Excel / Sheets
Basic Info
This returns the Column Letter but removes the Row Number
=SUBSTITUTE(ADDRESS(1,COLUMN(),4),"1","")
The column number, but also doing math so I can do VLOOKUP without having to physically count everything
="ColNUM "&COLUMN()&CHAR(10)&"ColSUM "&COLUMN()-21
Conditional Formatting for Google Sheets
=regexmatch(C3,"Keyword")
=COUNTIF (A:A, A1)>1
CONCAT or NOT - both do the same thing
...use the &, though
=CONCATENATE(A1," ",B1)
=A1&" "&B1
Concatenate Fields with Carriage Returns
=A2&IF(B2<>"",CHAR(10)&B2,"")&IF(C2<>"",CHAR(10)&C2,"")
Convert All Zips Variants to Leading Zeroes
=SWITCH(LEN(A2),4,TEXT(A2,"00000"),5,A2,8,TEXT(A2,"00000-0000"),9,TEXT(A2,"00000-0000"))
Day in Previous Quarter (First / Last)
=DATE(YEAR(DateCell),FLOOR(MONTH(DateCell)-1,3)-1,0)
=DATE(YEAR(DateCell),FLOOR(MONTH(DateCell)-1,3)+1,0)
Tab ID Hyperlink
A2 being the Google Sheets Tab ID (gid=1896709346)
=HYPERLINK("#gid="&A2,REGEXEXTRACT(CELL("address",SheetName!$A$1),"'?([^']+)'?!"))
Dynamic Array with CountIF
This will show all the Unique values and how many times they show up. Two columns.
=LET(data, B1:B20, u, UNIQUE(data), HSTACK(u, COUNTIF(data, u)))
This will show all the Unique values and how many times they show up, but with one column!
=LET(data, B1:B20, u, UNIQUE(data), u & " (" & COUNTIF(data, u) & ")")