I am a little confused about those things ..:-(

Then how does we create this identity column ?

"You, as the developer, can set a column to be an identity which means it's auto-incremented for new rows. It's still not unique. "

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I got some idea about row number and row Id as :

row id is the unique index number of every row of table maintaining by database automatically and

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okay.. Thank you ..:-)

I thought row number and row index are different concepts .. That's why I ask this question .. Thank you 🙂