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SQL Server FAQ - Counting Rows with the COUNT(*) Function

By: FYIcenter.com

(Continued from previous topic...)

How To Count Rows with the COUNT(*) Function?

If you want to count the number of rows, you can use the COUNT(*) function in the SELECT clause. The following tutorial exercise shows you some good examples:

SELECT COUNT(*) FROM fyi_links
GO
7

SELECT COUNT(*) FROM fyi_links 
   WHERE url LIKE '%fyi%'
GO
3

So there are 7 rows in total in table "fyi_links", and 3 rows that have 'fyi' as part of their url names.

(Continued on next topic...)

  1. What Is a SELECT Query Statement?
  2. How To Create a Testing Table with Test Data?
  3. How To Select All Columns of All Rows from a Table with a SELECT statement?
  4. How To Select Some Specific Columns from a Table in a Query?
  5. How To Select Some Specific Rows from a Table?
  6. How To Add More Data to the Testing Table?
  7. How To Sort the Query Output with ORDER BY Clauses?
  8. Can the Query Output Be Sorted by Multiple Columns?
  9. How To Sort Query Output in Descending Order?
  10. How To Count Rows with the COUNT(*) Function?
  11. Can SELECT Statements Be Used on Views?
  12. How To Filter Out Duplications in the Returning Rows?
  13. What Are Group Functions in Query Statements?
  14. How To Use Group Functions in the SELECT Clause?
  15. Can Group Functions Be Mixed with Non-group Selection Fields?
  16. How To Divide Query Output into Multiple Groups with the GROUP BY Clause?
  17. How To Apply Filtering Criteria at Group Level with The HAVING Clause?
  18. How To Count Duplicated Values in a Column?
  19. Can Multiple Columns Be Used in GROUP BY?
  20. Can Group Functions Be Used in the ORDER BY Clause?

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