SELECT 'collect_log' AS '表名',id, rsync_status AS '狀態', error AS '錯誤'
FROM universal_etl_range.`collect_log`
WHERE (collect_status = 3 OR compress_status = 3 OR rsync_status = 2)
LIMIT 1
UNION ALL
SELECT 'load_log' AS '表名',id, load_status AS '狀態', error AS '錯誤'
FROM universal_etl_range.`load_log`
LIMIT 3
) tmp LIMIT 100;
結果:1表1條數據,2表3-1=2條數據