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MySQL数字的进制转换(conv的使用)_MySQL

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Release: 2016-06-01 13:43:26
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bitsCN.com MySQL数字的进制转换(conv的使用)
CONV(N,from_base,to_base)
在不同的数字基数之间转换数字。将数字 N 从from_base 转换到 to_base,并以字符串形式返回。如果任何一个参数为 NULL,那么返回值也为 NULL。参数 N 被解释为是一个整数,但是也可以被指定为一个整数或一个字符串。最小基为 2,最大基为 36。如果 to_base 是一个负值,N 将被看作为是一个有符号数字。否则,N 被视为是无符号的。CONV 以 64 位精度工作。
 
mysql> select conv(100,10,2);
+----------------+
| conv(100,10,2) |
+----------------+
| 1100100        |
+----------------+
1 row in set (0.00 sec)
mysql> select conv(100,10,16);
+-----------------+
| conv(100,10,16) |
+-----------------+
| 64              |
+-----------------+
1 row in set (0.00 sec)
mysql>


作者 xyaxlz bitsCN.com

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