SQL 查询以显示已购买某些特定产品的客户姓名

Question

这些是我创建并相应插入值的表：

CREATE TABLE Customer
(
     Customer_Id INTEGER IDENTITY (1,1) PRIMARY KEY,
     Customer_Name VARCHAR(30) NOT NULL
)

CREATE TABLE Product
(
     Product_Id INTEGER IDENTITY (1,1) PRIMARY KEY,
     Product_Name VARCHAR(30)
)

CREATE TABLE Product_Purchase
(
     Purchase_Id INTEGER IDENTITY (1,1) PRIMARY KEY,
     Product_Id INTEGER NOT NULL,
     Customer_Id INTEGER NOT NULL
 )

INSERT INTO Customer (Customer_Name)
VALUES ('Sandip'), ('Ankit'), ('Ashok'), ('Raj')

INSERT INTO Product (Product_Name)
VALUES ('Milk'), ('Egg'), ('Butter'), ('Paneer'), ('Curd')

INSERT INTO Product_Purchase (Product_Id, Customer_Id)
VALUES (4, 1), (1, 1), (3, 1)
       (4, 2), (1, 2), 
       (4, 3), (3, 3), (1, 3),
       (1, 4), (2, 4), (3, 4), (4, 4)

所以我有 3 个表 Customers、Product 和 Product_Purchase 插入了值。

现在我想要只购买（牛奶、黄油和芝士）的客户列表。

All purchased items

Answer 1

准确购买（牛奶、黄油和芝士）的客户名单：

select cu.Customer_Name
 from Customer as cu inner join dbo.Product_Purchase as pu
 on pu.Customer_Id =cu.Customer_Id 
 where cu.Customer_Id not in 
 (select distinct pu.Customer_id  from  dbo.Product as pr inner join dbo.Product_Purchase as pu on pr.Product_Id=pu.Product_Id where Product_Name not in ('Milk', 'Butter','Paneer'))
 group by  cu.Customer_Name
 having count(pu.Product_id)=3

Answer 2

select customer_name
from Customer C, Product_Purchase PP, Product P
where C.Customer_Id = PP.Customer_Id
and   PP.Product_Id = P.Product_Id
and   Product_name in ('Milk', 'Butter', 'Paneer');

SQL 查询以显示已购买某些特定产品的客户姓名

SQL query to display names of customers who have purchased some particular products

sql

database

sql-server

relational-database