How to create a query by using a substring of a field as argument?

Question

I want to create a selection in SQL Server where the zipcodes are between 3000 and 3100. The zipcodes are with numeric and alfanumeric values.

How can you create a select statement like this

SELECT * 
FROM TABLE 
WHERE SUBSTRING(A.Zipcode, 1, 4) as integer is between 3000 and 3100

Answer 1

SELECT *
FROM TABLE
WHERE CAST(SUBSTRING(A.Zipcode, 1, 4) AS INT) BETWEEN 3000
        AND 3100

FuzzyTree's comment using CONVERT will work too. CAST and CONVERT perform very similar functions, but CONVERT offers a more flexible output.