store1 | ARCADE64 - MAME with working arcade games | Game Engine library

I have a DF that looks like this :

...

I have a list class called StoreList which is a list class with parameter List. StoreList variables are meant to be used with local storage package.

When I try to retrieve data from the local storage using the package, the package function returns type List. I want to convert that to List. How do I do that? My code is as follows:

...

I have an ASP.NET Core 5 MVC application which serves multiple sites using the ASP.NET Core Web Optimizer; e.g.,

...

I'm a bit new to SQL and would like to do some query on these tables. the schema looks like this:

tb1:

id date store_id sold_count abc 2000-01-01 10:00 store1 30 def 2000-01-02 12:00 store1 20 ghi 2000-01-01 13:00 store2 40 jkl 2000-01-01 17:00 store1 50

tb2:

id error_id error_type mno error1 error_type_A pqr error2 error_type_A stu error3 error_type_B vwx error4 error_type_B yz error5 error_type_B

tb3:

tb1_id tb2_id abc mno abc pqr def stu ghi vwx jkl yz

I want to do a query only for date 2000-01-01 and get a table like this:

Total_Sold Total_Error Error_Rate 120 4 0.0333

Does anyone know how I can achieve this?

...

Iwould like to do a query on three tables:

the schema looks like this:

(take a look at the db-fiddle)

tb1: id, store_id, product_count

id store_id product_count abc store1 10 def store1 20 ghi store2 50

tb2: id, product_id, product_type (A or B)

id product_id product_type jkl product1 A mno product2 A pqr product3 B stu product4 B vwx product5 B

tb3: tb1_id, tb2_id

tb1_id tb2_id abc jkl abc mno def pqr ghi stu ghi vwx

A store may have multiple products.

Now I would like to write a query and get a result like this:

store_id product_count_sum product_type_A_count product_type_B_count store1 30 (10 + 20) 2 1 store2 50 0 2

I tried the following query, but the product_count_sum is not correct, and it seems like there's an issue when I try joining the 3 table (duplicate rows for a single store). Do anyone know how can I change this query and make it work as expected?

...

I'm a bit new to SQL and would like to do some query on these tables. the schema looks like this:

tb1:

id store_id sold_count abc store1 30 def store1 20 ghi store2 50

tb2:

id error_id error_type jkl error1 error_type_A mno error2 error_type_A pqr error3 error_type_B stu error4 error_type_B vwx error5 error_type_B

tb3:

tb1_id tb2_id abc jkl abc mno def pqr ghi stu ghi vwx

I want to do a query and get a table like this:

Stats Error_Type_A Error_Type_B Raw_Count 2 3 Percentage 0.4 0.6 Error_Rate 0.02 0.03

• Raw_Count: count of A/B error in total (tb2)
• Percentage: percent of type A/B error (tb2)
• Error_Rate: count of type A/B error (tb2) / sum of sold_count (tb1)

Now my thought is to do this in 2 steps, first to get a cte table like this, and then transform column and row.

Error_Type Raw_Count Percentage Error_Rate Error_Type_A 2 0.4 0.02 Error_Type_B 3 0.6 0.03

Here is the sql I wrote, but seems not working:

...

I'm pretty new to SQL and got a table like this:

store_id product_count store1 50 store1 30 store2 20

I want to query for percentage of product_count for each store, so the result should be like:

store_id product_count_sum percentage store1 80 (50 + 30) 80% store2 20 20%

I tried this code, but it didn't work (shows 0 on percentage):

...

Would need help merging two objects. Both are downloaded from Firebase Firestore in a mobile application.

...

I have the following dataframe:

...