I want SQL query for above ERD Daigram

Below is when I tried to export ERD daigram to SQL server

CREATE TABLE [Entity] ( [Field] Type, [Field] Type, [Field] Type, [Field] Type );

CREATE TABLE [Entity] ( [Field] PK, [Field] Type );

CREATE TABLE [Entity] ( [Employee ID] Type, [Name] Type, [Address] Type, [Field] Type, [Field] Type, CONSTRAINT [FK_Entity.Name] FOREIGN KEY ([Name]) REFERENCES [Entity]([Field]) );

CREATE TABLE [Entity] ( [Field] Type, [Field] Type, [Field] Type, [Field] Type );

CREATE TABLE [Customer] ( [Customer ID] Integer, [FrstName] VarChar(25), [LstName] VarChar(25), [OrderID] VarChar(10), PRIMARY KEY ([Customer ID]) );

CREATE TABLE [Order] ( [OrderID] Integer, [CustomerID] Integer, [ProductID] Integer, PRIMARY KEY ([OrderID]) );

CREATE TABLE [Product] ( [ProductID] Integer, [Description] VarChar(25), [Quantity] VarChar(25), [OrderID] Integer, PRIMARY KEY ([ProductID]) );

CREATE INDEX [Key] ON [Product] ([OrderID]);