10 lightweight apps

Here’s a collection of 10 lightweight applications if you are running an older PC or even if you’re not.

10 lightweight apps

I tried CCleaner and managed to free up 1Gb on my hard drive.

Using SQL to loop through a result set

Found this code sample recently on how to loop through a result set without using a cursor and therefore reducing any locking problems.

DECLARE @NextID INT

SELECT @NextID = MIN(EmployeeID) FROM EmployeeS

WHILE @NextID IS NOT NULL
BEGIN

SELECT EmployeeID, FirstName + ‘ ‘ + LastName FROM Employees
WHERE EmployeeID = @NextID
SELECT @NextID = MIN(EmployeeID) FROM Employees WHERE EmployeeID > @NextID

END

The code is incomplete.  I imagine using a SELECT INTO statement to insert the records into a temporary table would be useful.

simple SQL for reporting

I’ve been studying for my MCP in database design (70-229) recently when I found this simple and useful query technique.

Scenario:
You have to run a report against two related tables.  Let’s use the Employee and Orders tables from the Northwind sample database.

You want to see a row for every record in the Employee table; however the report has to be filtered using criterion which applies to both tables e.g.

Region = ‘WA’ (Employee table)
Order Date > ‘07/12/1996′ (Orders Table)

What you want is a row for each employee record with NULLs placed in the fields that do not match the criteria.

It’s easy to apply this criterion and obtain output that returns employees that match the criteria, but not all employees would be outputted i.e. those that do not match the criteria.

Here is the SQL to obtain the desired output:

SELECT E.LastName, O.OrderID, O.OrderDate, E.Region
FROM Employees E LEFT OUTER JOIN Orders O
ON E.EmployeeID = O.EmployeeID
AND E.Region = ‘WA’
AND O.OrderDate > ‘1996-07-12′
ORDER BY E.LastName

Note that there is no WHERE clause.

Output: (SQL Server 2000)

Output from SQL code

Unfortunately this SQL doesn’t work in Access.