How to use Excel formula to realize splicing tables?

As shown in the figure, 1. First, insert a new column, and I will name it Summary.

2. Select the first editable row of the new column and enter the formula. I want the splicing value of the second row of column A and the second row of column B, so the formula = a2 &;; B2。 Write the equal sign!

3. Select the cell that just got the value and drop it down directly.

Step 4: Complete