To exclude the first zero when using SQL Lag() and Diff calculation, you can add a filter condition to your query that excludes the first row. This can be done by adding a WHERE clause that filters the results based on the row number or timestamp. For example, you can modify your query to look like this:
SELECT date,
value,
COALESCE(value - LAG(value) OVER (ORDER BY date), 0) AS diff
FROM your_table
WHERE date > (SELECT MIN(date) FROM your_table)
ORDER BY date;
In this query, the WHERE clause excludes the first row by filtering results where the date is greater than the minimum date value in the table. This ensures that the first row is not included in the Lag() and Diff calculation.
Please start posting anonymously - your entry will be published after you log in or create a new account. This space is reserved only for answers. If you would like to engage in a discussion, please instead post a comment under the question or an answer that you would like to discuss
Asked: 2023-07-16 01:42:02 +0000
Seen: 10 times
Last updated: Jul 16 '23
How can data extraction from BigQuery and loading it into SQL Server be done in an optimal manner?
How can one ensure that sub-classes have uniform method parameters in TypeScript?
How can the calculation of matrix determinant be performed using CUDA?
How can code repetition be prevented when using (box)plot functions?
What steps can I take to prevent my webpage from slowing down when all parts of a div are displayed?
How can circles be detected in openCV?
What is the method to determine the most precise categorization of data using Self Organizing Map?