SQL - Match String and Update Row, using Excel list - sql

Question

I have a DB Table [List1], 2 columns, Name, Number
SQLFiddle
I have an excel spreadsheet with 2 columns,names and numbers.
I want to match the Names in Excel to the Names column in SQL and If a match is found insert the relevant number in the second column.
Something tells me I will need to build an array / or csv and run some Tsql to achieve this.
I originally used the Task> Import data to build the DB Table.
Will importing the data again just overwrite the existing data?
What is the most efficient way to import the info, but update existing numbers? [EDIT, I have made some progress, read on]
I have managed to Create an conditional insert:
SET #PersonName = 'Andy
insert into People (Name, Number)
select
#PersonName
where not exists (
select * from People where Name = #PersonName
);
How do I pump the name list into the #PersonName variable and loop through the command in SQL?
Update:
I want to update the Datasets based on a dual column First/Last name.
Will this Work?
Update : Yes it worked, final code below.
update p
set p.number = s.numbers
from People p
join dbo.[spreadsheet] s on p.Firstname = s.Firstname AND p.lastname = s.lastname

Answer 1

If I understood you correctly and you want to match relatively small amount of data (up to 2k-5k rows) between excel and database table you may perform the next sequence of actions:
In SSMS execute: create table dbo.[spreadsheet] (firstname nvarchar(100), lastname nvarchar(100), numbers int);
In Excel spreadsheet copy to buffer data from firstname, lastname and numbers columns (without headers)
In SSMS Object Explorer: Tables->Right click->Refresh
Select dbo.spreadsheet table->Right click->Edit top 200 rows
In the designer select last row->Right click the on row header->Paste
And finally execute following update statement (see below)
update p
set p.number = s.numbers
from People p
join dbo.[spreadsheet] s on s.firstname = p.firstname and s.lastname = p.lastname