Gladly, let me rephrase this as following:
Can an end user be able to paste an excel column containing list of values in a DB table(without affecting other users)  or temp table field and 
Can this feed as 'criteria' or JOIN to an existing table in SQL query command for searching results?
 
2 pages are typically involved: 
Page 1-The data column (eg. from excel)  will be pasted.  click "search" button
Page 2-runs SQL query and the results will be displayed 
 
eg. Prod Name (client pastes column) 
Apples 
Grapes 
Bananas
 
Query Results 
Apples $5 
Grapes $10
Bananas $3
 
I am unsure if Multi-lined text box which can hold many values be a right choice and how can a SQL command accept multiple number of rows from it as criteria.