Perform Inner Join to answer potential Business Question by HR as a Data Analyst

𝗧𝗵𝗶𝘀 𝗶𝘀 𝗵𝗼𝘄 𝘆𝗼𝘂 𝗰𝗮𝗻 𝗮𝗻𝘀𝘄𝗲𝗿 𝗽𝗼𝘁𝗲𝗻𝘁𝗶𝗮𝗹 𝗯𝘂𝘀𝗶𝗻𝗲𝘀𝘀 𝗾𝘂𝗲𝘀𝘁𝗶𝗼𝗻𝘀 𝗯𝘆 𝗛𝗥 𝘂𝘀𝗶𝗻𝗴 𝗷𝗼𝗶𝗻𝘀 𝗶𝗻 𝗦𝗤𝗟 𝗮𝘀 𝗮 𝗱𝗮𝘁𝗮 𝗮𝗻𝗮𝗹𝘆𝘀𝘁!

As a data analyst, you will work with multiple tables in SQL.

This is why you should know how to perform Joins as a data analyst.

Also, let’s try to answer a potential business question by HR using joins in SQL.

𝗕𝘂𝘀𝗶𝗻𝗲𝘀𝘀 𝗤𝘂𝗲𝘀𝘁𝗶𝗼𝗻: How much maximum salary an employee got?

𝗦𝗼𝗹𝘂𝘁𝗶𝗼𝗻:

𝗦𝗘𝗟𝗘𝗖𝗧 𝗲.𝗳𝗶𝗿𝘀𝘁𝗻𝗮𝗺𝗲 𝗔𝗦 “𝗳𝗶𝗿𝘀𝘁𝗻𝗮𝗺𝗲”,
𝗠𝗔𝗫(𝘀.𝘀𝗮𝗹𝗮𝗿𝘆) 𝗔𝗦 “𝗺𝗮𝘅_𝘀𝗮𝗹𝗮𝗿𝘆”

𝗙𝗥𝗢𝗠 𝗲𝗺𝗽𝗹𝗼𝘆𝗲𝗲𝘀 𝗮𝘀 𝗲
𝗜𝗡𝗡𝗘𝗥 𝗝𝗢𝗜𝗡 𝘀𝗮𝗹𝗮𝗿𝗶𝗲𝘀 𝗔𝗦 𝘀 𝗨𝗦𝗜𝗡𝗚 (𝗲𝗺𝗽_𝗻𝗼)

𝗚𝗥𝗢𝗨𝗣 𝗕𝗬 𝗲.𝗳𝗶𝗿𝘀𝘁_𝗻𝗮𝗺𝗲

So, this is how you can perform inner join and answer a potential business question by HR.

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