The SQL COUNT aggregate function is used to count the number of rows in a database table.
The SQL COUNT syntax is simple and looks like this:
SELECT COUNT(Column1)
FROM Table1
If we want to count the number of customers in our Customers table, we will use the following SQL COUNT statement:
SELECT COUNT(LastName) AS NumberOfCustomers
FROM Customers
The result of this SQL COUNT query will be:
NumberOfCustomers
4
Popular Posts
-
INTRODUCTION TO 'C': C is a programming language developed at AT & T's Bell laboratories of USA in 1972.it was designed by d...
-
The SQL COUNT aggregate function is used to count the number of rows in a database table. The SQL COUNT syntax is simple and looks like this...
-
Files in VB .NET Working with Directories We will work with the File and Directory classes in this section. We will create a directory and c...
-
More Events The Form has more events besides the Form_Load event. How can you find them? Click on the Drop-Down List that found in the upper...
-
The SQL DISTINCT clause is used together with the SQL SELECT keyword, to return a dataset with unique entries for certain database table col...
-
Steps to follow: 1. Write an abstract class called LivingThing.java as shown below in Code-11.4.a. (You are welcome to do this work using ei...
-
JSP scripting elements let you insert Java code into the servlet that will be generated from the current JSP page. There are three forms: ...
-
Lab exercises and homeworks: * Things to check before you start the lab * Chapter 3 (Class #1, Jan. 16th homework) o Exerc...
-
So far we’ve learnt how to select data from a database table and how to insert and update data into a database table. Now it’s time to learn...
-
ARRAYS: An array is a group of related data items that share a common name.For instance,we can define an array name salary to represent a se...
No comments:
Post a Comment