How do you perform DDL operations?
DDL (Data Definition Language):
It consists of metadata of the database schema and also create and modify the structure of the various objects within the database.
DDL commands: CREATE – is used to create the database or its objects (table index, function, views, store procedure and triggers)..
How to create database using DDL?
Data Definition Language(DDL) is a type of SQL command used to define the components of databases using Database Management Systems.
DDL in DBMS is used to create or modify the database objects like tables, views etc.
These commands deal with defining a schema and adding a table description to it..
What is DDL DML and DCL in DBMS?
DDL commands define and manage the database structure.
DML commands manipulate data within the database.
DCL commands control access and security.
TCL commands manage transactions and data integrity..
What is DDL in database management system?
Data Definition Language (DDL) is used to create and modify the structure of objects in a database using predefined commands and a specific syntax.
These database objects include tables, sequences, locations, aliases, schemas and indexes..
What is DML in database management system?
A data manipulation language (DML) is a computer programming language used for adding (inserting), deleting, and modifying (updating) data in a database.
A DML is often a sublanguage of a broader database language such as SQL, with the DML comprising some of the operators in the language..
What is role of DDL compiler in DBMS?
List of DDL commands:
- CREATE: This command is used to create the database or its objects (like table, index, function, views, store procedure, and triggers)
- DROP: This command is used to delete objects from the database
- ALTER: This is used to alter the structure of the database
- DDL Interpreter: It interprets the DDL (Data Definition Language) Instructions and stores the record in a data dictionary (in a table containing meta-data) Query Optimizer: It executes the DML Instructions and picks the lowest cost evaluation plan out of all the alternatives present.
