SQL Server-Learn by practical: convert, hàm tập hợp, group by, top with ties, left, right, full join

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SQL Server - Learn by practical:
- Hàm convert()
- Hàm tập hợp (Aggregate)
- Hàm ngày tháng
- Group By
- Mệnh đề Top với with ties
- left, right, full join
- Truy vấn con
- Like và not like()
- in() và not in()
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  2. sql server
  3. convert
  4. right
  5. full join
  6. Hàm tập hợp (Aggregate)
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