I am taking over designing a CMS from another programmer. As the site is filling up, we're finding loops in mysql queries causing long hangs. I have found a temp solution for this one, but am wondering if there is a quicker way of doing it?
take the table (tracks resources):
id resource click
1 res_1 192
2 res_2 12
3 res_3 300
what we need to get is a popularity of the resource - res_click/total_click
what he had was a while loop:
while ($item = mysql_fetch_array ($result)) $total_clicks = $total_clicks + $item[0];
As there could be 100 or more resources to a page, this was running for each resource, and it is causing major hangs.
My solution is to get a sum:
SELECT SUM(click) FROM uri
SELECT click FROM resource WHERE id=$x
then divide them both.
But this two calls are still running for around a 100 items per page. Is there a way I can have a field in mysql that is the result of a formula based on another another, like in excell? So I could add a field "percentage", tell mysql that it is the sum of click divided by the current click value, then every time click is updated the 'percentage' field is automatically updated?
any help would be appreciated,
cheers ;)
you can create a view on your table that present the sum you want
Related
I know this is a tough one but I'm basically trying to say. Give me a service call and its completion date, then give me the Max date for all service calls where the date is less than the date of the service call I'm inquiring about.
Basically the end result I'm looking for is to say was there another service call on this piece of equipment that was within the last 30 days.
So as you can see in the image for say Asset 50698 service call 579032 we have a date of 11/9/2020 the call below that was 10/22/2020 which was less than 30 days. I want to somehow find a way to count how many service calls I have where this has occurred. Is this possible?
I think you're looking for a context operator In, ForEach or ForAll (in in this case)
Add a variable "MaxAssetDate" and assign it a Formula similar to the following based on your column headers.
=Max([Service Call Completion Date] In ([Asset ID];[Service Call])) In (Asset ID])
Then add this as a column. Provided you have a prompt filtering for a given asset or "date" this column will then show the max date for each service call of the same asset ID. Then add a new variable: ServiceCallDaysDiff: Then by using DatesBetween() with "MaxAssetDate" and ServiceCallCompletionDate and DayPeriod; =DatesBetween([ServiceCallCompletionDate];[MaxAssetDate];DayPeriod) you should get a number 0-X. Then add a filter based if the number is between 1 and 30 then you show those records, otherwise hide the rest; or do whatever logic is then needed.
Now if you're dealing with hundreds of thousands of records this isn't ideal as you're putting all the processing on the webi engine when it ideally would occur as an object in the database layer. However if you only have a few thousand records this should be managable.
To add a count of service calls...
add variable: ServiceCallsCount:
=Sum(Sum(If([ServiceCallDaysDiff]=0;0;1)) In ([AssetID]))
this will count the non zero day differents. Note this will extend beyond 30 so if you want to limit by 30 days adjust the if statement to zero out those not between 1 and 30.
This is but one approach: there may be simpler ways.
I am attempting to maintain and fix a horribly out-of-date CRM designed by an ex-employee ~4-5 years ago in Access 2007. I have brought it into Access 2013 and fixed a ton of stuff up, but I am still running into many problems.
I spent a good 4 hours today attempting to figure out why certain values didn't line up. These values were being pulled from a SELECT statement on a Combo Box over a stored Query which simply returns a table with a few extra rows. Great.
However this value (a number) doesn't appear to correlate with what we expect. I enter in one value, save the ticket, and a completely different value gets stored into the table. Opening up the ticket, I see the value that I expect. Digging deeper, I found the following difference:
Set value_1 = Me.RegistrationID // What's being stored in the table
Set value_2 = Me.RegistrationID.Column(0) // What we expect
Surprise surprise! This is a Combo Box and some value is being stored in the table. The Control Source is "RegistrationID" and the Row Source is the query in question.
However I do not know what it is! This specific value correlating to the Combo Box appears to pull the correct data when we later open the tickets. However I have a strong feeling that this could be why many tickets from before one of the rows was deleted all appear to have invalid RegistrationID's.
How badly can this break?
How easily can we correct tens of thousands of tickets?
How can I fix this to store the correct value?
This is what I expect is happening.
Your combo box row source is based on a Select query which returns and displays multiple rows. For example:
Select RegistrationID, CustomerID, CustomerName From MyTable;
The Control Source for the combo box is bound to RegistrationID which is part of the Forms Record Source.
The issue is the bound column. If we set the bound column in our example to 1, then we get the behavior your are describing with:
Set value_1 = Me.RegistrationID - Set's value to CustomerID (may appear correct)
Set value_2 = Me.RegistrationID.Column(0) - position 0 from our query (RegistrationID)
Further building on our query example, you can say:
Me.TextBox1 = Me.RegistrationID.Column(0) - RegistrationID
Me.TextBox2 = Me.RegistrationID.Column(1) - CustomerID
Me.TextBox3 = Me.RegistrationID.Column(2) - CustomerName
The RegistrationID is what normally should be stored in the table.
