SQL Server Assignment Help | SQL Server Homework Help
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SQL Server Assignment Help
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What is SQL Server?
SQL SERVER is a relational database management system (RDBMS) developed by Microsoft. It is primarily designed and developed to compete with MySQL and Oracle database.
SQL Server consists of two main components:
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SQL Server Database Design Help(Hire Database Designing Expert)
What is SQL Server database design? Database Design is a collection of processes that facilitate the designing, development, implementation and maintenance of enterprise data management systems. Properly designed database are easy to maintain, improves data consistency and are cost effective in terms of disk storage space.
Why database design is important?
IIt helps produce database systems
That meet the requirements of the users
Have high performance.
SQL Server Database Modelling
Two database models used to design database: Logical Model, Physical Model
This stage is concerned with developing a database model based on requirements. The entire design is on paper without any physical implementations or specific DBMS considerations.
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SQL Server Database Implementation(Hire Expert for database Implementation)
In database implementation we have used below two methods:
Data conversion and loading - this stage of relational databases design is concerned with importing and converting data from the old system into the new database.
Testing - this stage is concerned with the identification of errors in the newly implemented system. It checks the database against requirement specifications.
ER Diagram(Hire Expert to create ER Diagram)
Entity Relationship Model (ER Modeling) is a graphical approach to database design. It is a high-level data model that defines data elements and their relationship for a specified software system. An ER model is used to represent real-world objects
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A database schema defines how the data is organised using the schema diagram. A schema diagram is a diagram which contains entities and the attributes that will define that schema. A schema diagram only shows us the database design.
Querying With SQL Server Database
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Other Important Areas which is handle by Us
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Advanced SQL Learning
Normalization of Queries
Databases In Which You Can Also Get Help
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PostgreSQL: PostgreSQL is an advanced, enterprise-class, and open-source relational database system. PostgreSQL supports both SQL (relational) and JSON (non-relational) querying. PostgreSQL is an advanced, enterprise-class, and open-source relational database system. PostgreSQL supports both SQL (relational) and JSON (non-relational) querying.
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Database Sample 1
The following tables form part of a database held in a Relational Database Management System:
Employee (empNo, eName, salary, position)
Aircraft (aircraftNo, aName, aModel, flyingRange)
Flight (flightNo, from, to, flightDistance, departTime, arriveTime)
Certified (empNo, aircraftNo)
where Employee contains details of all employees (pilots and non-pilots) and empNo is the key.
AirCraft contains details of aircraft and aircraftNo is the key.
Flight contains details of the flights and flightNo is the key.
and Certified contains details of the staff who are certified to fly an aircraft, and empNo/aircraftNo form the key.
Formulate the following queries in SQL:
List the employee numbers of employees who have the highest salary.
List the employee numbers of employees who have the second highest salary.
List the employee numbers of employees who are certified for exactly three aircraft.
Write code that will write Oracle sequences to produce automatic customer number and invoice number values. Start the customer numbers at 1000 and the invoice numbers at 5000.
Modify the CUSTOMER table to included two new attributes: CUST_DOB and CUST_AGE. Customer 1000 was born on March 15, 1979, and customer 1001 was born on December 22, 1988.
Consider a database with objects X and Y and assume that there are two transactions Tl and T2. Transaction T1 reads objects X and Y and then writes object X. Transaction T2 reads objects X and Y and then writes objects X and Y.
(a) Give an example schedule with actions of transactions T1 and T2 on objects X and Y that results in a write-read conflict.
(b) Give an example schedule with actions of transactions T1 and T2 on objects X and Y that results in a read-write conflict.
(c) Give an example schedule with actions of transactions T1 and T2 on objects X and Y that results in a write-write conflict.
Transaction 1 is the query
SELECT S.rating, MIN (S.age)
FROM Sailors S
WHERE S.rating = 8
Transaction 2 is the statement
UPDATE Sailors SET rating = 8
WHERE Name = 'John Doe'
What 'objects' should the DBMS lock when executing these transactions and why?
Consider the following schema:
Suppliers(sid: integer, sname: string, addTess: string)
Parts(pid: integer, pname: string, coloT: string)
Catalog(sid: integer, pid: integer, cost: real)
The Catalog relation lists the prices charged for parts by Suppliers. For each of the following transactions, state the SQL isolation level that you would use and explain why you chose it.
1. A transaction that adds a new part to a supplier's catalog.
2. A transaction that increases the price that a supplier charges for a part.
3. A transaction that determines the total number of items for a given supplier.
4. A transaction that shows, for each part, the supplier that supplies the part at the lowest price.
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