mysql> select abs(3-5);
+----------+
| abs(3-5) |
+----------+
| 2 |
+----------+
1 row in set (0.00 sec) 0
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mysql abs() 获取绝对值
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mysql> select abs(3-5);
+----------+
| abs(3-5) |
+----------+
| 2 |
+----------+
1 row in set (0.00 sec)相关推荐
