如何从 bash 中的 SQL 查询中缩小 output

Question

How I can shrink my output from this SQL Query to only 1 or 0?

SELECT 
object_id,
IF (last_scan_date + INTERVAL 60 MINUTE > NOW(), 1, 0) AS download_correct
FROM `git_download_server`
WHERE object_id="573"

My actually output when I run it from bash it's (i need only status code 1 or 0):

573    1

Answer 1

MySQL automatically evaluates conditionals to 1 or 0 so you could just do this without object_id in the select . Add a distinct if you have multiple rows per object_id , but only want one row in your output.

SELECT last_scan_date + INTERVAL 60 MINUTE > NOW() AS download_correct
FROM `git_download_server`
WHERE object_id="573";