draw ERD ( ER diagram )

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Design database schema and create database user pointOfSal that contain database schema tables with itsrelated relationships and database constraints

2) Grant the pointOfSal user all privileges that needed by database designer and developer to create database schema

3) The system must contain tables such as category(catNo,catogeryName) ,Items(itemNo,ItemName,Price,total_quantity, catNo),Items_stor_entry(entry_no number primary key,itemNo,entry_date ,quantity),

Employee (employeeNo,employeeName,job) ,branch(No,Name), Customer(customerNo,costomerName,gender) ,

,Invoice (employeeNo,customerNo,total price ,invoiceNo,InvoiceDate,branchNo )

InvoiceDeatail contain List Of Purchase Items contain detail information related to the invoice (invoiceNo,ItemNo, paidPrice, quantity) . create getItemTotalPrice function which to return quantity*paidPrice .