In Hive, tables are defined using a syntax similar to SQL. Users can use the CREATE TABLE statement to define the structure of the table, including column names, data types, and other properties. For example, here is a simple example of creating a table in Hive:

CREATE TABLE my_table (
    id INT,
    name STRING,
    age INT
)

In this example, we created a table called my_table with three columns: id, name, and age, each of which is of integer and string type. Users can also define additional properties such as partitions, storage format, and the location of the table.