v2.0
- About Uqbar
- Release Note
- Uqbar Installation
- Uqbar Management
- Data Retention Policy
- Time-Series Table Management
- Time-Series Data Write
- Data Compression
- Data Deletion
- Data Query
- Continuous Aggregation
- Time-Series Views
- Cluster Management
- Backup and Restoration
- Security
- GUC Parameters
- SQL Syntax
- Third Party Tools Support
- Glossary
Selection Operators
The current version of Uqbar supports the following commonly used selection operators:
| Operators | Description | Reference Links |
|---|---|---|
| first | Take the earliest value. | first() / last() |
| last | Take the latest value. | first() / last() |
| max | Take the maximum value. | Aggregate Functions | MogDB Docs |
| min | Take the minimum value. | Aggregate Functions | MogDB Docs |