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Mini-Quiz: Filtering Data Retrieved from Database Table in SQL

by Ron Kurtus (5 February 2007)

Take this Mini-Quiz to check your understanding of the lesson material.

1. Can you use WHERE when retrieving just one column?

Yes, but the data may not have much use except as a listing

It depends if you are using MySQL or Access databases

No, because you need several columns to use WHERE

2. Can the ">" operator be used with text fields?

Yes, it can be used with any type of data

As long as the text fields are not NULL

No, because "greater than" implies dealing with numbers

3. Why can't you use AND to filter two items from the same column?

You can if you have more than 10 rows in the column

You would end up with zero items listed

You can use as many AND operators as you want in filtering

If you got all three correct, you are on your way to becoming a Champion in Using SQL. If you had problems, you had better look over the material again.

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