Flink SQL supports queriyng data with SELECT statement and using different types of
operations.
You can query data from a table using the SELECT statement.
Query |
Description |
Option |
SELECT |
Querying data from a table using different operations. |
- Selecting all data in a table
- Selecting data using different types of operations
|
The following table summarizes the supported operations for SELECT statement in SQL Stream
Builder:
Operation |
Description |
Option |
WHERE |
Querying data based adding filters. |
|
JOIN |
Joining data from tables based on a equivalent column. |
- Using temporal joins based on event time or processing time
- Using lookup join
|
GROUP BY |
Grouping results using built-in or user defined functions. |
- Using with streaming table procudes updated results
|
ORDER BY |
Ordering results to be sort based on a specified expression. |
- Using with streaming table the primary sorting key needs to be time
|