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  3. Functions for Manipulating Data in SQL Server

Exercise

Calculating the length of a string

It is important to know how to calculate the length of the strings stored in a database. You may need to calculate the product with the shortest name or the person with the longest email address.

Calculating the length of a string also proves to be useful in data cleansing and validation tasks. For example, if a business rule is that all product codes must have at least 6 characters, you can easily find the ones that are shorter.

In SQL Server, you can use the LEN() function for calculating the length of a string of characters.

You will use it in this exercise to calculate the location with the longest name from where cocoa beans are used (column broad_bean_origin, from the ratings table).

Instructions

100 XP
  • Calculate the length of each broad_bean_origin.
  • Order the results from the longest to shortest.