44 lines
1.4 KiB
SQL
44 lines
1.4 KiB
SQL
-- 设备状态变更记录清理测试脚本
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-- 用于验证24小时清理功能
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-- 1. 检查表结构
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SELECT 'Table Structure:' as info;
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DESC device_status_transition;
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-- 2. 查看当前记录数
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SELECT 'Current Records Count:' as info;
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SELECT COUNT(*) as total_records FROM device_status_transition;
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-- 3. 查看24小时前的记录数（将被清理的记录）
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SELECT '24+ Hours Old Records (to be cleaned):' as info;
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SELECT COUNT(*) as old_records
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FROM device_status_transition
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WHERE created_at < DATE_SUB(NOW(), INTERVAL 24 HOUR);
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-- 4. 查看最近24小时的记录数（将被保留的记录）
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SELECT 'Recent 24 Hours Records (to be kept):' as info;
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SELECT COUNT(*) as recent_records
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FROM device_status_transition
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WHERE created_at >= DATE_SUB(NOW(), INTERVAL 24 HOUR);
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-- 5. 查看记录的时间分布
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SELECT 'Records Distribution:' as info;
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SELECT
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DATE(created_at) as date,
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COUNT(*) as count
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FROM device_status_transition
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GROUP BY DATE(created_at)
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ORDER BY date DESC
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LIMIT 10;
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-- 6. 预览将被删除的记录（最多显示5条）
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SELECT 'Sample Records to be Deleted:' as info;
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SELECT device_id, prev_status, new_status, created_at
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FROM device_status_transition
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WHERE created_at < DATE_SUB(NOW(), INTERVAL 24 HOUR)
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ORDER BY created_at DESC
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LIMIT 5;
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-- 测试删除语句（注释掉，仅用于验证语法）
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-- DELETE FROM device_status_transition WHERE created_at < DATE_SUB(NOW(), INTERVAL 24 HOUR);
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