Pandas

문제Table: Users+--------------+---------+| Column Name | Type |+--------------+---------+| account | int || name | varchar |+--------------+---------+account is the primary key (column with unique values) for this table.Each row of this table contains the account number of each user in the bank.There will be no two users having the same name in the table. Table: Transactions+..

문제Table: Visits+-------------+---------+| Column Name | Type |+-------------+---------+| visit_id | int || customer_id | int |+-------------+---------+visit_id is the column with unique values for this table.This table contains information about the customers who visited the mall. Table: Transactions+----------------+---------+| Column Name | Type |+----------------+---------..

문제Table: Patients+--------------+---------+| Column Name | Type |+--------------+---------+| patient_id | int || patient_name | varchar || conditions | varchar |+--------------+---------+patient_id is the primary key (column with unique values) for this table.'conditions' contains 0 or more code separated by spaces. This table contains information of the patients in the hospital.Writ..

문제Table: Users+---------------+---------+| Column Name | Type |+---------------+---------+| user_id | int || name | varchar || mail | varchar |+---------------+---------+user_id is the primary key (column with unique values) for this table. This table contains information of the users signed up in a website. Some e-mails are invalid.  Write a solution to find the..

문제Table Activities:+-------------+---------+| Column Name | Type |+-------------+---------+| sell_date | date || product | varchar |+-------------+---------+There is no primary key (column with unique values) for this table. It may contain duplicates. Each row of this table contains the product name and the date it was sold in a market.  Write a solution to find for each date the num..

문제Table: Users+---------------+---------+| Column Name | Type |+---------------+---------+| id | int || name | varchar |+---------------+---------+id is the column with unique values for this table. name is the name of the user. Table: Rides+---------------+---------+| Column Name | Type |+---------------+---------+| id | int || user_id | i..

문제Table: Products+------------------+---------+| Column Name | Type |+------------------+---------+| product_id | int || product_name | varchar || product_category | varchar |+------------------+---------+product_id is the primary key (column with unique values) for this table. This table contains data about the company's products.Table: Orders+---------------+---------+| C..

문제Table: Students+---------------+---------+| Column Name | Type |+---------------+---------+| student_id | int || student_name | varchar |+---------------+---------+student_id is the primary key (column with unique values) for this table. Each row of this table contains the ID and the name of one student in the school.Table: Subjects+--------------+---------+| Column Name | Type ..

문제Table: Prices+---------------+---------+| Column Name | Type |+---------------+---------+| product_id | int || start_date | date || end_date | date || price | int |+---------------+---------+(product_id, start_date, end_date) is the primary key (combination of columns with unique values) for this table. Each row of this table indicates the price of the pro..

문제Table: Queries+-------------+---------+| Column Name | Type |+-------------+---------+| query_name | varchar || result | varchar || position | int || rating | int |+-------------+---------+This table may have duplicate rows. This table contains information collected from some queries on a database. The position column has a value from 1 to 500. The rating column has a ..