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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

Benefits of having Certified SAS Base Programmer

Why certification is beneficial?

Professionals in data management, data warehousing or in a business intelligence role would find the certification ideal. In addition, recent college graduates having an inclination to logically solve problems and pursuing to enter the data analysis field will find the certification beneficial to kick start their careers. 
Certification in Base SAS
Base SAS Programmer

This course is also ideal, if you are a working professional OR a recent graduate who is
  • Aspiring to be in fast growing career
  • Looking for a more challenging position
  • Aiming to get into a more skillful role
  • Aspiring to be one of the coolest scientists of 21st century
What is Base Sas?

It's the foundation for all SAS software. Along with an easy-to-learn, flexible programming language, you get a web-based programming interface; ready-to-use programs for data manipulation, information storage and retrieval, descriptive statistics and reporting; a centralized metadata repository; and a macro facility that reduces programming time and maintenance headaches.


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