Contents
Can a detail table be linked to a master table?
In this case we link a row selection within a Master (or “parent”) table to creation of a separate Detail (or “child”) table. This is a common usage case for datasets that may have related rows within different datasets or as a result of typical database one-to-many key relationships. No critter characters were found!
What’s the glue between the master and detail tables?
The “glue” between the master and detail DataTables is the delegated click handler on the Master DataTable’s rows — or more specifically, the selectedRowChangeevent handler.
What happens when a row is clicked on a master table?
When a row is clicked and the selectedRow is changed, the underlying record from the Master table is determined and the Detail DataTable is populated with the corresponding chars data from the clicked record. We also handle TR highlighting for the clicked row by toggling a background color within this delegate handler.
What makes up the master table in ncharssimply?
The “Master” table Our primary DataTable consists of two columns, anamewhich is the category of the animals and the other column is a calculated (or “unbound”) column that is populated by a custom formatter. The custom formatter for ncharssimply returns the length of the charsarray associated with the record, or zero if none are defined.
When to use detail master W / tabs pattern?
Two patterns are described in this document: Detail Master – This is the basic Detail Master pattern. This is the pattern that you should use by default. Detail Master w/ Tabs – You should use this pattern when an entity requires many FastTabs (more than 15) that can be grouped into categories.
Where do you store denormalization in a database?
There are several denormalization techniques, each appropriate for a particular situation. Let’s explore them in depth: If you need to execute a calculation repeatedly during queries, it’s best to store the results of it. If the calculation contains detail records, you should store the derived calculation in the master table.
How to avoid a table join in denormalization?
We can avoid a table join by denormalizing the Messages table through adding the first_attachment_name column. Naturally, if a message contains more than one attachment, only the first attachment will be taken from the Messages table while other attachments will be stored in a separate Attachments table and, therefore, will require table joins.