dBm is decibel power unit referenced to 1 milliwatt. Look at the related links for conversion: voltage to dBm, dBu, and dBV.
DataBase Management System (DBMS) is a software package that allows data to be effectively stored, retrieved and manipulated and the data stored in a DBMS packege can be ac…cessed by multiple users and by multiple application programs like (SQL Server, Oracle, Ms-Access) ..
it is the power ratio in decibels No, it isn't. dB on its own is a ratio. But when dB has a suffix, the figure is an absolute measurement, not a ratio. For instance, d…Bm is a measurement of power compared to 1mW. 0dBm means zero difference between 1mW and the measured figure. In other words the measured figure is also 1mW. 3dBm is 3dB greater than 1mW. -3dB is 3dB less than 1mW. etc. Another suffix is W. 0dBW being 1 watt. There are many more suffixes, some of which are used in only a few specialised cases.
A database management system ( DBMS ) is a software package with computer programs that controls the creation, maintenance, and use of a database. It allows organizations to… conveniently develop databases for various applications. A database is an integrated collection of data records, files, and other objects. A DBMS allows different user application programs to concurrently access the same database. DBMSs may use a variety of database models, such as the relational model or object model, to conveniently describe and support applications. It typically supports query languages, which are in fact high-level programming languages, dedicated database languages that considerably simplify writing database application programs. Database languages also simplify the database organization as well as retrieving and presenting information from it. A DBMS provides facilities for controlling data access, enforcing data integrity, managing concurrency control, and recovering the database after failures and restoring it from backup files, as well as maintaining database security.
\nIf I understand your question you are asking what a JOB is in say Sql Server 2000?\n. \nA job, or the job component in SQL server is basically an engine that allows you to …schedule objects to fire.\n. \nAs an example lets say you have a stored procedure that is setup to retrieve data from a table or set of tables, analyze it and split this data off into new tables, perhaps with additional information added, and maybe even delete some of the records that fit within certain rules.\n. \nThat said now you don't want to have to go and execute (run) this stored procedure on your own, manually; do you?\n. \nNow you can setup a job that you will assign a schedule to (ie: Run every few minutes, every hour, once a day, whatever you want). And in this JOB or schedule you will attach this stored procedure.\n. \nThe SQL engine looks at the scheduled jobs, compares the last run time with when it is set to run again and then fires off whatever is associated with the job; in this example our stored procedure.
1.what is a Relationship in database management system?
1. External view : this is a highest level of abstraction as seen by user. This level of abstraction describes only the part of entry database. It is based on the concep…tual model, is the end user view of data environment. Each external view described by means of a schema called an external schema or subschema. The external schema consists of the definition of the logical records and the relationships in the external view. The external schema also contains he method of deriving the objects in the external view from the objects in the conceptual view. The object include entities, attributes and relationships. 2. Conceptual level : at this level of database abstraction all the database entities and the relationships among them are included. One conceptual view represents the entire database. the conceptual schema defines ths conceptual view. It there is only one conceptual schema per database. This schema also contains the method deriving from the objects in the conceptual view from the objects in the internal view.. at this level a database is described logically rather then physically in term of data structure. 3. Internal(physical) level : this lowest level of abstraction. it closest to physical storage device. It describes how data are actually stored on the storage medium. The internal schema, which contains the definition of the stored record, the method representing the data fields, expresses the internal view and the access aids used.
DBMS is the software to manage the data base.it is set of programs,modules,and packages specially designed to enable the users to manage this data base is called as data base …management system.......
dbms is data base management system .It is combination of the data base & the the softwares to access the data from the database. eg:Poracle 91,dbase; for more reply to rexrer…firstname.lastname@example.org
Atomicity means atomic data can't have multiple value of the samedata type in that column.
-Large amounts of data -Data is very structured -persistent data -valuable data
DBMS stands for data base management system. DBMS is a collectionof programs that enables users to create and maintain a database.The DBMS is a general purpose software system… used to facilitatethe process of defining, constructing and manipulating data basesfor various applications. features of DBMS: 1.Data independence 2.Efficient data access 3.Data integrity & security 4.Data administration 5.Reduced application development time
A DBMS kernal is a type of database. It is usually used in thearchitecture business world and it consists of software andsystem-level data structures.
DBMS = DataBase Management System They are used to manage various types of data, which may sound recursive but it's really that the title is fairly descriptive. Data could …be anything from a simple grocery list to a list of your Facebook friends (including their email address, mobile number, latest profile photo and religion), up to a massive set of linked chunks of data such as a warehouse inventory system, tracking data on Vendors, Products, Orders, Customers, Bills of Materials, etc. Current examples of PC DBMS software include Microsoft Access, FileMaker, etc. Lots of people use software such as Excel for managing simple lists, such as a list of products, which might contain their item #, description, price, quantity in stock, etc.
DBMS is database management system and it stores data that are related. DBMS maintains data security and integrity as well.