Sample Coding Wanted!

Dear all,

Can anybody provide sample t-sql procedures coding to do the following tasks?

I want to call a sql stored procedures with parameter passing. I write down the pseudo codes as follows:

In the SQL server side, write a stored procedure which performs the following:

With input parameter "ABCDE";
execute SQL statement "select * from table A where tableA.field B = "ABCDE";
For each record from the result of the above SQL statement,
"select * from tableB where tableB.field C=tableA.fieldX"
if the record can be found in tableB,
"update tableB set tableB.fieldD=something";
if the record cannot be found in tableB,
"insert a new record in tableB"

My actual application requirement is that I have an input file of over hundred thousand records which acts as a primary file to update or to add records to another file. My client side application, which is VB.NET, call a sql procedures once to perform this task. I don't want the VB.NET program to loop through all the input records and call a sql procedure a hundred thousand times!


thanks in advance!