Can we create indexes views and triggers on temporary tables?
Indexes created on temporary tables are also temporary, and the data in the index has the same session or transaction scope as the data in the temporary table. You can create views that access both temporary and permanent tables. You can also create triggers on temporary tables.
What is allow snapshot isolation in SQL Server?
SNAPSHOT isolation specifies that data read within a transaction will never reflect changes made by other simultaneous transactions. If you set the READ_COMMITTED_SNAPSHOT database option to ON, the database engine uses row versioning and snapshot isolation as the default, instead of using locks to protect the data.
Can we create triggers on temporary table in SQL Server?
SQL Server does not allow to create triggers on Temporary tables that included local and global temporary tables. If you try to create trigger , this is the error you will get. Cannot CREATE TRIGGER ON a TEMPORARY object.
Can trigger create temp table?
4 Answers. Damien’s answer is correct: you can use temporary tables in triggers, but it is strongly recommended to define them there, since the trigger can fire in various contexts.
Can triggers be temporary?
A trigger is a named database object that is associated with a table, and that activates when a particular event occurs for the table. The trigger becomes associated with the table named tbl_name , which must refer to a permanent table. You cannot associate a trigger with a TEMPORARY table or a view.
Why are temp tables indexed in SQL Server?
Indexing SQL Server temp tables. SQL Server temp tables are a special type of tables that are written to the TempDB database and act like regular tables, providing a suitable workplace for intermediate data processing before saving the result to a regular table, as it can live only for the age of the database connection.
How is snapshot isolation used in SQL Server?
In this article, I’ll explore the use of snapshot isolation using row versioning as an alternative to the classic ANSI SQL transaction levels. Modern database systems excel at using the system resources available to them. Those include the CPU, RAM, Network and persistent storage of some sort.
Can you create a spatial index on a temp table?
If anyone is interested, you can create spatial indices on temp tables BUT you have to create a PK constraint/clustered first. So, this means the single clustered index you can use is burnt. But, if you’re doing spatial queries, it is worth it just be able to build a spatial index that is well-suited to your data.
Do you need a clustered index for a temp table?
The optimzer promptly ignores this index while you select 10 columns and join 10,000 rows to another temp table with another ignored nonclustered index on it. Now, not every temp table needs a clustered index. I don’t even have a rule of thumb here, because it depends on so many things, like