How do I dynamically set the table and field name in an update query?

Question

I\'d like to loop over a list of tables. For each table, I\'d like to run an update query.

Psuedo code:

ArrayOfTablesObjects = {[\'tablename1\',\'fieldn         


        

Answer 1

You need to use dynamic SQL for this. The EXEC function will execute an ad-hoc sql statement passed in as a string.

DECLARE @UpdateSql AS varchar(2000)

foreach @tablename in ArrayOfTablesObjects 

SET @UpdateSql = 'UPDATE ' + @tablename + ' SET ' + @fieldname ' + = ''xyz'' WHERE ' + @fieldname + ' = ''123'''
EXEC (@UpdateSql)

end foreach