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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

Robotics These Skills You Need

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Robotics is a combination of multiple skills. Out of those many skills similar to B.Tech Electronics skill sets. I am sharing for your quick reference the complete skillset. PROGRAMMING Mat lab - Familiarity with command-line and external functions using MATLAB library; import/export of data; graphing/plotting functions & data; rudimentary animation Python, C / C++ familiarity ROS- Robot Operating System (ROS) - Optional (Good to know) Program Constructs- Sequencing, Selection, Iteration & Recursion Data Organization- Arrays, Lists, Pointers COMPUTERS Tools Productivity: SW (MS Office - Excel / Word / PowerPoint / Project) Operating Systems Windows or Apple-OS - use of personal laptop computer Linux or Ubuntu MATHEMATICS Linear Algebra Inversion, Eigenvalues, Null-Space Linear Differential Eq. Matrix-Algebra & -Manipulation Basic Calculus Derivatives, Gradients, Chain Rule Numerical Integration Basic Computational Implementation, e.g. Runge-Kutta 4 Fourier Analysis Newtonia