The tabular part is used if the volume or length is unknown, how is this to be understood?

Question

1C

In the training video, I heard such a phrase that the tabular part was created in order to use it when it is not known in advance what the volume or length will be. But, it is not said, the volume or length of what. Volume most likely means the quantity of the item I want to record, such as green potatoes, black potatoes, yellow potatoes. And what's the length? I can specify the length, and I can specify the precision.

Answer 1

it is not known in advance what the volume or length will be.

Colleagues correctly noted that it is difficult to guess without context. But judging by the fact that the video is educational for beginners, it is highly likely that the lecturer wanted to say:
An unknown amount of data means that the task has not yet been finalized and new descriptive characteristics may appear for stored entities. If everything is done by the details of the document, then there are two difficulties at once: add a characteristic for each object to the document properties and add the associated form element to the form. As an example, the document indicates several contact persons and their contacts; initially planned only a phone, and then decided to add an e-mail.When you have a tabular part, then you need to describe the new attribute of the tabular part once and add a column on the form - that's it, all stored objects have a new property and it can be entered / saved / viewed.
Unknown data length - this is about the amount of data stored, about the length of the list. I have seen many times when in configurations (even standard ones) they make "Member of the Inventory Commission No. 1", Member of the Inventory Commission No. 2", Member of the Inventory Commission No. 3" ... And if you still need to specify ten people? It's easier to create a tabular part and not think about quantity anymore.

Answer 2

I think the lecturer wanted to say when it is not known how much data will be.
For example, if you make the attribute "Product" in the sales document, you can sell only one product with one document. With the help of the tabular part, you can already set.

Answer 3

And what's the length?

it is difficult to evaluate a phrase torn out of the contest.

In the training video I heard such a phrase

What will be called will be decided by the developer in accordance with the task, respectively their Type (string, date, directory, enumeration, etc.) and, accordingly, from the bit depth