Fill in missing dates
I am needing to find a way to fill in some missing dates. My data looks like this.
Project Start Date End Date
Project 1 4/1/2020 5/1/2020
Project 2 4/10/2020 6/1/2020
I want to make a new rows for every date between the start and end date. I saw some way to do this with R but I am not familiar with R.
Best Answer
-
SQL TO THE RESCUE. Use a JOIN on BETWEEN.
SELECT
t.*
dd.date
FROM date_dim dd
JOIN transactions t
ON
dd.date betweent t.startDate and t.endDate
EDIT:: can't remember if mySQL supports BETWEEN
SELECT
t.*
dd.date
FROM date_dim dd
JOIN transactions t
ON
dd.date >= t.startDate and
dd.date < t.endDate
Jae Wilson
Check out my 🎥 Domo Training YouTube Channel 👨💻
**Say "Thanks" by clicking the ❤️ in the post that helped you.
**Please mark the post that solves your problem by clicking on "Accept as Solution"1
Answers
-
SQL TO THE RESCUE. Use a JOIN on BETWEEN.
SELECT
t.*
dd.date
FROM date_dim dd
JOIN transactions t
ON
dd.date betweent t.startDate and t.endDate
EDIT:: can't remember if mySQL supports BETWEEN
SELECT
t.*
dd.date
FROM date_dim dd
JOIN transactions t
ON
dd.date >= t.startDate and
dd.date < t.endDate
Jae Wilson
Check out my 🎥 Domo Training YouTube Channel 👨💻
**Say "Thanks" by clicking the ❤️ in the post that helped you.
**Please mark the post that solves your problem by clicking on "Accept as Solution"1 -
@jaeW_at_Onyx I am currently in an ETL with a few other manipulations so I am trying to keep it in there. I was able to get it working with python!
0 -
Fair enough, if you must use Python do it.
If it were me, i would have an ETL where i do the 'easy transformations' in magic, and then a second ETL where i change the granularity of the data to one row per day.
WHY?
1) changing granularity is probably a requirement specific to a dashboard requirement. Whereas, a cleaned-up version of the data at one row per project would be valuable in many places.
2) i would avoid Python if possible b/c it's harder to support, it's a premium feature AND data transfer in and out of Python is comparable to data transfer in and out of MySQL.
Jae Wilson
Check out my 🎥 Domo Training YouTube Channel 👨💻
**Say "Thanks" by clicking the ❤️ in the post that helped you.
**Please mark the post that solves your problem by clicking on "Accept as Solution"0
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