SQL COUNT() Function |
SQL Sample Code - SQL COUNT() Function |
| SELECT COUNT(column_name) FROM table_name; |
See the examples section below for an explanation of the COUNT function.
What does the COUNT() Function do? |
The SQL COUNT() function calculates the number of rows of retrieved by a SQL select statement.
Sample 1 – SQL COUNT() Function |
In this SQL sample we will use the database table ‘tblCompany’.
| Company_ID | CompanyName | Address | Town | Sales |
| 1 | SQL Sample | 1 Sample St | Hamburg | 10000 |
| 2 | SQL Code Land | 2 Code Rd | Hamburg | 20000 |
| 3 | Sample Code World | 66 SQL St | Curry | 18000 |
| 4 | SQL Reference Ltd | 34 Reference St | Pisa | 17000 |
In this SQL sample we simply want to know the number COUNT() of records in the tblCompany table.
Use the SELECT statement below:
| SELECT COUNT(CompanyName) AS Number_of_records FROM tblCompany; |
The result will look like this:
| Number_of_records |
| 4 |
Note: the AS operator is used to name the result column as ‘Number_of_records'’. See the Alias section of this website to learn more about renaming database columns and tables.
Sample 2 – SQL COUNT() Function using GROUP BY. |
In this SQL sample we will use the database table ‘tblCompany’.
| Company_ID | CompanyName | Address | Town | Sales |
| 1 | SQL Sample | 1 Sample St | Hamburg | 10000 |
| 2 | SQL Code Land | 2 Code Rd | Hamburg | 20000 |
| 3 | Sample Code World | 66 SQL St | Curry | 18000 |
| 4 | SQL Reference Ltd | 34 Reference St | Pisa | 17000 |
In this SQL sample we want to know the number of Sales records for each town in the tblCompany table.
Use the SELECT statement below:
| SELECT Town, COUNT(Sales) FROM tblCompany GROUP BY Town; |
The result will look like this:
| Town | COUNT(Sales) |
| Hamburg | 2 |
| Curry | 1 |
| Pisa | 1 |
Related SQL Sample Code:
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