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Showing posts with the label Microservices Vs SOA

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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

How Micro-services differ from SOA

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Here you will know the differences between microservices and SOA. Both are different architectures. 1. Micro-services  Microservices are interconnected using simple API You can develop highly scalable and modular applications Service-based architecture It is distributed architecture Here, security is a big challenge. Since there is no middleware Functional services, basically this kind No coordination between services. 2. SOA Service-based architecture It is distributed architecture Security is good It is an infrastructure kind of service Links and References Popular differences between Micro-Services and SOA models Architecture for microservices