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i am researching about Hierarchical data by using ms sql .Here is my db value
Parent || Child
Fruit Red
Red Apple
Red Strawberry
Fruit Yellow
Yellow banana
banana papaya
Null Fruit
How can i join the table to become something like this
Fruit
Red
Strawberry
Apple
Yellow
banana
papaya
It can be more nested . How can i dynamic join the table and show the result at above?
You should probably first investigate how you want to store the hierarchy before worrying how to query it (this will be somewhat dictated by your schema/storage structure). There are several common methods for storing category-type (i.e. hierarchical) data:
One of the better single sources of information I’ve seen is this page which has all the detail you could want, as well as links to examples, code samples, etc. Each has its own pros and cons regarding simplicity, performance, etc.
Cheers,
Dave