Table 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 number ..

Table: Employee+-------------+------+| Column Name | Type |+-------------+------+| id | int || salary | int |+-------------+------+id is the primary key (column with unique values) for this table.Each row of this table contains information about the salary of an employee. Write a solution to find the second highest distinct salary from the Employee table. If there is no second hi..

Table: Users+----------------+---------+| Column Name | Type |+----------------+---------+| user_id | int || name | varchar |+----------------+---------+user_id is the primary key (column with unique values) for this table.This table contains the ID and the name of the user. The name consists of only lowercase and uppercase characters. Write a solution to fix the names..

Table: Employee+--------------+---------+| Column Name | Type |+--------------+---------+| id | int || name | varchar || salary | int || departmentId | int |+--------------+---------+id is the primary key (column with unique values) for this table.departmentId is a foreign key (reference column) of the ID from the Department table.Each row of this table in..

Table: Insurance+-------------+-------+| Column Name | Type |+-------------+-------+| pid | int || tiv_2015 | float || tiv_2016 | float || lat | float || lon | float |+-------------+-------+pid is the primary key (column with unique values) for this table.Each row of this table contains information about one policy where:pid is the policyholder's policy ID.tiv_20..

Table: RequestAccepted+----------------+---------+| Column Name | Type |+----------------+---------+| requester_id | int || accepter_id | int || accept_date | date |+----------------+---------+(requester_id, accepter_id) is the primary key (combination of columns with unique values) for this table.This table contains the ID of the user who sent the request, the ID of the..