Rajesh Umrao‒Data&AI - Invidious

Rajesh Umrao‒Data&AI

I simplify the complex world of 𝐃𝐚𝐭𝐚 𝐀𝐧𝐚𝐥𝐲𝐭𝐢𝐜𝐬, 𝐃𝐚𝐭𝐚 𝐒𝐜𝐢𝐞𝐧𝐜𝐞 into bite-sized, actionable insights.
On this channel, you'll learn SQL, Python, Power BI, ETL, Data Visualization, and interview preparation through practical examples, real-world business scenarios, and hands-on projects.
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🧑🏼‍💼ᗩᗷOᑌT ᗰE:
Hey, I’m Rajesh— 𝐒𝐞𝐧𝐢𝐨𝐫 𝐀𝐧𝐚𝐥𝐲𝐬𝐭 and proud 𝐍𝐈𝐓 𝐇𝐚𝐦𝐢𝐫𝐩𝐮𝐫(𝐇𝐏) alumnus.
𝐋𝐢𝐧𝐤𝐞𝐝𝐈𝐧: www.linkedin.com/in/rajeshumrao/
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🔍𝐖𝐇𝐀𝐓 𝐘𝐎𝐔'𝐥𝐥 𝐄𝐗𝐏𝐋𝐎𝐑𝐄:
①𝗗𝗮𝘁𝗮 𝗔𝗻𝗮𝗹𝘆𝘁𝗶𝗰𝘀 & 𝗗𝗮𝘁𝗮 𝗦𝗰𝗶𝗲𝗻𝗰𝗲: SQL, Python, Power Bi and more
②𝗠𝗮𝗰𝗵𝗶𝗻𝗲 𝗟𝗲𝗮𝗿𝗻𝗶𝗻𝗴 & 𝗔𝗜: ML, AI, Algorithms, Deep Learning
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Posts

Rajesh Umrao‒Data&AI

Conceptual difference between WHERE and HAVING?
𝙥𝙡𝙨 𝙎𝙐𝘽𝙎𝘾𝙍𝙄𝘽𝙀, 𝙞𝙩 𝙖𝙘𝙩 𝙖𝙨 𝙝𝙚𝙡𝙥

21 hours ago | [YT] | 12

Rajesh Umrao‒Data&AI

Interview Trap💀⚡

Detailed explanation: medium.com/@rajesh_data_ai/sql-interview-question-…

1 day ago | [YT] | 7

Rajesh Umrao‒Data&AI

What does GROUP BY fundamentally do?
𝙥𝙡𝙨 𝙎𝙐𝘽𝙎𝘾𝙍𝙄𝘽𝙀, 𝙞𝙩 𝙖𝙘𝙩 𝙖𝙨 𝙝𝙚𝙡𝙥

1 day ago | [YT] | 11

Rajesh Umrao‒Data&AI

Why can COUNT(column) and COUNT(*) return different results?
𝙥𝙡𝙨 𝙎𝙐𝘽𝙎𝘾𝙍𝙄𝘽𝙀, 𝙞𝙩 𝙖𝙘𝙩 𝙖𝙨 𝙝𝙚𝙡𝙥

2 days ago | [YT] | 15

Rajesh Umrao‒Data&AI

CROSS JOIN conceptually produce? (In SQL)
𝙥𝙡𝙨 𝙎𝙐𝘽𝙎𝘾𝙍𝙄𝘽𝙀, 𝙞𝙩 𝙖𝙘𝙩 𝙖𝙨 𝙝𝙚𝙡𝙥

3 days ago | [YT] | 15

Rajesh Umrao‒Data&AI

Key difference between RANK() and DENSE_RANK() in SQL?
𝙥𝙡𝙨 𝙎𝙐𝘽𝙎𝘾𝙍𝙄𝘽𝙀, 𝙞𝙩 𝙖𝙘𝙩 𝙖𝙨 𝙝𝙚𝙡𝙥

4 days ago | [YT] | 14

Rajesh Umrao‒Data&AI

Which SQL function is particularly useful for accessing the value from the next row?
𝙥𝙡𝙨 𝙎𝙐𝘽𝙎𝘾𝙍𝙄𝘽𝙀, 𝙞𝙩 𝙖𝙘𝙩 𝙖𝙨 𝙝𝙚𝙡𝙥

5 days ago | [YT] | 22

Rajesh Umrao‒Data&AI

Join me on WhatsApp: whatsapp.com/channel/0029VbBMAuOE50UewyMbGJ1o

5 days ago | [YT] | 3

Rajesh Umrao‒Data&AI

In SQL,What is the main purpose of NULLIF()?
𝙥𝙡𝙨 𝙎𝙐𝘽𝙎𝘾𝙍𝙄𝘽𝙀, 𝙞𝙩 𝙖𝙘𝙩 𝙖𝙨 𝙝𝙚𝙡𝙥

6 days ago | [YT] | 19

Rajesh Umrao‒Data&AI

In SQL,Which statement about NULL = NULL is generally correct?
𝙥𝙡𝙨 𝙎𝙐𝘽𝙎𝘾𝙍𝙄𝘽𝙀, 𝙞𝙩 𝙖𝙘𝙩 𝙖𝙨 𝙝𝙚𝙡𝙥

6 days ago | [YT] | 11