AWS Serverless Lambda Scheduled Events to Store Tweets in Couchbase explained how to store tweets in Couchbase using AWS Serverless Lambda. Now, this Lambda Function has been running for a few days and has collected 269 tweets from @realDonaldTrump. This blog , inspired by SQL on Twitter: Analysis Made Easy Using N1QL, will show how these tweets can be analyzed using N1QL.
N1QL is a SQL-like query language from Couchbase that operates on JSON documents. N1QL and SQL Differences provide differences between N1QL and SQL. Let’s use N1QL to reveal some interesting information from @realDonaldTrump‘s tweets.
Many thanks to Sitaram from N1QL team to help hack the queries.
How Many Tweets
First query is to find out how many tweets are available in the database. The query is pretty simple:
Query:
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SELECT COUNT(*) tweet_count
FROM twitter;
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As you notice, the syntax is very similar to SQL. SELECT, COUNT and FROM clauses are what you are already familiar with from SQL syntax. tweet_count is an alias defined for the returned result. twitter is the bucket where all the JSON documents are stored.
Results:
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[
{
"tweet_count": 269
}
]
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The result is a JSON document as well.
Tweet Sample JSON Document
In order to write queries on a JSON document, you need to know the structure of the document. The next query will give you that.
Query:
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SELECT *
FROM twitter
LIMIT 1;
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The new clause introduced here is LIMIT. This allows to restrict the number of objects that are returned in a result set of SELECT.
Results:
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[
{
"twitter": {
"accessLevel": "0",
"contributors": [],
"createdAt": "1480828438000",
"currentUserRetweetId": "-1",
"displayTextRangeEnd": "-1",
"displayTextRangeStart": "-1",
"favoriteCount": "116356",
"favorited": false,
"geoLocation": null,
"hashtagEntities": [],
"id": "805278955150471168",
"inReplyToScreenName": null,
"inReplyToStatusId": "-1",
"inReplyToUserId": "-1",
"lang": "en",
"mediaEntities": [],
"place": null,
"possiblySensitive": false,
"quotedStatus": null,
"quotedStatusId": "-1",
"rateLimitStatus": null,
"retweet": false,
"retweetCount": "28330",
"retweeted": false,
"retweetedByMe": false,
"retweetedStatus": null,
"scopes": null,
"source": "<a href=\"http://twitter.com/download/android\" rel=\"nofollow\">Twitter for Android</a>",
"symbolEntities": [],
"text": "Just tried watching Saturday Night Live - unwatchable! Totally biased, not funny and the Baldwin impersonation just can't get any worse. Sad",
"truncated": false,
"urlentities": [],
"user": {
"accessLevel": "0",
"biggerProfileImageURL": "http://pbs.twimg.com/profile_images/1980294624/DJT_Headshot_V2_bigger.jpg",
"biggerProfileImageURLHttps": "https://pbs.twimg.com/profile_images/1980294624/DJT_Headshot_V2_bigger.jpg",
"contributorsEnabled": false,
"createdAt": "1237383998000",
"defaultProfile": false,
"defaultProfileImage": false,
"description": "President-elect of the United States",
"descriptionURLEntities": [],
"email": null,
"favouritesCount": "46",
"followRequestSent": false,
"followersCount": "19294404",
"friendsCount": "42",
"geoEnabled": true,
"id": "25073877",
"lang": "en",
"listedCount": "52499",
"location": "New York, NY",
"miniProfileImageURL": "http://pbs.twimg.com/profile_images/1980294624/DJT_Headshot_V2_mini.jpg",
"miniProfileImageURLHttps": "https://pbs.twimg.com/profile_images/1980294624/DJT_Headshot_V2_mini.jpg",
"name": "Donald J. Trump",
"originalProfileImageURL": "http://pbs.twimg.com/profile_images/1980294624/DJT_Headshot_V2.jpg",
"originalProfileImageURLHttps": "https://pbs.twimg.com/profile_images/1980294624/DJT_Headshot_V2.jpg",
"profileBackgroundColor": "6D5C18",
"profileBackgroundImageURL": "http://pbs.twimg.com/profile_background_images/530021613/trump_scotland__43_of_70_cc.jpg",
"profileBackgroundImageUrlHttps": "https://pbs.twimg.com/profile_background_images/530021613/trump_scotland__43_of_70_cc.jpg",
"profileBackgroundTiled": true,
"profileBannerIPadRetinaURL": "https://pbs.twimg.com/profile_banners/25073877/1479776952/ipad_retina",
"profileBannerIPadURL": "https://pbs.twimg.com/profile_banners/25073877/1479776952/ipad",
"profileBannerMobileRetinaURL": "https://pbs.twimg.com/profile_banners/25073877/1479776952/mobile_retina",
"profileBannerMobileURL": "https://pbs.twimg.com/profile_banners/25073877/1479776952/mobile",
"profileBannerRetinaURL": "https://pbs.twimg.com/profile_banners/25073877/1479776952/web_retina",
"profileBannerURL": "https://pbs.twimg.com/profile_banners/25073877/1479776952/web",
"profileImageURL": "http://pbs.twimg.com/profile_images/1980294624/DJT_Headshot_V2_normal.jpg",
"profileImageURLHttps": "https://pbs.twimg.com/profile_images/1980294624/DJT_Headshot_V2_normal.jpg",
"profileLinkColor": "0D5B73",
"profileSidebarBorderColor": "BDDCAD",
"profileSidebarFillColor": "C5CEC0",
"profileTextColor": "333333",
"profileUseBackgroundImage": true,
"protected": false,
"rateLimitStatus": null,
"screenName": "realDonaldTrump",
"showAllInlineMedia": false,
"status": null,
"statusesCount": "34269",
"timeZone": "Eastern Time (US & Canada)",
"translator": false,
"url": "https://t.co/mZB2hymxC9",
"urlentity": {
"displayURL": "https://t.co/mZB2hymxC9",
"end": "23",
"expandedURL": "https://t.co/mZB2hymxC9",
"start": "0",
"text": "https://t.co/mZB2hymxC9",
"url": "https://t.co/mZB2hymxC9"
},
"utcOffset": "-18000",
"verified": true,
"withheldInCountries": null
},
"userMentionEntities": [],
"withheldInCountries": null
}
}
]
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Top 5 Tweeting Days
After the basic queries are out of the way, let’s look at some interesting data now.
