When should you use lookup instead of a master detail relationship?

When should you use lookup instead of a master detail relationship?

A typical use of a Master-Detail would be the classic Sales Order and Sales Order Items objects. Lookups are generally for use where you may or may need to have a relationship between two objects (but not always). Lookups are generally used to reference commonly shared data, such as reference data.

What is the best practice limit for child records on master detail relationships?

10,000 child records
As a best practice, don’t exceed 10,000 child records for a master-detail relationship.

Can we change lookup relationship to master detail?

To convert lookup to the master-detail relationship you need to give parent records on all child records. Then only you can convert a lookup relationship to a master-detail relationship if the lookup field in all the records contains a value.

What is the key difference between a master detail relationship and a lookup relationship?

The Salesforce lookup relationship has no relation with other records. It does not depend on any other objects, whereas a master-detail relationship has an association with other records. On the other hand, the lookup relationship is just a reference. It can be even blank or NULL.

What is the difference between a lookup and master-detail relationship?

Can a standard object have more than one master-detail relationship?

Only up to two master detail relationships are allowed for an object. You can have only Upto three levels of custom detail levels. We can’t create a Master-detail relationship when the custom object already contains data. Each object is allowed to have one or two masters or up to 8 details.

What are the best practices regarding lookup tables in relational databases?

What are the best practices regarding lookup tables in relational databases? Lookup tables (or code tables, as some people call them) are usually a collection of the possible values that can be given for a certain column.

Which is the best option for a lookup table?

Otherwise lookup tables with appropriately implemented foreign keys are pretty much always the best option. There is a possible variation on the lookup table option where you potentially have a large number of lookup tables for simple id/value relationships.

Is the company position table a lookup table?

Positions in a company is definitely a lookup table. The same goes for translations, which may be a bit trickier, but generally a view definition joining the table with a translation table is a good start. Besides, if the Position is only an int value, and your app is single-language, you can add the position titles directly to the database.

When to use enumeration in a lookup table?

Generally you should only use enumeration where there is a clear set of items that will not change, e.g. primary colours, or continent names. Otherwise lookup tables with appropriately implemented foreign keys are pretty much always the best option.