PHP 和 MySQL 编程/常用函数和运算符
mysql_query(" SELECT COUNT(*|`field_name`) FROM `table_name` ");
mysql> SELECT SUM(`field_name`) FROM `table_name`;
mysql_query(" SELECT COUNT(*|`field_name`) FROM `table_name` ");
mysql> SELECT SUM(`field_name`) FROM `table_name`;
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PHP 和 MySQL 编程 常用函数和运算符 |
XML 和 PHP  |