Is MySQL hierarchical?

Is MySQL hierarchical?

The tables of a relational database are not hierarchical (like XML), but are simply a flat list. Hierarchical data has a parent-child relationship that is not naturally represented in a relational database table.

What is the difference between parent-child and level based hierarchy?

Level-based hierarchies are those in which members are of several types, and members of the same type occur only at a single level. In parent-child hierarchies, members all have the same type.

How do I create a parent-child hierarchy in Obiee?

Perform either of the following steps listed below:

1. Right-click the business model object and select New Object -> Logical Dimension -> Dimension with Parent-child hierarchy.
2. Right-click the logical dimension table and select Create Logical Dimension -> Dimension with Parent-Child hierarchy.

How do I create a parent-child hierarchy in SAP HANA?

Procedure

1. Launch SAP HANA studio.
2. Open the required attribute view or graphical calculation view in the view editor.
3. Select the Semantics node.
4. Choose the Hierarchies tab.
5. Choose the icon (Create).
6. Provide a name and description to the new hierarchy.
7. In Hierarchy Type dropdown list, select Parent-Child Hierarchy.

How many columns are needed for parent child hierarchy?

The full expansion of the parent-child hierarchy in this example requires four levels. Figure 5 shows that there is one column for each level of the hierarchy, named Level1 to Level4. The number of columns required depends on the data, so it is possible to add additional levels to accommodate for future changes in the data.

How are parent child hierarchies implemented in tabular?

The parent-child pattern implements some sort of self-join of the table containing the entities, which is not supported in Tabular. Because of their nature, parent-child hierarchies may also have a variable depth: the number of levels traversing the hierarchy top to bottom can be different depending on the navigated path.

How is the hierarchy of a parent child pattern defined?

In the parent-child pattern the hierarchy is not defined by the presence of columns in the table of the original data source. The hierarchy is based on a structure where each node of the hierarchy is related to the key of its parent node.

What are security requirements for parent child hierarchies?

A common security requirement for parent-child hierarchies is to restrict the visibility to a node (or a set of nodes) including all of its children. In that scenario, the PATHCONTAINS function is useful.