Reindexing tables is an important part of good database housekeeping, because it reorganizes the indexes and restores speedy access. Microsoft's SQL Server has a handy command that rebuilds all ...

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 ...

The most important performance-tuning technique available is having the needed indexes created on the tables to ensure that the SQL Server database engine is able to get the data that it needs to ...

SQL Server 2012 includes a lot of new and exciting features. One feature that has caught the imagination of many in the user community is the high-performance feature called Columnstore Indexes.

SQL Server handles moving historical data to disk ... reduce performance -- your primary reason for using a memory-optimized table. Where an index will have more than 100 entries for the same value, ...

For example: proc sql; describe table dictionary.indexes; The results are written to the SAS log: 1 proc sql; 2 describe table dictionary.indexes; NOTE: SQL table DICTIONARY.INDEXES was created like: ...

SAS maintains indexes for all changes to the table, whether the changes originate from PROC SQL or from some other source. Therefore, if you alter a column's definition or update its values, the same ...

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 ...

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 ...