How do temporary tables work?
Temporary Tables. A temporary table is a base table that is not stored in the database but instead exists only while the database session in which it was created is active. At first glance, this may sound like a view, but views and temporary tables are rather different: A view exists only for a single query.
How does connection pooling work in Oracle?
About Connection Pools. The connection pool is an object in the Physical layer that describes access to the data source. It contains information about the connection between the Oracle BI Server and that data source. The Physical layer in the Administration Tool contains at least one connection pool for each database.
What is the use of temporary table in ETL process?
As its name indicates, temporary tables are used to store data temporarily and they can perform CRUD (Create, Read, Update, and Delete), join, and some other operations like the persistent database tables.
How do temporary tables work in SQL?
SQL Server drops a temporary table automatically when you close the connection that created it. SQL Server drops a global temporary table once the connection that created it closed and the queries against this table from other connections completes.
How do you set up a connection pool?
To use connection pooling, no configuration is required. Configuration is necessary only if you want to customize how pooling is done, such as to control the size of the pools and which types of connections are pooled. You configure connection pooling by using a number of system properties at program startup time.
How does connection pooling work?
Connection pooling means that connections are reused rather than created each time a connection is requested. To facilitate connection reuse, a memory cache of database connections, called a connection pool, is maintained by a connection pooling module as a layer on top of any standard JDBC driver product.
What is the advantage of using a temporary table?
A good strategy is to create temporary tables for storing this type of intermediate data for further processing within our session. The key advantage of using temporary tables is that they are visible only to the current session and they are dropped automatically when the session is closed.
Can we create primary key on temp table in SQL Server?
If you add the primary key when creating the table, the first insert will be free (no checks required.) The second insert just has to see if it’s different from the first. The third insert has to check two rows, and so on. The checks will be index lookups, because there’s a unique constraint in place.