This is why I get nervous about use of " distinct " - the spraddr table may include additional columns which you should use tofilter out data, and " distinct " may be hiding that. Also, you may be generating a massive result set which needs to be filtered by the "distinct" clause, ...
The first is backup to URL and the second is Data Lake Virtualization.Data Lake Virtualization integrates PolyBase with S3-compatible object storage, and adds support for querying parquet files with T-SQL. Data Virtualization Query different types of data on different types of data sources from ...
SQL Server automatically queries both local and remote data in the linked databases. In-memory OLTP: Now supports FOREIGN KEY, UNIQUE and CHECK constraints, and native compiled stored procedures OR, NOT, SELECT DISTINCT, OUTER JOIN, and subqueries in SELECT. Supports tables up to 2TB (up ...
Learn what a SQL Query is and the fundamentals of the SQL SELECT statement, which is used to query the database for useful information. Learning how to retrieve information from or manipulate information in a database is commonly a perplexing exercise. However, it can be a relatively easy tas...
Always Encrypted:When enabled, only the application that has the encryption key can access the encrypted sensitive data in the SQL Server 2016 database. The key is never passed to SQL Server. Dynamic Data Masking:If specified in the table definition, masked data is hidden from most users, and...
Approximate query processing with APPROX_COUNT_DISTINCT For scenarios when absolute precision isn't important but responsiveness is critical, APPROX_COUNT_DISTINCT aggregates across large datasets while using fewer resources than COUNT(DISTINCT()) for superior concurrency. See Approximate query processing. ...
distinct change tables having two different column structures. Thus, while one change table can continue to feed current operational programs, the second one can drive a development environment that is trying to incorporate the new column data. Allowing the capture mechanism to populate both change ...
SQL Server 2019 Analysis Services GA (Generally Available) Tabular model compatibility level This release introduces the 1500 compatibility level for tabular models. Query interleaving Query interleaving is a tabular mode system configuration that can improve user query response times in high-concurrency sc...
Start and end messages for server initialization when the server is started with --initialize or --initialize-insecure; these are in addition to and distinct from those shown during normal server startup and shutdown. Start and end messages for InnoDB initialization. Start and end messages for...
distinct change tables having two different column structures. Thus, while one change table can continue to feed current operational programs, the second one can drive a development environment that is trying to incorporate the new column data. Allowing the capture mechanism to populate both change ...