SQL Column Aliases (AS)
Rename a column in the output only — the underlying table is never touched.
What & Why
AS renames a column (or a computed expression) in the query's result, without changing anything about the real table. It's purely cosmetic for the output you see.
See How It Works
| id | name | channel | spend | start_date | end_date | status | target_segment |
|---|---|---|---|---|---|---|---|
| 1 | Spring Launch | google_ads | 55000.00 | 2024-01-15 | 2024-03-31 | active | smb |
| 2 | Retention Webinar | 45000.00 | 2024-02-10 | 2024-04-15 | active | enterprise | |
| 3 | Finance Retargeting | 50000.00 | 2024-03-12 | 2024-05-31 | active | enterprise | |
| 4 | Enterprise Search | google_ads | 60000.00 | 2024-04-01 | 2024-06-30 | active | enterprise |
EXAMPLE QUERY
SELECT name AS campaign_name, spend AS campaign_spend
FROM marketing.campaigns;RESULT — column names changed, data didn't
| campaign_name | campaign_spend |
|---|---|
| Spring Launch | 55000.00 |
| Retention Webinar | 45000.00 |
| Finance Retargeting | 50000.00 |
| Enterprise Search | 60000.00 |
The result uses the same Queryflo columns shown in the worked example.
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