Do SQL pros write seperate stored procedures to handle Save and update operations?

hi friends,
Currently i'm bit confused with the industry standard of writing store procedures for save and update operations. I have sees people write separate stored procedure to handle save and update operations even they have to write complex queries. Also I have
seen people writing one store procedure to handle both Save and Update operations even when the queries are complicated. when I asked them why they do it, they said why should waste time on writing another query to update instead write one save store procedure
to handle all.
In here there are SQL Pros, Gurus, what would say about this?
what is the actual industry standard with stored procedure to perform save and update operations, do you write separate ones or do both in one?
thanks
I use Visual studio 2012 Ultimate and SQL server 2008 developer edition!

>what is the actual industry standard with stored procedure to perform save and update operations
There is no industry standard. Guideline though you want to be happy with the sp-s; same for your peers.
As noted above the MERGE command is like a Swiss Army knife; it can perform INSERT, UPDATE & DELETE
in one (huge) statement.
Make sure you pick good names for the sp-s, document the parameters and comment the logic if any.
Format the stored procedure for readability:
http://www.sqlusa.com/sqlformat/
Kalman Toth Database & OLAP Architect
SELECT Query Video Tutorial 4 Hours
New Book / Kindle: Exam 70-461 Bootcamp: Querying Microsoft SQL Server 2012

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Supporting SQL Objects:
CREATE FUNCTION [posit].[Get_PositorId]
RETURNS INT
AS
BEGIN
DECLARE @PositorId INT = NULL;
SELECT TOP 1
@PositorId = [p].[PO_PositorId]
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@PositorNote NVARCHAR(348) = NULL
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BEGIN
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ssd

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