There are only seven of the 27 columns in the table in this query, so those other columns do not need to be read. The other performance benefit of columnstore indexes in SQL Server provide is ...

SQL*Plus prompts you for your password ... Note that the "ALTER INDEX" statement rebuilds one index at a time; if a table has multiple indexes, you need an "ALTER INDEX" for each one.

Open-source distributed OLAP database and powerful SaaS counterpart shine with plug-in indexes, signature tunable star-tree ...

like use a specified index in a query plan) without putting the query hint into the SQL code base for an application. Traditionally, you would need to modify the code. Now, when the query store ...

SQL is neither the fastest nor the most ... design hangs on the judicious use of indexes. If you omit an index for a frequent query, the whole database can slow down under heavy read loads.

Analyze database contents using basic, intermediate and advanced SQL statement syntax and usage. Demonstrate capability to query data from multiple tables using SQL JOINS. Create and modify database ...

SAS maintains indexes for all changes to the table, whether the changes originate from PROC SQL or from some other source ... You can use the CONTENTS statement in the DATASETS procedure to display a ...

Read this SQL tutorial to learn when to use SELECT, JOIN, subselects and UNION to access multiple tables with a single statement. It’s sometimes difficult to know which SQL syntax to use when ...