hive中with as的用法

Sure, I can answer that for you. In Hive, "WITH AS" is used to create a temporary table from a SELECT statement, which can then be referenced in subsequent queries in the same session. Here's an example:

WITH temp_table AS (
SELECT col1, col2
FROM my_table
WHERE col3 = 'some_value'
)

SELECT *
FROM temp_table
WHERE col2 = 'another_value'

Hope that helps! Let me know if you have any other questions.