SQL Fiddle: In the table above the purchasing process for different campaigns is displayed using an Event_Type and a Quantity that applies to the Event_Type. Every campaign can only have each Event_Type once. Now, I want ot get the Quantity of the latest available status within the purchasing process for each…
Tag: sql
Get the average of values in every specific epoch ranges in unix timestamp which returns -1 in specific condition in MySQL
I have a MySQL table which has some records as follows: I want to compute the average for every 10 epochs to see the following results: I saw some similar answers like enter link description here and enter link description here and enter link description here but these answers are not a solution for my specif…
Laravel 6 many to many relationship
In laravel 6, I have 2 models I have third model to join tables Now how can I get all the teachers those are not subscribed by a particular student? For example: Teacher1, Teacher2, Teacher3, Teacher4 are in the Teacher table and Student1, Student2, Student3, Student4 are in the Student table Student1 subscri…
How to convert an SQL Output to a python list [closed]
Closed. This question needs details or clarity. It is not currently accepting answers. Want to improve this question? Add details and clarify the problem by editing this post. Closed 2 years ago. Improve this question So basically I have an SQL database with 5 different columns of data. what I am trying to do…
How to grant permissions in Postgres on tables that start with parcel?
Answer GRANT takes only fixed table names (or list of tables). What you want require dynamic SQL, ie dynamically building a statement and executing it in an anonymous block. Consider:
Copy result of select statement into a local database table
I would like to copy the contents of a remote DB query into a local database table. What would be the best way to do this? Currently I’m trying something like: The first part of the command works fine to grab the data — the second part I’ve just added as a sort of pseudo-code to show what I&…
Concatenating variables into a string for a query url
I am trying to program a dynamic url that changes as the day changes. I can get the query to run if I hardcode the date into the string but it will not run when “todaysDate” is used at the end of the url. I looked in the locals window and the variable url returns the correct string needed to
How to get top N rows with some conditions
I have a query something like this: But now, I want to see the top 10 product_id for each site and category_id based on the clicks. When I write the LIMIT function, it only shows the top 10 products but it does not group it by category_id and shop_id. How can I do this? Answer Use window functions. You can
I’m trying display severeal lines from a database in NetBeans, but only one line appears
I’m currently having to do a code where, when ran, connects to a database and displays all the grades of a student after putting in their appropriate SSN. The main obstacle I’m running into is that once I put in the SSN it’ll only bring one of the grades rather than all. Is there something w…
postgresql ERROR: syntax error at or near “PRIMARY”
I’m new to PostgreSQL. I’ve been trying to create tables in a database but some queries give weird errors. the first snippet throws a syntax error but when I add “serial” on the problematic column the error is resolved. Should all primary keys auto-increment in PostgreSQL? This works a…