C# SQL Select from multiple tables

Question

Hey C# Corner,

 

 I have the following line:

minDat = new SqlCommand("SELECT * FROM Data WHERE (FileName like '%.html' or FileName like '%.htm') and ocrconvert = 0", cnn).ExecuteReader();

I want to SELECT * FROM Data and TestTable

 

So is is possible in that line to make it able to select everything from multiple tables?

Best regards