Data Definition Language Quiz

What is the correct syntax to insert data into a table?

What is the primary purpose of the UPDATE command?

Which clause is necessary to specify which records to delete?

What does the 'SET' keyword do in the UPDATE command?

In the DELETE command, what does the clause 'FROM table_name' indicate?

What is the primary purpose of Data Definition Language (DDL)?

Which of the following is NOT a data type commonly used in DDL?

What command is used to create a new table in a database?

Which DDL command would you use to add a new column to an existing table?

When specifying a new table in DDL, which piece of information is NOT required?

Which command is used to remove an entire table from a database?

What does DML stand for in database management?

Which command is used to insert a data row into a table?

Data Definition Language (DDL)

DDL is a language.
It allows the user to define data.
It defines the relationship between data and other data types.
DDL statements manage database table structure.
Various data types are used to define columns in a database table.
Examples of data types include VARCHAR2, CHAR, and NUMBER.
Defining a table involves specifying the table name, column names, data types, and column sizes.

DDL Commands

CREATE: Creates a new table or database.
- Example command: CREATE TABLE it.student (...)
- Example table structure includes fields for stdname, branch, college, age, telephone, and address.
ALTER: Modifies existing table structure.
- Example command: ALTER TABLE it.student ADD birthdate DATETIME;
DROP: Deletes a table, index, or view from the database.
- Example command: DROP TABLE it.student;

Data Manipulation Language (DML)

DML is used to manipulate data in a database.
Includes inserting, deleting, and updating data.

Insert Command

Inserts data rows into a table.
Syntax: INSERT INTO table_name (col1, col2, ...) VALUES (value1, value2, ...);
Alternative syntax: INSERT INTO table_name VALUES (value1, value2, ...);

Update Command

Updates existing data in a table.
Syntax: UPDATE table_name SET column1 = value1, column2 = value2 ... WHERE condition;
- table_name: The table to update.
- SET: Defines the columns and their new values.
- WHERE: Specifies the condition for which rows should be updated.

Delete Command

Deletes records from a table.
Syntax: DELETE FROM table_name WHERE condition;
- table_name: The table to delete from.
- WHERE: Specifies the condition for deleting rows.

Test your knowledge on Data Definition Language (DDL) and its commands. This quiz covers various aspects of DDL, including table creation, modification, and deletion, along with associated data types. Perfect for those looking to strengthen their understanding of database structure management.