newbie question, is it possible to select columns by name rather than letter when using Google Query Language with Google Spreadsheets?
This works fine for me: "SELECT A, COUNT(B) GROUP BY A"
It'd be great if I could use the column headers in the first row, more like a database, as in:
"SELECT student, COUNT(detention) GROUP BY student"
I suspect it's not possible, but hope this yet another case where my Internet search skills failed me.
This is currently not possible. The GQL documentation states[1] "Columns are referenced by the identifiers (not by labels). For example, in a Google Spreadsheet, column identifiers are the one or two character column letter (A, B, C, ...)."
If you want to do this in a spreadsheet it is possible with the following formula to convert a column header name into a letter (some tweaking might be required +1 (might be +2)). It also relies on column headers being unique and not containing commas
=REGEXEXTRACT(ADDRESS(1,COUNTA(SPLIT(LEFT(JOIN(",",TRANSPOSE(1:1)),FIND("your_column_name",JOIN(",",TRANSPOSE(1:1)))),","))+1,4);"[a-zA-Z]+")
[1] https://developers.google.com/chart/interactive/docs/querylanguage#Select
A little simpler:
SELECT "&SUBSTITUTE(ADDRESS(1,MATCH("student",Sheet1!A1:B1,0),4),1,"")&", COUNT("&SUBSTITUTE(ADDRESS(1,MATCH("detention",Sheet1!A1:B1,0),4),1,"")&") GROUP BY "&SUBSTITUTE(ADDRESS(1,MATCH("student",Sheet1!A1:B1,0),4),1,"")
I found that when you use IMPORTRANGE function on external ranges it converts from a letter to a column number, and will help you in this matter.
I've wanted to select a column based on its field name, but the problem for me was that the column to look at was likely to change in the future. So what I did was use the MATCH function to identify the column, so it looks something like
=QUERY(IMPORTRANGE("spreadsheet url","NamedRange"),"SELECT Col"&MATCH("FieldName",FieldNameRowAddress/RangeName,FALSE)")
The funny thing is you have to allow permission to access itself.
I've named my ranges that I'm importing to make it even more future proof.
来源：https://stackoverflow.com/questions/7508477/select-columns-by-name-rather-than-letter-in-google-query-language-gql-with-go