How to find duplicate data in database? Explain DDL and DML.

How to find duplicate data in database? Explain DDL and DML.

From the Janata Bank Assistant Network Engineer 2020 – Written exam, question 51 of 68.

More from this paper

Previous: Design and Queries from HR schema. The HR schema (primary key columns in bold; arrows show which column refers to which): Table Columns…
Next: What is Register? Write down the name of 5 CPU Register.
All questions in Janata Bank Assistant Network Engineer 2020 – Written