Total Transactions
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Write a query to get the cost of all transactions by user ordered by total cost descending.
Example:
Input:
transactions table
| Column | Type |
|---|---|
id |
INTEGER |
user_id |
INTEGER |
created_at |
DATETIME |
product_id |
INTEGER |
quantity |
INTEGER |
products table
| Column | Type |
|---|---|
id |
INTEGER |
name |
VARCHAR |
price |
FLOAT |
users table
| Column | Type |
|---|---|
id |
INTEGER |
name |
VARCHAR |
created_at |
DATETIME |
Output:
| Column | Type |
|---|---|
name |
VARCHAR |
user_id |
INTEGER |
total_cost |
FLOAT |
Note: Round the total cost to 2 decimal places.
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