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MySQL Tutorial - Count Number of Rows with SELECT Statements

By: FYIcenter.com

(Continued from previous topic...)

How To Use SELECT Statement to Count Number of Rows?

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 example:

mysql> SELECT COUNT(*) FROM fyi_links;
| COUNT(*) |
|        7 |
1 row in set (0.00 sec)

mysql> SELECT COUNT(*) FROM fyi_links 
   WHERE url LIKE '%fyi%';
| COUNT(*) |
|        3 |
1 row in set (0.01 sec)

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?
  4. How To Select Some Columns from a Table?
  5. How To Select Some Rows from a Table?
  6. How To Add More Data to the Testing Table?
  7. How To Sort the Query Output?
  8. Can the Query Output Be Sorted by Multiple Columns?
  9. How To Sort Output in Descending Order?
  10. How To Use SELECT Statement to Count Number of Rows?
  11. Can SELECT Statements Be Used on Views?
  12. How To Filter Out Duplications in Returning Rows?
  13. What Are Group Functions?
  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 Groups?
  17. How To Apply Filtering Criteria at Group Level?
  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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