What are the best practices for importing data?
For example, in SQL Server you can use built-in features (such as View the Dependencies of a Table) or third party tools (such as SQL Dependency Tracker from Red Gate). Keeping all the views for a data model in the same schema simplifies the tracking of the dependent reports.
How many records are imported in a month?
Simple calculations yield the following results: 20 000 locations x 720 records x 120 months (10 years back) = 1 728 000 000 records. These are the past records, new records will be imported monthly, so that’s approximately 20 000 x 720 = 14 400 000 new records per month.
How to import 16 billion rows in SQL?
The following article discusses the import and use of a 16 billion row table in Microsoft SQL. https://www.itprotoday.com/big-data/adventures-big-data-how-import-16-billion-rows-single-table. The more data you have in a table with a defined clustered index, the slower it becomes to import unsorted records into it.
Which is the equivalent of aggregation in MongoDB?
Aggregation operations group values from multiple documents together, and can perform a variety of operations on the grouped data to return a single result. In SQL count (*) and with group by is an equivalent of MongoDB aggregation. For the aggregation in MongoDB, you should use aggregate () method.
How to import sequences in table level export?
This question is during import sequences never got imported. This is the default behavior of oracle. I would appreciate if you please advise on the followings: 1. How to import sequences in table level export?
How to import a sequence in Ask Tom?
You’ll just want to script the sequences select ‘create sequence ‘ || sequence_name || ‘ start with ‘ || last_number+1 || ‘;’ from user_sequences where…..; Thanks for the prompt reply. exp with tables do not import sequences.
Can You import a table into a data model?
Always import views and never import tables in a data model. If you are getting data from a relational database, such as SQL Server or Oracle, you should never import a database table directly in your data model. The reason is that this creates a strong dependency between the physical data model and the report.