The document discusses different ways to manipulate data in tables, including inserting, updating, and deleting rows. It explains that the INSERT statement is used to add rows to a table. The UPDATE statement updates existing rows by changing column values. Rows can be deleted using the DELETE statement with an optional WHERE clause to target specific rows, or the TRUNCATE statement to delete all rows at once. Subqueries can also be used with these statements to insert, update, or delete rows based on the results of a subquery. Guidelines are provided for each operation to ensure data integrity is maintained.