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Author: eddahbarasa

Mission 3 Grouping Data.sql

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+create database luckyshrub_db;
+
+use luckyshrub_db;
+
+create table Orders(OrderID int, Department varchar(100), OrderDate date, OrderQty int, OrderTotal int, 
+primary key (OrderID));
+
+insert into Orders values (1,'Lawn Care','2022-05-05',12,500),(2,'Decking','2022-05-22',150,1450),
+(3,'Compost and Stones','2022-05-27',20,780),(4,'Trees and Shrubs','2022-06-01',15,400),
+(5,'Garden Decor','2022-06-10',2,1250),(6,'Lawn Care','2022-06-10',12,500),(7,'Decking','2022-06-25',150,1450),
+(8,'Compost and Stones','2022-05-29',20,780),(9,'Trees and Shrubs','2022-06-10',15,400),
+(10,'Garden Decor','2022-06-10',2,1250),(11,'Lawn Care','2022-06-25',10,400), 
+(12,'Decking','2022-06-25',100,1400),(13,'Compost and Stones','2022-05-30',15,700),
+(14,'Trees and Shrubs','2022-06-15',10,300),(15,'Garden Decor','2022-06-11',2,1250),
+(16,'Lawn Care','2022-06-10',12,500),(17,'Decking','2022-06-25',150,1450),(18,'Trees and Shrubs','2022-06-10',15,400),
+(19,'Lawn Care','2022-06-10',12,500),(20,'Decking','2022-06-25',150,1450),(21,'Decking','2022-06-25',150,1450);
+
+-- Task 1: group all records that have the same order date.
+select OrderDate from Orders group by OrderDate;
+
+-- Task 2: retrieve the number of orders placed on the same day.
+select OrderDate, COUNT(OrderID) from Orders group by OrderDate;
+
+-- Task 3: retrieve the total order quantities placed by each department.
+select Department, sum(OrderQty) from Orders group by Department;
+
+-- Task 4: retrieve the number of orders placed on the same day between the following dates:
+--  1st June 2022 and 30th June 2022.
+select OrderDate,COUNT(OrderID) from Orders group by OrderDate 
+having OrderDate between '2022-06-01' and '2022-06-30';

Mission 4 MySQL REPLACE statement.sql

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+create database Lucky_Shruby;
+use Lucky_shruby;
+create table Orders (OrderID int not null primary key, ClientID varchar(10), ProductID varchar(10), Quantity int, 
+Cost decimal(6,2));
+
+insert into Orders (OrderID, ClientID, ProductID, Quantity, Cost) values (1, "Cl1", "P1", 10, 500), 
+(2, "Cl2", "P2", 5, 100), (3, "Cl3", "P3", 20, 800), (4, "Cl4", "P4", 15, 150), (5, "Cl3", "P3", 10, 450), 
+(6, "Cl2", "P2", 5, 800), (7, "Cl1", "P4", 22, 1200), (8, "Cl1", "P1", 15, 150);
+
+-- Task 1: Write a SQL REPLACE statement that inserts two new orders 
+replace into Orders (OrderID, ClientID, ProductID, Quantity, Cost) values (9, "Cl1", "P1", 10, 5000), 
+(10, "Cl2", "P2", 5, 100);
+
+-- Task 2: change a record
+replace into Orders set OrderID = 9, ClientID = "Cl1", ProductID = "P1", Quantity = 10, Cost = 500;

Mission 5 Working with constraints.sql

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+create database Mangata_Gallo;
+use Mangata_Gallo; 
+
+-- Task 1: Create the Clients table with the required constraints
+create table Clients (ClientID int primary key, FullName varchar(100) not null, PhoneNumber int not null unique);
+show columns from Clients;
+
+-- Task 2: Create the Items table with the required constraints:
+create table Items (ItemID int primary key, ItemName varchar(100) not null, Price decimal(5,2) not null);
+show columns from Items;
+
+-- Task 3: Create the Orders table with the required constraints
+create table Orders ( OrderID int primary key,  ItemID int not null,ClientID int not null, 
+Quantity int not null check (Quantity < 4),Cost decimal(6,2) not null, foreign key (ClientID) references Clients (ClientID), 
+foreign key (ItemID) references Items (ItemID));
+show columns from Orders;