This is very much the basics of the song, but it is the right notes.
Whether the guitarist capos the 2nd fret or not doesn't matter for the bass.
Intro + Verse 1st half (Basically play 4 times)
G---------------------------------------------------------------------------
D--------------22---2-------------------------------------------------------
A---44---4----------------22---2---22----2--3-------------------------------
E---------------------------------------------------------------------------
Verse 2nd Half
G---------------------------------------------------------------------------
D-------------22---2--------------------------------------------------------
A---44---4--------------22---2-----------------------------------22--22-----
E-----------------------------------44---4----00---0---22---2------22--22---
Chorus
G---------------------------------------------------------------------------
D---------------------------------------------------------------------------
A---22---2----------------------2-44---4---------22---2---------------------
E--------------22---2---44---4--------------00-------------22---------------
Repeat, then after the second chorus, continue into:
G---------------------------------------------------------------------------
D-------2---4--------------2---4--------------2---4-------------------------
A--------------------------------------------------------------22-------22--
E---4------------4-----4------------4-----4------------4---------22-------22
Bridge
[ Tab from: https://www.guitartabs.cc/tabs/b/barenaked_ladies/alcohol_btab.html ]
G---------------------------------------------------------------------------
D---99---88---77---66---99---88---77---66---99---88---77---66---------------
A---------------------------------------------------------------------------
E---------------------------------------------------------------------------
G---------------------------------------------------------------------------
D---99---88---77------------------------------------------------------------
A---------------------------------------------------------------------------
E---------------------0---2-------------------------------------------------
Repeat Intro during piano solo
Chorus
G---------------------------------------------------------------------------
D---------------------------------------------------------------------------
A---22---2----------------------2-44---4---------22---2---------------------
E--------------22---2---44---4--------------00-------------22---------------
G---------------------------------------------------------------------------
D---------------------------------------------------------------------------
A---22---2----------------------2-44---4---------22---2---------------------
E--------------22---2---44---4--------------00-------------22---------------
G---------------------------------------------------------------------------
D-------2---4--------------2---4--------------2---4-------------------------
A--------------------------------------------------------------22------22---
E---4------------4-----4------------4-----4------------4----------22------22