C++ :Sumita arora solutions for SQL chapter

designed for flexibility, and would typically include many more attributes, even if some of them are blank for many of

- Tables are useful in showing relationships and making comparisons. They should have title, row, column headings, population, source and explanations.

Unique Column and Table Names: A column name within the table is unique because it is referenced by its table name. RDBMS does not restrict other tables to use same column names because they are identified by their table. Similarly table names within a database needs to be

Without using table headers then are unable to tell what the information under them is related to. It makes for a very clear and concise table that is clearly labelled and neat and tidy.

Database interface's SQL editor provides an easy and efficient way to write and test scripts and queries. And its powerful data grid provides an easy way to view and edit data related to any DBMS/RDBMS tools.

Logical data independence is the ability to change logical schema without changing external schema or user view. In simple words, format used for data storage and format used for data presentation are independent. Such modifications include adding an attribute in existing table or adding a relationship between existing

A Table is where you are organised and store data so you have to create the table before store any data. By creating table, you need to define few things, Fields name, Data type, and the Description.

31) SQL views are updatable when the view is based on a single table with no computed columns, and all non-null columns are present in the view.

When it comes to the data model, there exists a relationship that has three different representations for the reason that database requires the relationship between the tables. It goes hand-in-hand with one another without the relationship the tables would have no purpose. The information cannot be repetitive in order for the each table to work and provide the specific database that is related to the information. In different ways the tables in the Huffman Trucking Fleet Truck database

Choosing specific columns from a database through a SELECT statement is known as projection. _________________________

The example discussed above on Customers table and Orders table is a one-to-many relationship. As each customer places multiple orders, each order only belongs to one customer. When creating a relationship between two tables, if only one of the related fields is unique, a one-to-many relationship is automatically set.

Giving the situation, Castle’s Family Restaurant will benefit best from a payroll HRIS. Most of the payroll HRIS software on the market organizes and simplifies some form of payroll processing. Payroll is initiated by the employee who begins to keep track of time spend on certain activities. A report is generated through some sort of software or web application that reflect these activities, although some activities are being recorded on hand written forms that then have to be transcribed into a computer. One of the benefits of a payroll system is that it will also conduct necessary accounting and may even print out checks.

Suppose that you have designed a database for Marcia's Dry Cleaning that has the following tables:

Firstly an entity is basically an entity of significance which data must be captured; also there are some examples of entities such as stock supplier and order. Furthermore in relational databases every entity is usually kept in a separate table. Also I have to make sure that put the employee details,

What is database management system? Database Management System is a database program. The DBMS manage incoming data, organize it, and provided ways for the data to be modified or extract by users or other programs. This cause, most database software comes with an Open Database Connectivity (ODBC) driver that allows the database to integrate with other databases. For example, common SQL statements such as SELECT and INSERT are translated from a program's proprietary syntax into a syntax other databases can understand. Some DBMS examples include PostgreSQL, MySQL, SQL Server, Microsoft Access, Oracle, FileMaker, RDBMS, dBASE, Clipper, and FoxPro. It is a software system that uses a standard method of retrieving, and running queries on data.