what is database schema

1A database schema is a blueprint or architecture of how our data will look. 
2It doesn’t hold data itself, but instead describes the shape of the data and how it might
3relate to other tables or models. An entry in our database will be an instance of the
4database schema. It will contain all of the properties described in the schema.

1DATABASE SCHEMA: is a chart that shows
2all the tables and how they are
3related to each other.
4• If there is no schema:
51. Oracle ===> SELECT table_name FROM user_tables;
62. MySQL ===> show tables;