Quick Answer: Which Statement Would Add A Column CGPA To A Table Student Which Is Already Created?

Which command is used for removing a table and all its data from the database?

SQL TRUNCATE TABLE commandExplanation: The SQL TRUNCATE TABLE command is used to delete complete data from an existing table.

You can also use DROP TABLE command to delete complete table but it would remove complete table structure form the database and you would need to re-create this table once again if you wish you store some data..

Which of the following statement removes database including its related components?

Which of the following statement removes database including its related components? Explanation: DROP statement adds support for dropping database snapshots.

Which command is used to remove a table?

drop table commandThe drop table command is used to delete a table and all rows in the table. To delete an entire table including all of its rows, issue the drop table command followed by the tablename. drop table is different from deleting all of the records in the table.

Is insert DDL or DML?

DML stands for Data Manipulation Language. DDL statements are used to create database, schema, constraints, users, tables etc. DML statement is used to insert, update or delete the records. DDL has no further classification.

What is the function of the unique constraint?

The UNIQUE constraint ensures that all values in a column are different. Both the UNIQUE and PRIMARY KEY constraints provide a guarantee for uniqueness for a column or set of columns. A PRIMARY KEY constraint automatically has a UNIQUE constraint.

Which SQL query would be used to find all cities whose humidity is 95?

3. SQL query to find all the cities whose humidity is 95. Explanation: The SQL WHERE clause is used to filter the results and apply conditions in a SELECT, INSERT, UPDATE, or DELETE statement.

Which statement allows us to change in the table?

To change a table definition, you can use the ALTER TABLE statement. You can add, change, or drop columns and add or remove constraints all with one ALTER TABLE statement.

Is Alter Table A DDL?

DDL – which stands for Data Definition Language which comprises SQL commands used for defining the database which includes creating tables, providing specifications, modifying tables and so on. Examples of DDL include CREATE , DROP , ALTER , etc.

Which command is used to enter data into a table?

Insert commandInsert command is used to insert data into a table. Following is its general syntax, INSERT INTO table_name VALUES(data1, data2, …)

Is delete DDL or DML?

DML is Data Manipulation Language which is used to manipulate data itself. For example: insert, update, delete are instructions in SQL. It stands for Data Definition Language. … Basic command present in DDL are CREATE, DROP, RENAME, ALTER etc.

Is truncate a DDL command?

Although TRUNCATE TABLE is similar to DELETE , it is classified as a DDL statement rather than a DML statement. It differs from DELETE in the following ways: Truncate operations drop and re-create the table, which is much faster than deleting rows one by one, particularly for large tables.

Which of the following is the structure of the database?

The correct answer is schema. The schema describes the structure of the database.