Dataview query to count the occurrence of an item

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What I’m trying to do

In my daily notes file I keep track of activities I do each day (0=No, 1=Yes). I would like to create a habit tracker query to add up how many consecutive days I have done an activity over the last 90 days. i.e. add up successful days until there is a zero, at which point the counter should be reset to zero and start counting subsequent successful days

[Daily Notes File]
Exercise:: 0
Reading:: 1

Things I have tried

So far I have managed to create a query that adds up the total number of activities for the last 90 days, but I am unsure how to limit it to only a total of consecutive days.

TABLE Streak  
FROM "07 Planner/07.1 Daily"
WHERE <= date(now) AND >= date(now) - dur(90days)
FLATTEN Reading as ReadingTotal 
WHERE Reading 
GROUP BY ReadingTotal
FLATTEN length(rows.ReadingTotal) as Streak

Getting consecutive streaks you’ll need to process the result rows in a row by row base.

This is hard to do (if at all possible) in an ordinary DQL query, but it shouldn’t be too hard using dataviewjs, with either a for loop or some clever use of reduce.

Ok here is my best attempt (new to Javascript) but it does not return any data.

I can use this simple query to return all pages that have Reading::1 - this works fine

dv.list( dv.pages('"07 Planner/07.1 Daily"') .where(row => row.Reading == 1) )

However when I try to count the number of consecutive days it returns nothing.

let pages = dv.pages('"07 Planner/07.1 Daily"').where(row => row.Reading == 1);
let count = 0;
let currentDate = null;

for (let page of pages) {
    let pageDate = new Date(page.file.mtime);
    let pageDateString = pageDate.toISOString().split('T')[0];
    if (currentDate !== pageDateString) {
        currentDate = pageDateString;


Anyone have any tips where I am going wrong - besides trying to teach myself Javascript

Ok this is what I settled on - i n case it is of any use to anyone else

const pages = dv.pages('"07 Planner/07.1 Daily"').where(row => row.Reading == 1).map(row =>;

// Assuming the file names contain date and are in format 'YYYY-MM-DD'
// Sort the pages by date

let currentStreak = 1; // Start with 1 as we'll be counting the most recent day first

for (let i = pages.length - 1; i > 0; i--) { // Start from the last date and go backwards
    const currentDate = new Date(pages[i]);
    const previousDate = new Date(pages[i - 1]);

    const differenceInDays = (currentDate - previousDate) / (1000 * 60 * 60 * 24); // Difference in days

    if (differenceInDays === 1) {
    } else {
        break; // The moment we find a break in the current streak, we exit the loop

dv.header(2, `Current streak of Reading is: ${currentStreak} days`);

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