What are the top 5 days on which @realDonaldTrump tweeted and the tweet count?
Query:
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SELECT SUBSTR(MILLIS_TO_STR(TO_NUM(createdAt)), 0, 10) tweet_date,
COUNT(1) tweet_count
FROM twitter
GROUP BY SUBSTR(MILLIS_TO_STR(TO_NUM(createdAt)), 0, 10)
ORDER BY COUNT(1) DESC
LIMIT 5;
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Usual GROUP BY and ORDER BY SQL clauses perform the same function.
N1QL Functions apply a function to values. The createdAt field is returned a number as a String. TO_NUM function converts the String to a number. MILLIS_TO_STR function converts the String to a date. Finally, SUBSTR function extracts the relevant part of the date.
Results:
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[
{
"tweet_count": 13,
"tweet_date": "2017-01-17"
},
{
"tweet_count": 12,
"tweet_date": "2017-01-06"
},
{
"tweet_count": 11,
"tweet_date": "2016-12-04"
},
{
"tweet_count": 10,
"tweet_date": "2017-01-03"
},
{
"tweet_count": 10,
"tweet_date": "2017-01-04"
}
]
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Jan 17th, 2017 is the most tweeted day. Now, this result is of course restricted to the data from the JSON documents stored in the database.
Does anybody have a more comprehensive database of @realDonaldTrump tweets?
Tweet Frequency
OK, our database shows that that maximum number of tweets in a day were 13. How do I find out how many days @realDonaldTrump tweeted a certain number of times?
Query:
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SELECT a.tweet_count, count(1) days FROM (
SELECT SUBSTR(millis_to_str(to_num(createdAt)), 0, 10) tweet_date,
COUNT(1) tweet_count
FROM twitter
GROUP BY SUBSTR(millis_to_str(to_num(createdAt)), 0, 10)
) a
GROUP BY a.tweet_count
ORDER BY a.tweet_count DESC;
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This is easily achieved using N1QL nested queries.
Results:
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[
{
"days": 1,
"tweet_count": 13
},
{
"days": 1,
"tweet_count": 12
},
{
"days": 1,
"tweet_count": 11
},
{
"days": 2,
"tweet_count": 10
},
{
"days": 1,
"tweet_count": 9
},
{
"days": 7,
"tweet_count": 8
},
{
"days": 3,
"tweet_count": 7
},
{
"days": 7,
"tweet_count": 6
},
{
"days": 5,
"tweet_count": 5
},
{
"days": 5,
"tweet_count": 4
},
{
"days": 11,
"tweet_count": 3
},
{
"days": 3,
"tweet_count": 2
},
{
"days": 1,
"tweet_count": 1
}
]
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In 47 days, there is only one day with a single tweet. A sum total of tweet_count shows that there is no single day without a tweet 
Most Common Hour In a Day To Tweet
@realDonaldTrump is known to tweet at 3am. Let’s take a look what are the most common hours for him to tweet.
Query:
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SELECT SUBSTR(MILLIS_TO_STR(TO_NUM(createdAt)), 11, 2) tweet_hour,
COUNT(1) tweet_count
FROM twitter
GROUP BY SUBSTR(MILLIS_TO_STR(TO_NUM(createdAt)), 11, 2)
ORDER BY tweet_count DESC
LIMIT 5;
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Results:
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[
{
"tweet_count": 39,
"tweet_hour": "13"
},
{
"tweet_count": 27,
"tweet_hour": "12"
},
{
"tweet_count": 26,
"tweet_hour": "11"
},
{
"tweet_count": 20,
"tweet_hour": "14"
},
{
"tweet_count": 15,
"tweet_hour": "00"
}
]
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Now seems like the controversial tweets come at 3am. But 39 tweets are coming at 1pm ET, likely right after lunch and while having a dessert 😉
Common Day of The Week to Tweet
Let’s find out what are the most common day of the week to tweet.
Query:
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SELECT DATE_PART_STR(MILLIS_TO_STR(TO_NUM(createdAt)), "day_of_week") day_of_week,
COUNT(1) tweet_count
FROM twitter
GROUP BY DATE_PART_STR(MILLIS_TO_STR(TO_NUM(createdAt)), "day_of_week")
ORDER BY tweet_count DESC;
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DATE_PART_STR is a new function returns date part of the date. Further day_of_week attribute is used to get day of the week.
Results:
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[
{
"day_of_week": 2,
"tweet_count": 49
},
{
"day_of_week": 3,
"tweet_count": 40
},
{
"day_of_week": 0,
"tweet_count": 40
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