I would like to move variable names to the 1st row observations (as string)

In the following example, I would like the variable dates to become the first row of observations (the new names of the columns do not matter)
Code:
* Example generated by -dataex-. To install: ssc install dataex
clear
input str8 DATATYPE double(__7_8_2020 __7_1_2020 _6_24_2020 _6_17_2020 _6_10_2020 __6_3_2020 _5_27_2020 _5_20_2020 _5_13_2020)
"SP500_w" 6496.14 6383.76 6247.66 6375.54 6529.42 6389.67 6209.38 6075.76 5761.7
"VIX_w"     28.08   28.62   33.84   33.47   27.57   25.66   27.62   27.99  35.28
end
In other words, I'm trying the opposite of what "nrow" does. Please help.