Find duplicates with RANK


Let's clean out duplicates! Here's how.

1️⃣ Check if duplicates exists.
Use π™Άπšπ™Ύπš„π™Ώ π™±πšˆ + π™²π™Ύπš„π™½πšƒ(*) to find duplicates. See example 1 in image below.

2️⃣ Identify exact rows that are duplicated.
Use πšπ™°π™½π™Ί π™Ύπš…π™΄πš(π™Ώπ™°πšπšƒπ™Έπšƒπ™Έπ™Ύπ™½ π™±πšˆ πšŒπš˜πš•πšœ). See example 2.

What does πšπ™°π™½π™Ί π™Ύπš…π™΄πš(π™Ώπ™°πšπšƒπ™Έπšƒπ™Έπ™Ύπ™½ π™±πšˆ πšŒπš˜πš•πšœ) do?
πŸ‘‰ divides the table into multiple partitions, one for each unique value of cols, then
πŸ‘‰ assigns a rank from 1 to the number of rows in the partition, then
πŸ‘‰ returns more than 1 if the row is duplicated

You can even find duplicated values in TWO columns.

In example 3, I find duplicated show_name and actor_name with this:
πšπ™°π™½π™Ί π™Ύπš…π™΄πš(π™Ώπ™°πšπšƒπ™Έπšƒπ™Έπ™Ύπ™½ π™±πšˆ πšœπš‘πš˜πš _πš—πšŠπš–πšŽ, πšŠπšŒπšπš˜πš›_πš—πšŠπš–πšŽ) > 𝟷

As usual, full example below.

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