Incremental Load - Insert Only (No Update or Delete)
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- เผยแพร่เมื่อ 20 ก.ย. 2024
- Implement Incremental Load in Qlik.
Incremental load is a very common task in relation to data bases. It is defined as loading nothing but new or changed records from the database. All other data should already be available, in one way or another. With QVD files it is possible to perform incremental load in most cases.
The basic process is described below:
1. Load the new data from Database table (a slow process, but loading a limited number of records).
2. Load the old data from QVD file (loading many records, but a much faster process).
3. Create a new QVD file.
4. Repeat the procedure for every table loaded.
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Good explanation
Thank you
we need all ways of incremental hope you will post next yt
Sure
th-cam.com/video/LRyBaTtbR98/w-d-xo.html
Please create one complete dashboard .. waiting 🎉
You can refer to this playlist.
th-cam.com/play/PLxmjvkMH6h7dFFb4-ayd4CEEySRgcVk9H.html
Thank you. I'm using date time field from database for the incremental test. I got the max date time from the qvd and converted to timestamp, then tried the peek variable, and where clause in my sql query hit qlik keeps telling me error in converting date to text. I have the single quotes around the variable expansion. If I don't put it says maxdate field not found :/
First - declare the variable using LET statement and then expand or evaluate it using $ symbol, no single quotes required.
Second - As I did in video first make sure required date or timestamp in correct format similar to database is captured in variable. Then proceed with adding variable in where clause.
If you still have issues send me an email with more data and error snapshot.