I want the solution like each item id all messages between sender and receiver and need all rows belongs to user i.e. if sender id = 3 and receiver id = 25 then it will list out all message of…
I'm using MySQL database. I have to join two tables (A, B). They have relationship (N->N). Actually, A is chatting room table and B is chat (chat record). Chatting room has many chats. If a user enters chat app, the…
Below is the database base snippet of the database that I am currently working on. Table transactions: id reference_table reference_field reference_id created_at 1 online_recharges online_recharge_id 10 2024-01-31 2 online_recharges online_recharge_id 11 2024-03-03 3 wallet_deductions wallet_deduction_id 10 2024-02-01 ... ... ...…
I have two tables 'poolTemp' and 'weather'. Both tables contain the columns "timeStamp" and "tempC". I want to join the tables with both "tempC" but only when poolTime.timeStamp is within 5 minutes of weather.timeStamp poolTemp.timeStamp data is recorded up to…
I'm looking for efficient strategies to optimize a MySQL query that generates Cartesian products in scenarios involving large data sets. The specific use case involves pairing cast and crew members for each movie in a database, which can result in…
I would like to select all active categories and view it with a breadcrumb. In my database I have the following: id_category category_name velleman_id velleman_parent prestashop_category prestashop_category_2 prestashop_category_3 prestashop_category_4 deleted 1 Car & Bike 10 0 2 Bike 10.10 10…
My JOIN does not work. The data stays NULL Hi, this is my first question, so please be nice. Think twice before hitting the "minus" button. 1/ I have a volatility AS bv table with he following fields: bv.Ticker bv.Vol_ref…
I have a main table, Table 1, that includes columns for student ID and some other info. There is also Table 2 which includes columns for student ID, survey question, and response. Essentially, I want to append Table 2 to…
If I have query SELECT FNAME, CNAME FROM FACULTY F, COURSES C WHERE F.FID=C.FID AND COURSES.FID='F04'; so can i use COURSES.FID or once alias is there I should use only that. though I am getting error if I am using…
if have these tables : orders(amount,unit_price,child_amount,child_price,service_id,issue_date,is_success) pools(name,for_view) services(id,pool_id) when i run this sql : SELECT SUM(orders.amount) AS totalAmount, SUM(orders.unit_price) AS totalPrice, SUM(orders.amount*orders.unit_price) AS total, SUM(orders.child_amount) AS totalAmountC, SUM(orders.child_price) AS totalPriceC, SUM(orders.child_amount*orders.child_price) AS totalC, pools.name, pools.for_view FROM orders INNER JOIN services…