Database Programming

View is a virtual table with no data of its own, but can be operated like any other table. It is like a window through which you can view data of another table, which is called the base table. syntax: CREATE VIEW table_name as SELECT statement ;

The Composite Entity design pattern offers a solution to modeling a networks of interrelated business entities. The composite entity's interface is coarse-grained, and it manages interactions between fine-grained objects internally. This design pattern is especially useful for efficiently managing relationships to dependent objects.

enter data, and search data

weak entity

You will lose the connection between the tables and break the relationship.

Yes

Performance Report.

When a Database Management System (DBMS) flags a deleted record, it typically marks the record as deleted without physically removing it from the database. This process allows the system to reclaim space later during maintenance operations, such as a vacuuming or compaction process. Flagging also allows for potential recovery of the record if needed, maintaining data integrity and consistency. Ultimately, the flagged record remains accessible for certain operations until it is permanently purged from the database.

advantage and disadvantage of intelligent agents

Guardium for Mainframe is the only database auditing solution that provides 100% visibility into mainframe database activity without impacting business processes.

admin and employee

DBMS utilities

i need data flow diagram for redbus.in

Cascade the delete

Value Property

Some telephone numbers starts with number 0 (zero) or the country code with + marks (If you type the full number properly). For instance a number like 0094111234567 or +94111234567. If this number is stored under the "Number" data type, two things can happen.

1. Default "Number" field does not support this size of data. You have to change the Filed Size to "Double" in order to accommodate this telephone number.

2. Zero (0) in the front will get removed automatically!

So To prevent these issues you can use the data type as "Text"

Hope this Helps!

It depends on what you want to do. Both are useful to learn and know about. Knowing either one of them would enable you to do lots of things. Knowing something about both of them would be even better.

Data Integrity

Relational tuple calculus has its variables range over tuples, where domain relational calculus ranges its variables over the field values, or domain elements. Both types of calculus are subsets of first order logic.

They are not both "analytical", but "substantive" and "analytical". Substantive procedures are reviews of documents for a "substantial portion" of account activity, while analytical procedures includ controls test and test relying on mathematical relationships reflectinb accounting mecvhanics, contractual provisions [debt times interest rate], or business capabilities [production per machine hour or day].

When you architect an application that utilizes a single database rather than splitting responsibilities or rolls between two or more databases. Such division can be useful in providing a stronger isolation level and a more clear delineation in the development process.

dont know.u tell

A table relationship is where a field in one table is matched with the same field in another table. For example you may have a table that lists your suppliers so 'Supplier Name' is one of the fields, you may then have another table that lists orders made so "Supplier Name" will be a field in that table also. Therefore you can link the two tables together so that all specific supplier address details are linked to subsequent orders with that supplier. For a relationship to work both linking fields must be of the same data type, therefore you can't link a field that is stated as text with one that is stated as a date. Relationships are commonly known as one-to-one and one-to-many, in a one-to-one relationship the field's contents can only appear once on each side so using the example above one supplier in the suppliers table can only have one order record in the orders table. "One to many" therefore means that one supplier can appear on many orders. Hope this helps.

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