SQL Filter results using WHERE and HAVING Equality
Example
SELECT * FROM Employees
This statement will return all the rows from the table Employees.
Id FName LName PhoneNumber ManagerId DepartmentId Salary Hire_date CreatedDate ModifiedDate
1 James Smith 1234567890 NULL 1 1000 01-01-2002 01-01-2002 01-01-2002
2 John Johnson 2468101214 1 1 400 23-03-2005 23-03-2005 01-01-2002
3 Michael Williams 1357911131 1 2 600 12-05-2009 12-05-2009 NULL
4 Johnathon Smith 1212121212 2 1 500 24-07-2016 24-07-2016 01-01-2002
Using a WHERE at the end of your SELECT statement allows you to limit the returned rows to a condition. In this case, where there is an exact match using the = sign:
SELECT * FROM Employees WHERE DepartmentId = 1
Will only return the rows where the DepartmentId is equal to 1:
Id FName LName PhoneNumber ManagerId DepartmentId Salary Hire_date CreatedDate ModifiedDate
1 James Smith 1234567890 NULL 1 1000 01-01-2002 01-01-2002 01-01-2002
2 John Johnson 2468101214 1 1 400 23-03-2005 23-03-2005 01-01-2002
4 Johnathon Smith 1212121212 2 1 500 24-07-2016 24-07-2016 01-01-2002
