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Tag: mysql-8.0

Getting values from the first row, last row, and an aggregation in MySQL Window function

For a marketing related analysis I need to provide data on the first- and last-touchpoint and of the number of total interactions with our website. A simplified version of our interaction table looks like this: Our current approach looks like this: Currently, we observe that the runtime scales approximately linear with our data, which will become infeasible to compute soon.

mysql Cumulative sum for each unique ID in each sale:

I have trouble adding and accumulating my amounts per id, I use this solution but it doesn’t work and it adds up all the ids, I use this: any solution? ineed this For version 5.7 ? Answer You can use a SELECT statement containing window analytic function instead of an UPDATE statement : acumulado column shouldn’t need to be stored

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