Question

我想结合以下SQL查询。现在我打电话给他们两次，但我想我可以用它来处理它。我试过但无法找到解决方案。任何人都可以为我提供组合SQL。我知道我使用的是MSQL而不是MISQLI或PDO。

$lsel_first = mysql_query("select * from table_test WHERE owner = '$id' AND ownersecond = '0' AND catogory = '1' AND type = '$car[id]' AND caseB = '0' AND (timeback < TIMESTAMP(NOW()) OR timeback = '0000-00-00 00:00:00') ");
$first = mysql_num_rows($lsel_first);


$lsel_second = mysql_query("select * from table_test WHERE ownersecond = '$id' AND catogory = '1' AND type = '$car[id]' AND caseB = '0' AND (timeback < TIMESTAMP(NOW()) OR timeback = '0000-00-00 00:00:00')  ");
$second = mysql_num_rows($lsel_second);

Answer 1

下面：

mysql_query("select * from table_test 
WHERE ((owner = '$id' AND ownersecond = '0') OR ownersecond = '$id') 
AND catogory = '1' AND type = '$car[id]' AND caseB = '0' 
AND (timeback < TIMESTAMP(NOW()) OR timeback = '0000-00-00 00:00:00') ");

Answer 2

使用union

select * from table_test WHERE ownersecond = '$id' AND catogory = '1'  
AND type = '$car[id]' AND caseB = '0' AND (timeback < TIMESTAMP(NOW())  
OR timeback = '0000-00-00 00:00:00') union select * from table_test  
WHERE ownersecond = '$id' AND catogory = '1' AND type = '$car[id]'  
AND caseB = '0' AND (timeback < TIMESTAMP(NOW())  
OR timeback = '0000-00-00 00:00:00')

结合两个SQL

2 个答案: