SQL Server: finding the bad data

Question

How do I select all rows except for ones that where I get an error calling CONVERT on one of the columns?

For example, I am doing this:

SELECT rowid 
FROM batchinfo 
WHERE CONVERT(DATE, reporttime, 101) between '2010-07-01' and '2010-07-31';

And I am getting errors for some of the values. I have two questions:

1. How can I skip the rows that have errors?
2. How can I get only the rows that have errors?

Answer 1

You can use the ISDATE() function to test the values.

SELECT *
FROM MyTable
WHERE ISDATE(MyColumn) != 1

Answer 2

I believe you can utilize the IGNORE statement for this, I may be wrong though.