What is the disadvantage of relational database

High Cost: RDBMS setup and maintenance can be quite expensive, which is often outside the budget of a small business. You need to buy software to get started and in many cases it takes a professional database administrator or programmer experienced in Structured Query Language or SQL to set it up.

Structured Limits: In many relational database systems, the length of the data field is pre-defined. If you enter more information in a field than its limit, then there is a fear of losing the information.

Risk of Data Loss: Large organizations use more number of database systems with more tables. This information can be used to transfer information from one system to another, but there is a risk of data loss due to missing essential tables or any mistake at the time of transfer.