Table Relationship
Table relationship refers to the way two or more tables are connected to each other in a database. In data science, table relationship is an important concept as it helps in organizing and analyzing data efficiently. There are three types of table relationships: one-to-one, one-to-many, and many-to-many. In a one-to-one relationship, each record in one table is related to only one record in another table. In a one-to-many relationship, each record in one table can be related to multiple records in another table. In a many-to-many relationship, multiple records in one table can be related to multiple records in another table. To establish a table relationship, a primary key is used in one table and a foreign key is used in another table. The primary key is a unique identifier for each record in a table, while the foreign key is a field in another table that refers to the primary key in the first table.
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