Added new articles to the Data management section:
Tables overview
Data compression
Distribution
Partitioning
Sequences
Indexes
Views and materialized views
SELECT command overview
JOIN clause
Subqueries
Common table expressions
Combine queries
Aggregate functions
Added new articles to the Database maintenance section:
Configure DBMS via GUCs
Use resource groups
Use resource queues
Collect statistics via ANALYZE
Remove expired table rows via VACUUM
Manage spill files
Added the Integration with external systems section, which includes the following articles:
COPY command
External tables overview
Use gpfdist
Use gpload
Format external data
Transform external data