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.
Tag: mysql-8.0
Trying to update a table in mysql 8.0 using ROW_NUMBER fails within the subquery
I am trying to update a table in my database using ROW_NUMBER in mysql. Table stats: id value value_rank ——————————- 1 635550348443 NULL 2 615342703162 NULL …
JOIN with 3 tables, and MAX value for a column combination
I have 3 tables with name USER, SCORE and LEVEL as given below. From these tables, I’m trying to prepare a scoreboard, in which each user will be arranged based on their level, and score. And for each user, only highest level and corresponding highest score in that level will be shown. I have written a JOIN query as below
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
Overlap the intervals using mysql
+——+————+————+ | id | start_date | end_date | +——+————+————+ | 1 | 2019-01-01 | 2019-01-12 | | 1 | 2019-01-10 | 2019-01-27 | | …
How to calculate count of each value in MySQL JSON array?
I have a MySQL table with the following definition: mysql> desc person; +——–+———+——+—–+———+——-+ | Field | Type | Null | Key | Default | Extra | +——–+———+-…
Is there a way to calculate total breaks time in between first_check_in and last_check_out?
MySQL version is 8.0.16 I want to obtain the total break time for a given date the table is as follows: id | employee_id | check_in | check_out ——————————-…
“group by desc” syntax error on mysql 8.0 which is fine on 5.7
The statement is like SELECT * FROM db.table group by id desc; Would raise an error like 15:02:24 SELECT * FROM db.table group by id desc LIMIT 0, 10 Error Code: 1064. You have an error in …
Select consecutive rows under a certain value in MySQL
Selecting consecutive rows with a column under a certain value I have a table with the following data: crashID crash ———————– 1 189 2 144 3 8939 …