AVL Trees:
AVL tree is a self-balancing binary search tree in which each node maintain an extra factor which is called balance factor whose value is either -1, 0 or 1.
B-Tree:
A B-tree is a self – balancing tree data structure that keeps data sorted and allows searches, insertions, and deletions in O(log N) time.
Difference between AVL Tree and B-Tree:
| S.No. | AVL Trees | B-Tree | 
|---|---|---|
| 1 | It is a self-balancing binary search tree | It is a multi-way tree(N – ary tree). | 
| 2 | Every node contains at most 2 child nodes | In this tree, nodes can have multiple child nodes | 
| 3 | It has a balance factor whose value is either -1, 0, or 1. Balance factor = (height of left subtree)-(height of right subtree) or Balance factor = (height of right subtree)-(height of left subtree) | B-Tree is defined by the term minimum degree ‘t‘. The value of ‘t‘ depends upon disk block size. Every node except the root must contain at least t-1 keys. The root may contain a minimum of 1 key. | 
| 4 | AVL tree has a height of log(N) (Where N is the number of nodes). | B-tree has a height of log(M*N) (Where ‘M’ is the order of tree and N is the number of nodes). | 
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