Question

有没有办法合并以下查询（我们可以使用COUNT或其他方式组合这些查询）。

$resultacgc = mysql_query("SELECT mno FROM table1 WHERE (m_jid='$sid' AND decision='accept-gf')");
  $numacgc = mysql_num_rows($resultacgc);
$resultacp = mysql_query("SELECT mno FROM table1 WHERE (m_jid='$sid' AND decision='accept-p')");
  $numacp = mysql_num_rows($resultacp);
$resultacpc = mysql_query("SELECT mno FROM table1 WHERE (m_jid='$sid' AND decision='accept-pc')");
  $numacpc = mysql_num_rows($resultacpc);
$resultacr = mysql_query("SELECT mno FROM table1 WHERE (m_jid='$sid' AND decision='accept-rdy')");
  $numacr = mysql_num_rows($resultacr);
$resultacft = mysql_query("SELECT mno FROM table1 WHERE (m_jid='$sid' AND decision='accept-ft')");
  $numacft = mysql_num_rows($resultacft);

P.S。：我知道“mysql_ *”已被弃用。

谢谢

Answer 1

您可以使用mysql IN。

像这样：

string = "/challenges/:challenge_id/submissions/:id"

# To get a matching params array
string.scan(/:\w+/)              #  => [":challenge_id", ":id"]

# To replace them with "1"s
string.gsub(/:\w+/, '1')         #  => "/challenges/1/submissions/1"

如果你想得到每个计数，你需要做这样的事情：

"SELECT mno FROM table1 WHERE (m_jid='$sid' AND decision IN ('accept-gf', '...', '...'))"

通过在单个表中使用count来组合多个mysql_num_rows查询

1 个答案: