P-value interpretation of ANOVA

Dear Omics Forun team.
Hi, I am Gwangbin Lee, a postdoctoral associate in Dr. Hao’s lab at George Washington University.
I have a question about the p-value in ANOVA.
After finishing the statistical analysis, I checked the p-value of my data sets but couldn’t understand the p-value information.
To my knowledge, if I had a 3 sample group, the number of p-value should be 3 but I can see only one p-value.
ex) Sample group A, B, and C → p-value for A-C, A-B, and B-C.
How can I interpret the result in the metaboanaylst?
Please let me know.
Also, I attached the screenshot of the result for your understanding of my situation.

The ANOVA is based on standard procedures (one-way ANOVA, two-way ANOVA and post-hoc analysis). This is a good intro on ANOVA. Your understanding seems to be related to post-hoc analysis.

Thank you for your reply.
However, what I want to know is the p-value for all comparisons (a-b, a-c, and b-c)
Is there any option to get the all p-value on Metaboanalyst?
Please let me know.
Thank you.

If you are interested in pair-wise tests, one possible alternative is linear modelling (with covariate adjustment). It is available in “Statistical Analysis [metadata table]” module. Refer to our latest Nature Protocol on this topic