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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

Data Science Real Advantages to Read Today

Real business solution you can get from data science analysis. Your sales is the main requirement. No sales means no business. Data Analytics helps to boost your organization sales.

Real Advantages of Data Science

My presentation here gives you complete business picture of data analytics, and skills companies expecting from analytics team.
  1. Data analytics-The data can be from web, user devices, own databases and Social media
  2. AI-Delivering products based on artificial intelligence
  3. Big data-Data of any format and you need to make ready for analysis.
  4. You can understand patterns of people
  5. You can explore current market
  6. You can explore solutions to Agriculture
  7. You can show answers to weather
  8. Predicting the disaster like earth-quake 

Data Analytics what else you can read


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