Clarity between Base Vs Core Table

[Vivekanandan1]

I needed a concrete clarity between Core Table and a Base table. While someone says Task table is base but it also is Core, while Incident table is core but yes it is ofcourse not base and sometimes cmdb_ci table is core as well as task table., not clear at all. Needs more help 

[Nayan Dhamane]

Hello @Vivekanandan1 ,

I would break it down is like this:

• Core = Any table that exists by default in the baseline instance.
• Custom = Any table that is created by an Admin that does not exist in the baseline instance.
• Base Class = Any table that is a parent table (has children) [extended], but is not a child of any other table [doesn't extend or not extending].  
• This pertains to any table, but think of it primarily in regards to newly created tables to help separate Core from Custom.

• Parent Class = Any table that has children tables [is extended by], but that is also the child of another table [extends].  
• This pertains to any table, but think of it primarily in regards to newly created tables to help separate Core from Custom.
• Child Class = Any table that has a parent table [is extended from].   This pertains to any table, but think of it primarily in regards to newly created tables to help separate Core from Custom.

• Core Base = Any table that is installed by default in the baseline instance that is a parent class table without being the child of another. (Example:   [task], [cmdb])
• Core Parent = Any table that is installed by default in the baseline instance that is a parent class table that also is a child of another.   (Example:   [cmdb_ci], [change_request])
• Core Child = Any table that is installed by default in the baseline instance that is the child of another table. (Example:   [cmdb_ci_application])

Hope that helps.

for more clarity please refer this thread.
difference between Base Table and Core table

BR,
Nayan

[jazmin]

The best answer, Thankss