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SQL Language Instructions used to perform a group of sql instructions as a together in order for them to keep their atomicity (ACID properties). Most common is BEGIN TRANSACTION, followed by a set of instructions (INSERT, UPDATE, etc.), ending with either COMMIT (success) or ROLLBACK if there was a problem for the database to get back to a consistent state.
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Define dtl in sql?
data transaction languagedata transaction languagedata transaction language data transaction languagedata transaction language
What are the elements of SQL?
Data manipulation language(DML) data Defenition language(DDL) data control Language(DCL) Transaction Control
DBMS facilities required for Recovery and back up?
1.The data definition facility or data definition language (DDL). 2.The data manipulation facility or data manipulation language (DML). 3.The data query facility or data query language [DQL]. 4.The data control facility or data control language [DCL]. 5.The transaction control facility or data control language [TCL].
What is a transaction in a data base system?
Like transaction in banks there are transactions in a database system too like deleting data is also a transaction. Transaction can be recovered using rollback and save point.
What is lock-base protocols?
once one transaction is accessing the data, no other transaction is made to modify the data
What is lock based protocols?
once one transaction is accessing the data, no other transaction is made to modify the data
What is entering transaction data on a form called?
data entry
In which language we don't need transaction?
machine level language
Different types of SQL language?
Data Definition Language (DDL): Used to define and modify the structure of database objects like tables, indexes, and views. Data Manipulation Language (DML): Used to query and manipulate data in tables, such as SELECT, INSERT, UPDATE, and DELETE. Data Control Language (DCL): Used to control access to data, like granting and revoking permissions. Transaction Control Language (TCL): Used to manage transactions within a database, like committing or rolling back changes.
Difference between nested and distributed transaction?
·A nested transaction is a transaction that is logically decomposed into a hierarchy of sub transaction. A distributed transaction is logically a flat, indivisible transaction that operates on distributed data.
Does a transaction processing information produce information or data?
is data different from information?
Inputs to the financial information system?
transaction data
