Question

伙计们，我在表格中选择非空值时遇到问题

$tabelka = mysql_fetch_array(mysql_query("select * from ".$server_db.".paczka_przedmiot where cos = ".$losuj['test1']." 
or cos = ".$losuj['test2']."
or cos = ".$losuj['test3']."
or cos = ".$losuj['test4']."
or cos = ".$losuj['test5']."
or cos = ".$losuj['test6']." order by rand() limit 1"));
$szansa = rand(1,100000);

我arleady尝试添加和（cos IS NOT NULL）但这里不起作用的是我的完整代码

$tabelka = mysql_fetch_array(mysql_query("select * from ".$server_db.".paczka_przedmiot where cos = ".$losuj['test1']." 
or cos = ".$losuj['test2']."
or cos = ".$losuj['test3']."
or cos = ".$losuj['test4']."
or cos = ".$losuj['test5']."
or cos = ".$losuj['test6']."  and (cos IS NOT NULL) order by rand() limit 1"));
$szansa = rand(1,100000);

Answer 1

您可以使用其他查询但不是标准：

SELECT *
FROM table 
WHERE NOT (YourColumn <=> NULL);

您还应该使用大写“AND”

你也可以试试这个：

mysql_fetch_array(mysql_query("select * from ".$server_db.".paczka_przedmiot where cos IS NOT NULL AND (cos = ".$losuj['test1']. " 
OR cos = ".$losuj['test2']. "
OR cos = ".$losuj['test3']. "
OR cos = ".$losuj['test4']. "
OR cos = ".$losuj['test5']. "
OR cos = ".$losuj['test6']. ") ORDER BY rand() LIMIT 1"));

Answer 2

我担心问题出在括号中。这种修正应该有效（注意括号）：

$tabelka = mysql_fetch_array(mysql_query("select * from ".$server_db.".paczka_przedmiot where (cos = ".$losuj['test1']." 
or cos = ".$losuj['test2']."
or cos = ".$losuj['test3']."
or cos = ".$losuj['test4']."
or cos = ".$losuj['test5']."
or cos = ".$losuj['test6']." ) and (cos IS NOT NULL) order by rand() limit 1"));
$szansa = rand(1,100000);

从表Mysql中选择非空值

2 个答案: