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To write a cumulative or running multiplication function in Snowflake, you can use the EXP and LN functions to calculate the cumulative product across rows. Here's a simple example:
sql
WITH data AS (
SELECT $1 AS x
FROM values (1), (2), (3), (4), (5)
)
SELECT x, EXP(SUM(LN(x)) OVER (ORDER BY x)) AS cumulative_product
FROM data;
This will calculate the cumulative product of the x values. If you have a table with the x values, you can replace the WITH data AS (...) part with your table name and column. This approach uses the natural logarithm and exponentiation to achieve the cumulative multiplication.
If you prefer a more programmatic approach, you can also create a User-Defined Table Function (UDTF) to calculate the cumulative product.
These methods leverage the LN and EXP functions, as well as window functions, to achieve the cumulative multiplication in Snowflake
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