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After mysql UPDATE, use mysql_affected_rows to determine whether it is successful. If not, INSERT will result. Something went wrong.
After mysql UPDATE, use mysql_affected_rows to determine whether it is successful. If not, INSERT will result. Something went wrong.
After mysql UPDATE, judge whether it is successful through mysql_affected_rows. If not, then INSERT. The result is a problem. The number of table rows has doubled. The code is as follows, and the solution is
<code>//数据写入数据库
function save_db($currencyname_en,$currencyname_cn,$buyingrate,$sellingrate,$middlerate)
{
//更新
$query_update = ' UPDATE '. TABLENAME .' SET '
.' buyingrate=' .$buyingrate .','
.' sellingrate=' .$sellingrate .','
.' middlerate=' .$middlerate .','
.' lastupdatetime="' .date('Y-m-d H:i:s',time()) .'"'
.' WHERE currencyname_en="' .$currencyname_en .'"';
mysql_query($query_update);
if(mysql_affected_rows()!=1)//更新不成功，尝试插入
{
$query_insert = 'INSERT INTO ' . TABLENAME . '(currencyname_en, currencyname_cn, buyingrate, sellingrate, middlerate, lastupdatetime) VALUES (
"'.$currencyname_en.'",
"'.$currencyname_cn.'",
"'.$buyingrate.'",
"'.$sellingrate.'",
"'.$middlerate.'",
"'.date('Y-m-d H:i:s',time()).'"
)';
mysql_query($query_insert);
}
if(mysql_affected_rows()!=1)
{
$err .= "<br>插入或者更新".$currencyname_en."-".$key."currencyname_cn";
}
}</code>Reply content:
After mysql UPDATE, judge whether it is successful through mysql_affected_rows. If not, then INSERT. The result is a problem. The number of table rows has doubled. The code is as follows, and the solution is
<code>//数据写入数据库
function save_db($currencyname_en,$currencyname_cn,$buyingrate,$sellingrate,$middlerate)
{
//更新
$query_update = ' UPDATE '. TABLENAME .' SET '
.' buyingrate=' .$buyingrate .','
.' sellingrate=' .$sellingrate .','
.' middlerate=' .$middlerate .','
.' lastupdatetime="' .date('Y-m-d H:i:s',time()) .'"'
.' WHERE currencyname_en="' .$currencyname_en .'"';
mysql_query($query_update);
if(mysql_affected_rows()!=1)//更新不成功，尝试插入
{
$query_insert = 'INSERT INTO ' . TABLENAME . '(currencyname_en, currencyname_cn, buyingrate, sellingrate, middlerate, lastupdatetime) VALUES (
"'.$currencyname_en.'",
"'.$currencyname_cn.'",
"'.$buyingrate.'",
"'.$sellingrate.'",
"'.$middlerate.'",
"'.date('Y-m-d H:i:s',time()).'"
)';
mysql_query($query_insert);
}
if(mysql_affected_rows()!=1)
{
$err .= "<br>插入或者更新".$currencyname_en."-".$key."currencyname_cn";
}
}</code>
INSERT INTO table (...) VALUES (...) ON DUPLICATE KEY UPDATE field1 = ?, field2 = ?, ...
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