DDL?
Data Definition Language (DDL) statements are used to define the database structure or schema. Some examples:?

CREATE - to create objects in the database?
ALTER - alters the structure of the database?
DROP - delete objects from the database?
TRUNCATE - remove all records from a table, including all spaces allocated for the records are removed?
COMMENT - add comments to the data dictionary?
RENAME - rename an object?

DML?
Data Manipulation Language (DML) statements are used for managing data within schema objects. Some examples:?

SELECT - retrieve data from the a database?
INSERT - insert data into a table?
UPDATE - updates existing data within a table?
DELETE - deletes all records from a table, the space for the records remain?
MERGE - UPSERT operation (insert or update)?
CALL - call a PL/SQL or Java subprogram?
EXPLAIN PLAN - explain access path to data?
LOCK TABLE - control concurrency?

DCL?
Data Control Language (DCL) statements. Some examples:?