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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

6 Top IT Skills that have Huge demand for the next 5 Years

These are top IT skills you need to know. Also, these are highly employable skills. These you can say as digital skills. Digital skills fetch you best salary, according to surveys by top job portals.
top it skills useful to know

6 Top IT SKills

  1. SAS and R Programming
  2. Full stack development
  3. Data Engineering
  4. Data Scinece
  5. Mobile development - Perl, Ruby and Python
  6. Middleware integration software.

The Bottom Line

  • The trend is now changed. You can attend off-line and On-line courses and you can practices daily two hours.
  • Within 2 or 3 months you can be perfect.
  • Select any one skill for your employability.
  • You cannot learn all the skills. It is dofficult to tell answers in the interviews.


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