GREATEST
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语法:
GREATEST(value1,value2,...)
说明:
在有两个或更多参数中，返回那个最大的。参数之间的比较规则和函数LEAST()一致。
例子:
MariaDB [(none)]> SELECT GREATEST(2,0);
+---------------+
| GREATEST(2,0) |
+---------------+
| 2 |
+---------------+
1 row in set (0.00 sec)
MariaDB [(none)]> SELECT GREATEST(34.0,3.0,5.0,767.0);
+------------------------------+
| GREATEST(34.0,3.0,5.0,767.0) |
+------------------------------+
| 767.0 |
+------------------------------+
1 row in set (0.00 sec)
MariaDB [(none)]> SELECT GREATEST('B','A','C');
+-----------------------+
| GREATEST('B','A','C') |
+-----------------------+
| C |
+-----------------------+
1 row in set (0.00 sec)
MariaDB [(none)]>
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