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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

Cloud Computing - Career Options

There is an explosion in both the use of cloud computing and the demand for people to assist in the mass migration to cloud. Indeed, there are about 50 to 70 jobs chasing truly qualified candidates at this point in time, according to technical recruiters.
Photo Credit: Srini

Roles in cloud computing

  1. IT pros with specific cloud skills
  2. IT pros with admin skills
  3. Cloud solution architect

Skill set

  • Expertise in Amazon web services
  • Development skills in Google App engine

Leading skill set

  • AWS-amazon web services
  • Microsoft Cloud
  • Rackspace cloud

Typical Cloud Computing certification programs


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