php中的postgresql数据库查询问题
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我已经编写了这段代码来显示从postgresql数据库中提取的项目列表，这是一个冗长的代码，因此我在此处添加了一些代码以解决我遇到的问题。我得到的结果在test1m下面给出
Resource id #4
Galle
Kandy
Anuradhapura
Dambulla
Hambantota
Colombo
Hikkaduwa
test2
Resource id #4
test1m
Resource id #4
Galle
Kandy
Anuradhapura
Dambulla
Hambantota
Colombo
Hikkaduwa
test2
Resource id #4 Galle
Kandy
Anuradhapura
Dambulla
Hambantota
Colombo
Hikkaduwa
$date = date(\"Y-m-d\");
$dbh = pg_connect(\"host=localhost dbname= drupal_test user=usrx password=123\");
if (!$dbh) {
die(\"Error in connection: \" . pg_last_error());
}
$sql1 = \"SELECT *
FROM node, modify_dates, node_counter
WHERE node.nid = modify_dates.nid
AND node.nid = node_counter.nid
AND modify_dates.nid = node_counter.nid
AND node_counter.totalcount < \'1000\'
AND node.type = \'city_guide\'
ORDER BY modify_dates.lmd\";
$sel1 = pg_query($sql1);
$sql2 = \"SELECT *
FROM node, modify_dates, node_counter
WHERE node.nid = modify_dates.nid
AND node.nid = node_counter.nid
AND modify_dates.nid = node_counter.nid
AND node_counter.totalcount > \'1000\'
AND node.type = \'city_guide\'
ORDER BY modify_dates.lmd\";
$sel2 = pg_query($sql2);
if(pg_num_rows($sel1) > 0) {
echo \"test1\";
chooseItems($sel1);
} else if(pg_num_rows($sel2) > 0) {
echo \"test1m<br/>\";
chooseItems($sel2);
}
if(pg_num_rows($sel2) > 0) {
echo \"test2<br/>\";
chooseItems($sel2);
} else if(pg_num_rows($sel1) > 0) {
echo \"test2m<br/>\";
chooseItems($sel1);
}
function chooseItems($sel) {
echo $sel.\"<br/>\";
$m = 0;
while($row = pg_fetch_array($sel)) {
echo $row[\'title\'].\"<br/>\";
$m = $m+1;
}
}
pg_close($dbh);
没有找到相关结果
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1 个回复
缔恃钨
保持不变，但是当您尝试通过pg_fetch_array（）读取更多数据时，没有什么要读取的，它已经被消耗掉了。 您可以再次查询以刷新内容。