SQL> shutdown immediate SQL> startup mount SQL> alter database open read only; Database altered. Not because it’s a bad question, but because I’ve never had problems trying to create temporary tables. Are > there any workarounds? > For better performance while accessing data in a read-only tablespace, you can issue a query that accesses all of the blocks of the tables in the tablespace just before making it read-only. Private Temporary Tables in Oracle Database 18c. And also, I’ve never had complaints from users about not being able to create temporary tables. I only have read only access to my company's database (no chance of getting write) and want to import Excel data to a temp table, is this possible? After shutting down his database on his laptop and reopening it in read-only mode, James attempted to perform a simple data manipulation language (DML) operation on his global temporary table. In this example, we created a temporary table named #trek_products with two columns derived from the select list of the SELECT statement. > I have a function that creates a temp table, populate it with results > during intermediate processing, and reads from it at the end. I can create temp tables tied to just my computer, but can't find a way other than inserting, is there a quicker way? Home » Articles » 18c » Here. However, if there is a memory pressure the pages belonging to a table variable may be pushed to tempdb. You can then _overwrite_ it by another CREATE TABLE statement (without TEMPORARY keyword between it) with a different DDL. create table #tmp (col1 int, col2 int) insert into #tmp (col1, col2) values(1,2) There are several different options for doing this and in this tip we cover various ways that you can make a table read only in a SQL Server database. Whereas, a Temporary table (#temp) is created in the tempdb database. The Wizard doesn't have this button, and so trips on the Temp tables. Don't put in the whole query with all the temp tables and such. A nuance of local temporary tables (that is also a loose counter-point to #2 above) is that if you reference a local temporary table in a sub-process (i.e. Table Variables also come in very handy if fo whatever reason you have a Read Only account on a SQL server and can't create Temporary Tables Thursday, February 11, 2016 - 9:34:56 AM - Greg Robidoux Back To Top (40649) So table variable is faster then temporary table. The statement seems to succeed … In some cases there may be a need to make a SQL Server table read only. Description: You can create a temporary table in a database on a read-only instance(@@read_only returns 1) as a non-administrative user (but granted ALL on that database) You can't add or modify any data to it. When you reach the dataquery window in the report wizard. Instead put in a very simple query that just selects out the fields names and sets them null. That fact of the matter is, that as long as a user can connect to a SQL Server instance, the user is able to create temporary tables. This makes @table faster then #temp. Solution. so something like EXEC) that was created prior to that sub-process starting, it will be able to see (and even modify) that local temporary table. The following block errors out. There may be requirements where we have to make specific tables read only. There is a easy work around however. When > the transaction is marked as read only, it does not allow creation of > temp table, even though there are no permanent writes to the db. Oracle 18c introduced the concept of a private temporary table, a memory-based temporary table that is dropped at the end of the session or transaction depending on the setup. ⇒ Table variables cannot be involved in transactions, logging or locking. 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