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HomeDatabaseMysql Tutorialmysql_store_result和mysql_use_result的区别_MySQL

在使用mysql_query()进行一个查询后,一般要用这两个函数之一来把结果存到一个MYSQL_RES *变量中。

两者的主要区别是,mysql_use_result()的结果必须“一次性用完”,也就是说用它得到一个result后,必须反复用mysql_fetch_row()读取其结果直至该函数返回null为止,否则如果你再次进行mysql查询,会得到“Commands out of sync; you can't run this command now”的错误。

而mysql_store_result()得到result是存下来的,你无需把全部行结果读完,就可以进行另外的查询。比如你进行一个查询,得到一系列记录,再根据这些结果,用一个循环再进行数据库查询,就只能用mysql_store_result()。

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