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SQL Update doesn't save affected rows?


SQL Update doesn't save affected rows?

By : nesat
Date : November 18 2020, 01:01 AM
I wish did fix the issue. I'm still new to a lot of core SQL, so here's my issue: , You need to use dynamic TSQL:
code :
 declare @sql varchar(1000)
 set @sql = 'UPDATE #tablenamenotrelevant# SET ' + @field + ' = 1 WHERE [MemberId] = 1060;'
 exec (@sql)


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Codeigniter db->update() VS MySQL native UPDATE Affected rows: 0

Codeigniter db->update() VS MySQL native UPDATE Affected rows: 0


By : bluerebelsmoke2710
Date : March 29 2020, 07:55 AM
this one helps. Try getting the query that CodeIgniter is running using the following code:
code :
$this->db->last_query();
Can't save changes to database. Store update, insert, or delete statement affected an unexpected number of rows (0)

Can't save changes to database. Store update, insert, or delete statement affected an unexpected number of rows (0)


By : micheljr
Date : March 29 2020, 07:55 AM
fixed the issue. Will look into that further Your first mistake is you are not sending all primary key ids via hidden fields, if they are posted null, you will get this error, here you are passing ConstitutionAddressId instead of COnstitutionId
code :
 @Html.HiddenFor(model => model.zConstituentAddress.ConstituentId)
    @Html.DisplayFor(model => model.zConstituent.FirstName) @Html.DisplayFor(model => model.zConstituent.LastName)

    <div class="editor-label">@Html.LabelFor(model => model.zConstituent.FirstName)</div>
    <div class="editor-field">
      @Html.EditorFor(model => model.zConstituent.FirstName)
      @Html.ValidationMessageFor(model => model.zConstituent.FirstName)
    </div>
Does Persisted Computed Column need to update all rows or just affected rows?

Does Persisted Computed Column need to update all rows or just affected rows?


By : rafaelzl
Date : March 29 2020, 07:55 AM
may help you . Computed columns are calculated when they are selected.
Persisted columns are calculated when the expressions they are calculated from are changed.
I want affected rows data and column which has affected by update query in codeigniter

I want affected rows data and column which has affected by update query in codeigniter


By : user3043880
Date : December 01 2020, 04:42 PM
will be helpful for those in need As far as I know there are no built-in CodeIgniter functionality for that. You could compare old value with new value though :
code :
$last_record = $this->db->get_where('table1', array('id' => $id))->row_array();
$this->db->query("UPDATE `table1` SET name = $name,......................,column10=10 WHERE id=$id")->result();
// $this->db->affected_rows();
$new_record = $this->db->get_where('table1', array('id' => $id))->row_array();
$affected_columns = array_diff($new_record, $last_record);
foreach ($affected_columns as $field => $value) {
    echo "[field] : $field\r\n";
    echo "[old_value] : $last_record[$field]\r\n";
    echo "[new_value] : $value\r\n";
    echo "\r\n";
}
mysql trigger when update or insert - update field in affected row/rows

mysql trigger when update or insert - update field in affected row/rows


By : Aurens
Date : March 29 2020, 07:55 AM
Hope this helps When you want to change a column of the row being inserted/updated, don't use UPDATE, just use SET NEW.status = ... That will change the value only on the current row that spawned the trigger.
Also you must qualify the other columns as NEW.stock and NEW.delivery_days.
code :
BEGIN
  IF NEW.stock != OLD.stock or NEW.delivery_days != OLD.delivery_days
  THEN 
    SET NEW.status = CheckStatus(NEW.stock, NEW.delivery_days);
  END IF;
END
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