Create a temporary table like a current table in S

问题:

How do you create a temporary table exactly like a current table in a stored procedure?

回答1:

select * into #temp_table from current_table_in_stored_procedure

#temp_table - locally temp
##temp_table - globally temp

select top 0 * into #temp_table from current_table_in_stored_procedure to have empty table

回答2:

SELECT * INTO #t FROM table

if you want it to be empty:

SELECT * INTO #t FROM table WHERE 1 = 2

回答3:

Alternatively you can script the existing table and change the name to the temp table name and add the create table script to the top of the rest of the script you want to run. I generally do this if it really important the temp table exactly match the structure of the real table (for instance when I am creating a fake table called #inserted to use when testing the code I intend to put into a trigger.)

Most of the time though the select into will get you what you need.

回答4:

A Common Table Expression or Table Variables can also server the purpose apart from a Temp Table