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 ...

SQL is neither the fastest nor the most ... The query optimizer has to figure out by itself what indexes to use to avoid brute force table scans and achieve good query performance, unless the ...

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: ...

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, ...

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 ...