • The enterprise blockchain will run on Hyperledger Sawtooth, a modular platform for developing and deploying blockchains, developed by Intel – a member of the open-source Linux Foundation-led Hyperledger project. The blockchain will also be supplemented by Intel Software Guard Extensions (SGX) to boost the blockchain’s privacy, security, and scalability.
  • The blockchain solution will be delivered by Primechain, an Indian blockchain startup powering the Bankchain consortium.BlockChain applications
  • The solution will help SBI to increase the efficiency of financial transactions without having to compromise data confidentiality and transaction security.
  • Intel SGX can improve blockchain privacy, security, and scalability while Hyperledger Sawtooth is open source and takes advantage of silicon features like Intel SGX to deliver a blockchain application platform.


Blockchain Technology


  • Blockchain is an emerging technology that has the potential benefits to transform traditional business processes and the ways in which data is exchanged by consumers and financial institutions.
  • Blockchain eliminates the need for intermediaries, improving business efficiency, and reducing cost and transaction complexity.

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