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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

4 Top Applications That Running From Cloud

Data Storage and Backup Box.com, Mozy, Joukuu are the applications offering data storage and backup services in cloud. Box.com offers drag and drop service for files. It just required to drop the files into Box and access from anywhere.  Mozy offers online backup service for files during a data loss. 1. Business Applications MailChimp - It offers an e-mail publishing platform. It is widely employed by the businesses to design and send their e-mail campaigns.  Chatter - Chatter app helps the employee to share important information about organization in real time. One can get the instant feed regarding any issue.  Google Apps - for Business Google offers creating text documents, spreadsheets, presentations, etc., on Google Docswhich allows the business users to share them in collaborating manner.  Quickbooks - It offers online accounting solutions for a business. It helps in monitoring cash flow, creating VAT returns and creating business reports. 2. Management A