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"questionId": "1735",
"questionFrontendId": "1596",
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"title": "The Most Frequently Ordered Products for Each Customer",
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"similarQuestions": "[{\"title\": \"The Most Recent Orders for Each Product\", \"titleSlug\": \"the-most-recent-orders-for-each-product\", \"difficulty\": \"Medium\", \"translatedTitle\": null}]",
"exampleTestcases": "{\"headers\":{\"Customers\":[\"customer_id\",\"name\"],\"Orders\":[\"order_id\",\"order_date\",\"customer_id\",\"product_id\"],\"Products\":[\"product_id\",\"product_name\",\"price\"]},\"rows\":{\"Customers\":[[1,\"Alice\"],[2,\"Bob\"],[3,\"Tom\"],[4,\"Jerry\"],[5,\"John\"]],\"Orders\":[[1,\"2020-07-31\",1,1],[2,\"2020-7-30\",2,2],[3,\"2020-08-29\",3,3],[4,\"2020-07-29\",4,1],[5,\"2020-06-10\",1,2],[6,\"2020-08-01\",2,1],[7,\"2020-08-01\",3,3],[8,\"2020-08-03\",1,2],[9,\"2020-08-07\",2,3],[10,\"2020-07-15\",1,2]],\"Products\":[[1,\"keyboard\",120],[2,\"mouse\",80],[3,\"screen\",600],[4,\"hard disk\",450]]}}",
"categoryTitle": "Database",
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{
"name": "Database",
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"sampleTestCase": "{\"headers\":{\"Customers\":[\"customer_id\",\"name\"],\"Orders\":[\"order_id\",\"order_date\",\"customer_id\",\"product_id\"],\"Products\":[\"product_id\",\"product_name\",\"price\"]},\"rows\":{\"Customers\":[[1,\"Alice\"],[2,\"Bob\"],[3,\"Tom\"],[4,\"Jerry\"],[5,\"John\"]],\"Orders\":[[1,\"2020-07-31\",1,1],[2,\"2020-7-30\",2,2],[3,\"2020-08-29\",3,3],[4,\"2020-07-29\",4,1],[5,\"2020-06-10\",1,2],[6,\"2020-08-01\",2,1],[7,\"2020-08-01\",3,3],[8,\"2020-08-03\",1,2],[9,\"2020-08-07\",2,3],[10,\"2020-07-15\",1,2]],\"Products\":[[1,\"keyboard\",120],[2,\"mouse\",80],[3,\"screen\",600],[4,\"hard disk\",450]]}}",
"metaData": "{\n \"mysql\": [\n \"Create table If Not Exists Customers (customer_id int, name varchar(10))\",\n \"Create table If Not Exists Orders (order_id int, order_date date, customer_id int, product_id int)\",\n \"Create table If Not Exists Products (product_id int, product_name varchar(20), price int)\"\n ],\n \"mssql\": [\n \"Create table Customers (customer_id int, name varchar(10))\",\n \"Create table Orders (order_id int, order_date date, customer_id int, product_id int)\",\n \"Create table Products (product_id int, product_name varchar(20), price int)\"\n ],\n \"oraclesql\": [\n \"Create table Customers (customer_id int, name varchar(10))\",\n \"Create table Orders (order_id int, order_date date, customer_id int, product_id int)\",\n \"Create table Products (product_id int, product_name varchar(20), price int)\",\n \"ALTER SESSION SET nls_date_format='YYYY-MM-DD'\"\n ],\n \"database\": true\n}",
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"Create table If Not Exists Customers (customer_id int, name varchar(10))",
"Create table If Not Exists Orders (order_id int, order_date date, customer_id int, product_id int)",
"Create table If Not Exists Products (product_id int, product_name varchar(20), price int)",
"Truncate table Customers",
"insert into Customers (customer_id, name) values ('1', 'Alice')",
"insert into Customers (customer_id, name) values ('2', 'Bob')",
"insert into Customers (customer_id, name) values ('3', 'Tom')",
"insert into Customers (customer_id, name) values ('4', 'Jerry')",
"insert into Customers (customer_id, name) values ('5', 'John')",
"Truncate table Orders",
"insert into Orders (order_id, order_date, customer_id, product_id) values ('1', '2020-07-31', '1', '1')",
"insert into Orders (order_id, order_date, customer_id, product_id) values ('2', '2020-7-30', '2', '2')",
"insert into Orders (order_id, order_date, customer_id, product_id) values ('3', '2020-08-29', '3', '3')",
"insert into Orders (order_id, order_date, customer_id, product_id) values ('4', '2020-07-29', '4', '1')",
"insert into Orders (order_id, order_date, customer_id, product_id) values ('5', '2020-06-10', '1', '2')",
"insert into Orders (order_id, order_date, customer_id, product_id) values ('6', '2020-08-01', '2', '1')",
"insert into Orders (order_id, order_date, customer_id, product_id) values ('7', '2020-08-01', '3', '3')",
"insert into Orders (order_id, order_date, customer_id, product_id) values ('8', '2020-08-03', '1', '2')",
"insert into Orders (order_id, order_date, customer_id, product_id) values ('9', '2020-08-07', '2', '3')",
"insert into Orders (order_id, order_date, customer_id, product_id) values ('10', '2020-07-15', '1', '2')",
"Truncate table Products",
"insert into Products (product_id, product_name, price) values ('1', 'keyboard', '120')",
"insert into Products (product_id, product_name, price) values ('2', 'mouse', '80')",
"insert into Products (product_id, product_name, price) values ('3', 'screen', '600')",
"insert into Products (product_id, product_name, price) values ('4', 'hard disk', '450')"
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