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Which of the following is the subset of SQL commands used to manipulate Oracle Structures, including tables?
- a)Data Described Language
- b)Data Retrieval Language
- c)Data Manipulation Language
- d)Data Definition Language
Correct answer is option 'D'. Can you explain this answer?
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Most Upvoted Answer
Which of the following is the subset of SQL commands used to manipulat...
Data Definition Language (DDL)
Data Definition Language (DDL) is a subset of SQL commands used to define and manipulate the structure of database objects. It allows users to create, modify, and delete database objects such as tables, views, indexes, and sequences. In the context of Oracle Structures, DDL commands are used to manipulate tables and other related objects.
Key DDL Commands
Some of the key DDL commands used to manipulate Oracle Structures include:
1. CREATE: The CREATE command is used to create new database objects. For example, CREATE TABLE is used to create a new table in the database.
2. ALTER: The ALTER command is used to modify the structure of existing database objects. For example, ALTER TABLE is used to add, modify or delete columns in a table.
3. DROP: The DROP command is used to delete existing database objects. For example, DROP TABLE is used to delete a table from the database.
4. TRUNCATE: The TRUNCATE command is used to delete all the data from a table while keeping the table structure intact.
5. RENAME: The RENAME command is used to rename an existing database object. For example, RENAME TABLE is used to rename a table.
6. COMMENT: The COMMENT command is used to add comments or descriptions to database objects. For example, COMMENT ON TABLE is used to add a comment to a table.
Conclusion
In conclusion, the subset of SQL commands used to manipulate Oracle Structures, including tables, is the Data Definition Language (DDL). DDL commands such as CREATE, ALTER, DROP, TRUNCATE, RENAME, and COMMENT are used to define, modify, and delete database objects. These commands play a crucial role in managing the structure of the database and ensuring data integrity.
Data Definition Language (DDL) is a subset of SQL commands used to define and manipulate the structure of database objects. It allows users to create, modify, and delete database objects such as tables, views, indexes, and sequences. In the context of Oracle Structures, DDL commands are used to manipulate tables and other related objects.
Key DDL Commands
Some of the key DDL commands used to manipulate Oracle Structures include:
1. CREATE: The CREATE command is used to create new database objects. For example, CREATE TABLE is used to create a new table in the database.
2. ALTER: The ALTER command is used to modify the structure of existing database objects. For example, ALTER TABLE is used to add, modify or delete columns in a table.
3. DROP: The DROP command is used to delete existing database objects. For example, DROP TABLE is used to delete a table from the database.
4. TRUNCATE: The TRUNCATE command is used to delete all the data from a table while keeping the table structure intact.
5. RENAME: The RENAME command is used to rename an existing database object. For example, RENAME TABLE is used to rename a table.
6. COMMENT: The COMMENT command is used to add comments or descriptions to database objects. For example, COMMENT ON TABLE is used to add a comment to a table.
Conclusion
In conclusion, the subset of SQL commands used to manipulate Oracle Structures, including tables, is the Data Definition Language (DDL). DDL commands such as CREATE, ALTER, DROP, TRUNCATE, RENAME, and COMMENT are used to define, modify, and delete database objects. These commands play a crucial role in managing the structure of the database and ensuring data integrity.
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Which of the following is the subset of SQL commands used to manipulat...
DDLs are used to define schema and table characters and consist of commands that help in modifying. DML performs the change in the values of the relation.
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Which of the following is the subset of SQL commands used to manipulate Oracle Structures, including tables?a)Data Described Languageb)Data Retrieval Languagec)Data Manipulation Languaged)Data Definition LanguageCorrect answer is option 'D'. Can you explain this answer?
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