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…
i have a 3 tables rentals table,unit sizes tables and rental_units_pivot table.the rentals table contains the details of a rental,the unit sizes table contains a list of the units sizes such as i bedroom,2 bed room,etc.A rental facility might have…
I am attempting to join 2 tibbles (dplyr::inner_join) based on a UUID column in each. Oddly, instead of the expected one-to-one relationship, the join produces a many-to-many relationship (as stated in a warning message and also indicated by the resulting…
I'm trying to figure out how to perform a pretty complex join on 2 tables that satisfy multiple rules. I'm using mysql 8. Here is some sample SQL to work with: create table person ( id integer primary key name…
I am not sure on how to begin optimizing this High Latency SQL query that my platform runs. Other than reducing the datasets, what are some things that I can do? SELECT ctm.* FROM compound_transaction_map ctm JOIN bustransaction_map btm ON…
I have attendance table like this: Employee Date_Time Status std001 2024-02-01 22:01:00 IN std001 2024-02-02 06:00:05 OUT std001 2024-02-03 07:59:00 IN std001 2024-02-03 17:00:00 OUT std001 2024-02-04 06:00:00 IN std001 2024-02-04 14:00:00 OUT I want to select the table above…
I have four tables: supplies, stocks, stock_ins, and stock_outs. In the Stock controller, I want to sum the total stock_out for each supply . For this, I have used the following query: $supplies = Stock::select( 'supplies.name', 'stocks.supply_id', 'stocks.id', 'stocks.stock', 'stock_ins.quantity…
Let's say I have a table containing cities with their populations and a table containing buildings of different types. I want to know the percentage of people living in cities containing schools. Cities: name pop A 10 B 100 C…
The Problem To set the scene, I work on a PHP Laravel system that has taken a drupal-style approach where every field is its own MySQL table. Every table has optimum indexing making it very quick to fetch data for…