I have four data frames
Df=

Roll marks grade section
123 45. C. A. C
344 67. B. A. D
442 90. A. B. B
887 80. A. B. B

Ds=
Roll marks stream class city

123. 40 SC 12 Kol
     554 67. Cc 11. mum
     663 99. A. 10. Kil
     978 100. A. 11. Che

Dq=
Roll teamcode game state
123. 34 F It
665. 56 C. Ft
775 . 89 Y. Ko
798. . 66 Z. Yt

Dv=
Marks dress Reason car
33. Gold fail no
43. Gold pass yes
55. . Gold pass yes
78. . Gold dict no

I Need to merge/join the dataframes mainly on the first dataframe like
df, ds on roll and marks
Df,sq on roll
Df , dv on marks
In the output the the first column Roll should contain data from Df[roll] only.
Like

Roll marks grade section
stream class city .
123 45. C. A. C
344 67. B. A. D
442 90. A. B. B
887 80. A. B. B

If the roll and marks is common in other df then it sould return the value present against column