Showing posts with the label agile vs waterfall

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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

Top Differences Read Today Agile vs Waterfall model

The Agile and Waterfall both models are popular in Software development. The Agile model is so flexible compared to the waterfall model. The top differences between Waterfall and Agile give you a clear understanding of both processes. Waterfall Model The traditional model is a waterfall. It has less flexibility. Expensive and time-consuming model. Less scalable to meet the demand of customer requirements. The approach is top-down. Starting from requirements one has to finish all the stages, till deployment to complete one cycle. With a small change in requirement, one has to follow all the stages till deployment. The waterfall model creates idleness in resource management. Agile Model The agile model is excellent for the rapid deployment of small changes The small split requirements you can call sprints Less idleness in resource management. Scope for complete team involvement. Faster delivery makes clients happy. You can deploy changes related to compliance or re