Hi @Shandan,
Take a try to add a Create HTML table Action between SQL get rows and the Send Email Action:
Some notes here:
1. Choose the Value from Get Rows Action for the From parameter of the Create HTML table, then click Advanced option, set the Include headers to Yes,
For the Send an Email Action, after specify the corresponding From and the Subject, choose the Output of Create HTML table as the Body, then click Advanced options, change the Is HTML as Yes.

Please take a try with the configuration above, and if you need any further assistance on this, please post back.
Regards,
Michael