Which expression retrieves the first eight letters of recipe_name and stores the result in a new column called recipe_listing?

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Multiple Choice

Which expression retrieves the first eight letters of recipe_name and stores the result in a new column called recipe_listing?

The essential idea is extracting a portion of a string by its position and length. To get the first eight characters of recipe_name, start at the first character and take eight characters, then name the result recipe_listing. SUBSTR(recipe_name, 1, 8) AS recipe_listing does exactly that: it begins at position 1 and pulls eight characters, creating the new column recipe_listing. In many SQL dialects SUBSTR and SUBSTRING are interchangeable, but this form clearly expresses starting at the first character with a fixed length. The other options either start later in the string or use a form that may not be as portable, so they wouldn’t reliably yield the first eight letters.

The essential idea is extracting a portion of a string by its position and length. To get the first eight characters of recipe_name, start at the first character and take eight characters, then name the result recipe_listing. SUBSTR(recipe_name, 1, 8) AS recipe_listing does exactly that: it begins at position 1 and pulls eight characters, creating the new column recipe_listing. In many SQL dialects SUBSTR and SUBSTRING are interchangeable, but this form clearly expresses starting at the first character with a fixed length. The other options either start later in the string or use a form that may not be as portable, so they wouldn’t reliably yield the first eight letters.

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