How to store tree nodes in data base

i am creating a tree with create node and delete node dynamically
how can i store the tree nodes in the data base and how can i retrive them from data base to tree and tree table

Thank s for replay
I am tring to the tree nodes and Dynamically creating and removing the nodes from the tree that tree structure have to store in the data base and after wards retrive the tree structure from the database and display as the tree

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which datatype in MS SQl should i use to store word file

Thank s for replay
I am tring to the tree nodes and Dynamically creating and removing the nodes from the tree that tree structure have to store in the data base and after wards retrive the tree structure from the database and display as the tree

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Hie
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One Database table contain 249 Fields.
Rewards Points if useful..
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Hello alllll
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Hello Ammad Ahmed
Thanks really for reply ,i appreciate... :)
Can you explain little more what is the meaning of this?a tree block on canvas beside 3 data blockS out of 2 tables as follows
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Name                                      Null?    Type
ACCOUNT_ID                                NOT NULL NUMBER(10)
TYPE_ID                                   NOT NULL NUMBER(1)
ACCOUNT_NAME                              NOT NULL VARCHAR2(100)
IS_CLOSED                                 NOT NULL NUMBER(1)
ACCOUNT_ID_PARENT                                  NUMBER(10)
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Name                                      Null?    Type
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