stmt = mysql_stmt_init(mysql)mysql_stmt_prepare(stmt, "SELECT ?", strlen("SELECT ?"))mysql_stmt_bind_param(stmt, param_bind)mysql_stmt_execute(stmt)mysql_stmt_bind_result(stmt, result_bind)mysql_stmt_store_result(stmt)while (!mysql_stmt_fetch(stmt))mysql_stmt_close(stmt)stmt = mysql_stmt_init(mysql);mysql_stmt_prepare(stmt, "delete from aaa", strlen("delete from aaa"));mysql_stmt_bind_param(stmt, bind)mysql_stmt_execute(stmt) //修改bind的变量，可执行多次mysql_stmt_execute(stmt)mysql_stmt_execute(stmt)mysql_stmt_affected_rows(stmt)