- A Table record in first table is related to more than one record of second table. But second table record maps to only one entry of first table
- NocoDB refers to this category of relationship as **has many**
- For every **has many** relation defined, NocoDB augments **belongs to** relationship column in the adjacent table automatically
- Example: Country **has many** Cities. (other way mapping > City **belongs to** Country )
- Many to many
- A Table record in first table is related to more than one record of second table; second table record can also map to more than on record of first table.
- NocoDB refers to this category of relationship as **many to many**
- For every **many to many** relation defined between tables, NocoDB augments **many to many** relationship column in the other table automatically
- Example: Film **has many** Actors. Actor **has many** Films (works on many films)
Further details of relationship types can be found [here](https://afteracademy.com/blog/what-are-the-different-types-of-relationships-in-dbms)
It is important to note that, earlier supported column type **LinkToAnotherRecord** for creating relations is considered deprecated. While the old datatype is still supported for backward compatibility, it is no longer possible to create new fields of that type.
The main distinction between these two column types lies in how the contents are displayed within the cell when links are established between two tables. With the **LinkToAnotherRecord** column type, the cell displays the **Primary value** of the related records. On the other hand, the **Links** column type only shows the **count** of related records.
The decision to switch over to new column type was made to ensure better performance and scalability of the application, more so when the records & the number of records in the related table is large.
Child list to display the related records can be accessed by clicking on the link count displayed on the cell.
Except for the column type, the following procedures remain same as before
