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办公技巧‖Excel数字精度3剑客:ROUND家族

  • 2026-09-19 20:50:40
办公技巧‖Excel数字精度3剑客:ROUND家族

知识点讲解

1、ROUND(数字, 位数) — 四舍五入。

根据第二个参数位数，四舍五入到指定的小数位数。

2、ROUNDUP(数字, 位数) — 向上取整。

不管数值大小，直接往“更大”方向进位。

3、ROUNDDOWN(数字, 位数) —向下取整。

无条件舍弃多余位数，数字寸步不让，向“更小”方向走。

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  2. 运行时间 : 0.073709s [ 吞吐率：13.57req/s ] 内存消耗：4,253.45kb 文件加载：140
  3. 缓存信息 : 0 reads,0 writes
  4. 会话信息 : SESSION_ID=b7eff8aacf5196ff5a45aa1ecdf61cc4
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  1. CONNECT:[ UseTime:0.000692s ] mysql:host=172.18.0.4;port=3306;dbname=h_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000905s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000485s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000344s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000529s ]
  6. SELECT * FROM `set` [ RunTime:0.000269s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000659s ]
  8. SELECT * FROM `article` WHERE `id` = 468069 LIMIT 1 [ RunTime:0.000342s ]
  9. UPDATE `article` SET `lasttime` = 1790066516 WHERE `id` = 468069 [ RunTime:0.001073s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000337s ]
  11. SELECT * FROM `article` WHERE `id` < 468069 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000423s ]
  12. SELECT * FROM `article` WHERE `id` > 468069 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000376s ]
  13. SELECT * FROM `article` WHERE `id` < 468069 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000462s ]
  14. SELECT * FROM `article` WHERE `id` < 468069 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000570s ]
  15. SELECT * FROM `article` WHERE `id` < 468069 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.000553s ]
0.086348s