Question

In my server code, I create a temp (named #temp) table, insert some data and then delete the temp table. If more than 1 users were to run this section of the code (creating of the temp table) concurrently, would sql server 2008 create a temp table per user or does it create 1 ‘global’ temp table? If its one table, I assume I would run into trouble when the same table is created more than once?

Answer 1

From MSDN:

You can create local and global temporary tables. Local temporary
tables are visible only in the current session, and global temporary
tables are visible to all sessions
…
If a local temporary table is created in a stored procedure or
application that can be executed at the same time by several users,
the Database Engine must be able to distinguish the tables created by
the different users. The Database Engine does this by internally
appending a numeric suffix to each local temporary table name. The
full name of a temporary table as stored in the sysobjects table in
tempdb is made up of the table name specified in the CREATE TABLE
statement and the system-generated numeric suffix. To allow for the
suffix, table_name specified for a local temporary name cannot exceed
116 characters.