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How can I create a temporary table without first creating the columns?
CREATE TABLE #Yaks (
YakID int,
YakName char(30) )
select name
from tempdb..sysobjects
where name like '#yak%'
drop table #yaks
It is a pain to have to define the table first.
533
To create a Global Temporary Table, add the “##” symbol before the table name. Global Temporary Tables are visible to all connections and Dropped when the last connection referencing the table is closed. Global Table Name must have an Unique Table Name.
You want to run a SELECT query and save the result set into another table, but that table doesn't exist yet. Create the destination table first, or create it directly from the result of the SELECT.
No, a view consists of a single SELECT statement. You cannot create or drop tables in a view. Maybe a common table expression (CTE) can solve your problem. CTEs are temporary result sets that are defined within the execution scope of a single statement and they can be used in views.
So in such cases, SQL Server provides us with a feature called temporary tables which can be created at runtime and used to store the data temporarily. They can be used to create a workspace for processing the data inside stored procedure or functions. They can be used for complex joins.
Create a (temp) table with the same columns as another (no data copied):
select * into #TempTable
from MyTable
where 1=0
Note: Does not create any Foreign keys, indexes etc...
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