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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
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4 Top Applications That Running From Cloud

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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 Applications

There are apps available for management task such as time tracking, organizing notes. Applications performing such tasks are discussed below: SN Application Description.
  1. Toggl-  It helps in tracking time period assigned to a particular project.
  2. Evernote- Evernote is an application that organizes the sticky notes and even can read the text from images which helps the user to locate the notes easily.
  3. Outright-  It is an accounting app. It helps to track income, expenses, profits and losses in real time.

3. Social Applications

There are several social networking services providing websites such as Facebook, Twitter, etc. SN Application Description

1 Facebook- Facebook offers social networking service. One can share photos, videos, files, status and much more.

2 Twitter- Twitter helps to interact directly with the public. One can follow any celebrity, organization and any person, who is on twitter and can have latest updates regarding the same.

Entertainment Applications

4. SN Application Description

  • Audiobox.fm - It offers streaming service, i.e., music can be stored online and can be played from cloud using service's own media player.
  • Art Applications 
  • Moo-  It offers art services such as designing and printing business cards, postcards and minicards.

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