Creating temporary view from a temporary table in SQL Server
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I have a temporary table and I would like to create a temporary view over this temporary table.
Is it possible?
In following example I would like
#Top10Records to be a view instead of a table so that I get
select * into #Top10Records from (select top 10 * from #MytempTable)
Unfortunately, SQL Server doesn't support this:
Msg 4103, Level 15, State 1, Line 3 "#someView": Temporary views are not allowed. Msg 4508, Level 16, State 1, Line 6 Views or functions are not allowed on temporary tables. Table names that begin with '#' denote temporary tables.
CREATE LOCAL TEMPORARY VIEW, You are here: SQL Reference Manual > SQL Statements > CREATE Local temporary views are session-scoped, so they are visible only to their creator in Vertica maps view column names to query columns according to the order of their The SELECT statement can reference tables, temporary tables, and other views. However, temporary tables can be easily created in SQL Server and used to manipulate the data inside of our database, but the misuse of temporary tables is not good for the database. because after all, these tables are stored in tempdb database of the SQL Server and this can be affect to some other processes of the database.
You can use a Common Table expression to do that:
WITH Top10Records AS ( select top 10 * from #MytempTable ) SELECT * FROM Top10Records GO
Introduction to Temporary Tables in SQL Server, A temporary table in SQL Server, as the name suggests, is a database table that exists temporarily Temporary tables are stored inside “tempdb” which is a system database. We will use this data to create temporary tables. The above SQL script creates a database ‘schooldb’. In this database, a table called ‘student’ is created and some dummy data added into the table. Creating A Temporary Table. There are two methods of creating temporary tables. Method 1. The simplest way of creating a temporary table is by using an INTO statement within a SELECT query.
SQL Server does not support temporary views as such and as stated above by Daryl, a Common Table Expression is probably the way to go. However, one limitation of a CTE is that it can't be used across multiple queries in a batch. You can however create a standard view, use it as required then simply drop it at the end of the batch/transaction. (I know the OP question is whether or not you can create a temporary view, but this may also potentially apply - it requires a schema change, but a transient one for all intents and purposes).
An Introduction to SQL Server Temporary Tables By Pracical , SQL Server provided two ways to create temporary tables via SELECT INTO and As you can see clearly from the picture, the temporary table also consists of a� The statement created the temporary table and populated data from the production.products table into the temporary table. Once you execute the statement, you can find the temporary table name created in the system database named tempdb , which can be accessed via the SQL Server Management Studio using the following path System Databases
create temp view – SQLServerCentral, create temp view – Learn more on the SQLServerCentral forums. If the query executed against that temp table were SELECT * FROM #View Author of: SQL Server 2017 Query Performance Tuning, 5th Edition and SQL� A partitioned view is a view defined by a UNION ALL of member tables structured in the same way, but stored separately as multiple tables in either the same instance of SQL Server or in a group of autonomous instances of SQL Server servers, called federated database servers.
creating a view using temporary table - MSDN, SQL Server. > Transact- And I need to create it using temporary tables(# tablename). You cannot use temp tables while creating VIEWs. A temporary table exists for the entire database session in which it was created. A view is automatically populated with the data retrieved by the query that defines it. You must add data to a temporary table with SQL INSERT commands. Only views that meet the criteria for view updatability can be used for data modifications.
Using a Temporary Table in a View in Order to Combine three Queries, SQL Server. > Getting started with SQL Server Unfortunately the temp table doesnot supports for creating a view, instead of using temp tables� A temporary table, or temp table, is a user created table that exists for the sole purpose of storing a subset of data from one or more physical tables. Temp tables can be used to store large amounts of data that would otherwise require numerous queries to repeatedly filter that data.
- +1 that's probably the most elegant workaround - good response
- Of course, this only works for a single statement following the CTE. We don't know if the OP intended to use the temp view across multiple statements.
- It is intended to be used multiple times as the #MytempTable will be changing always
- My work around was to drop and create another #Top10Records temp table every time .
- @IanLee you can use CTE (or multiple, chained CTEs) to divide your code so that it is clearer. You could want to make a complex query over one or multiple query results which are themselves produced by complex queries. Rather than having all querying logic mixed up, you can split it so it's easier to understand.