Count Left Nodes

Question

Hello Friends,

I've a table as given below

ID LChild RChild
1       2         3
2      4          6
3      5          7
4      8          9
5     10       11
6     12       13
7      0        14


Now i've to find out the LChild of 1, 1 has 2 in it's left and 2 has 4,6 as it's child and 4 and 6 has also two-two child each......At final 1 has 7 child on it's left and on it's Right it's 6

And also i've find out for each ID i.e 1,2,3,4,5,6,7