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When should “into” be used rather than “in to,” and vice versa?
Difference between “in” and “into”

I had to write a business plan the other day, and one of my coworkers found that I was using in to incorrectly in the sentence

Data will be imported in to the database.

What is the difference between in to and into?

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marked as duplicate by JSBձոգչ, Mitch, RegDwigнt May 22 '12 at 17:37

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

You can find the answer to this question at english.stackexchange.com/questions/125/… – Christi May 22 '12 at 17:03
Just for the sake of clarity, in this particular case, into would be the correct choice. As for pronunciation...in my experience (American English), one would say into at a faster clip relative to in to. Otherwise, there's no difference. – Drew Christianson May 22 '12 at 17:28

As a rule of thumb, if you can take the part starting with "to..." and put it at the beginnig of the sentence instead, then write it separately. In other cases, writers would tend to write "into":

Step into the function. (Ungrammatical: "*To the function, step in.")

Step in to find the bug. (Grammatical "To find the bug, step in.")

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