What is the correct syntax:
I’m quite sure that your record was successfully created
I’m quite sure your record was successfully created
As Derek mentioned, either is incorrect and neither is wrong, but there might be instances that would prompt someone to include a that.
For example, a that is often inserted is when you want to emphasize that you are paraphrasing a quote. Compare:
(1) Linda said, “Tom has never been to that restaurant.”
(2) Linda said Tom has never been to that restaurant.
(notice that (1) and (2) are exactly the same, word-for-word, save for the punctuation)
(3) Linda said that Tom has never been to that restaurant.
If Linda’s exact quote was,
“I don’t think Tom has ever tried Alice’s Restaurant.”
then it might be best to include the that, to indicate a paraphrase, rather than a quote. However, as one website indicates, using the word that is not mandated:
Another reason might be for the sake of readability. In some contexts, the extra word might be seen as superfluous, so a writer might leave it out. In other contexts, a sentence may have an unnatural flow without the word, so it might get included.
For example, let’s say a friend of ours named Susan was pretending that she has lost one of her shoes, when, in reality, she knew the shoe was still in her car. I might ask:
Who knew Sue knew where her shoe was?
but that reads much like an awkward tongue-twister, particularly since the first four words all rhyme. So, I think I’d be more inclined to say:
Who knew that Sue knew where her shoe was?
even though the first isn’t ungrammatical.
Source : Link , Question Author : user2376 , Answer Author : J.R.