As long as your form shows any values that directly relate to this RegistrationID you're fine.
I would start by checking to see under the format setting to see if column widths are set properly and I would also check under the data section to see if the bound column is correct. I might also throw in an after update macro/vba sub routine that saves the record. Hope this helps.
I have a report where users can select items from various location. And I have 3 datasets performing calculations where the third dataset takes the sum where item number is 4942200 and then calculates the values (as shown below):
=SUM(IIf(Fields!masterno.Value= "4942200",Fields!Owned.Value,0))+SUM(IIf(Fields!masterno.Value= "4942200",Fields!Subbed.Value,0))
This is returning error for some reason. The subbed column is toggled based on parameter (visibility). But before I add the toggle functionality, I want to make sure this is working. Can anyone help. I have also tried:
=SUM(IIf(Fields!masterno.Value= "4942200",Fields!Owned.Value+Fields!Subbed.Value,0))
This seems to fail as well. Help would be greatly appreciated.
I would wrap a CDec around Owned, 0 and Subbed, e.g.
=SUM(IIf(Fields!masterno.Value= "4942200",CDec ( Fields!Owned.Value) ,CDec (0 ) ))+SUM(IIf(Fields!masterno.Value= "4942200",CDec (Fields!Subbed.Value ) ,CDec ( 0 )))
If Owned and Subbed are already Decimals, those CDec's may be redundant. On the other hand SSRS doesnt expose this info and they can change at the whim of the data source.
So, I have this Report:
And this Query:
The report pulls all of it's data from the query. The fields STA1, STA2, STA3, and STA4 are from the Job Order table in which each job has an order set based on Work Stations (Named CU01, CU02, BR01...).
I have attempted to make macros that essentially say
If Reports![Production Router LBPW]![Work Station 1]="CU01" Then Reports![Production Router LBPW]![Run Time 1]=Query![Query Laser Hours by P/N]![Total Laser Hours]
If I understand properly, a series of statements like that could essentially associate each work station with a specific type of time data (Cutting, Bending, Inserting, and Welding), effectively rearranging my fields to automatically display the time data I want in the places I want them. Alas, I don't know enough about macros to make that work and I know even less about VBA. If I can be filled in on a couple lines of code, or something, that would allow me to accomplish this, I'm sure I may be able to figure it out from there.
One approach would be to create various queries, for example:
QueryCU01
SELECT [Cuttime] As Pos1, [Weldtime] As Pos2, [Rivettime] As Pos3, Bend As Pos4
FROM JobOrder
You report would then refer to Pos1, not CutTime. The labels could also be textboxes, so they update automatically as well, for example:
SELECT [Cuttime] As Pos1, "Cut" As lbl1, [Weldtime] As Pos2, "Weld" As lbl2
[Rivettime] As Pos3, "Rivet" As lbl3, Bend As Pos4 "Bend" As lbl4
FROM JobOrder
It is possible that you could simplify further by normalizing your tables.
Tasks table
Job Action Time Machine SortOrder
1 Cut 10 AB 3
1 Bend 4 CD 1
1 Rivet 30 EF 6
So, what I've done is use a series of Switch functions in my query so that the data that is pulled into each query is inserted into each field by a logical statement. For operation name, the logic is as follows:
OP2: Switch([ST2]="PE01","Insert",[ST2]="PE02","Insert",[ST2]="BR01","Bend",[ST2]="BR02","Bend",[ST2]="WE01","Auto Weld",[ST2]="WE02","MIG Weld",[ST2]="WE03","TIG Weld",True,"N/A")
Which essentially means, If ST2=PE01, Then OP2=Insert, elseif ST2=BR01, then OP2=Bend...
Then I set up another swith that says If OP2=Bend, Time2=BendTime... So on and so forth. This way each field contains a value that is entered based on the logical statements and the order of the jobs is determined by the order that I've set when I enterred the station names in the Job Order Table.
i have a deployment to do within 2 days time and for the last three days i have been busy trying to understand this one thing am stuck in. It probably might be very silly of me but please take me as a newbie.
I am using an opensource software php opensource pos and it is made on CI. Now the issue is that the reports in the application are different than what my client wants. I want to change that to the way they want it but i cant.
this is the code:
$this->db->select('sale_date, sum(total) as total, sum(profit) as profit');
$this->db->from('sales_items_temp');
if ($inputs['sale_type'] == 'sales')
{
$this->db->where('quantity_purchased > 0');
}
elseif ($inputs['sale_type'] == 'returns')
{
$this->db->where('quantity_purchased < 0');
}
$this->db->group_by('sale_date');
$this->db->having('sale_date BETWEEN "'. $inputs['start_date']. '" and "'. $inputs['end_date'].'"');
$this->db->order_by('sale_date');
return $this->db->get()->result_array();
every thing is working fine and as expected. Now i need to make some changes but the issue is i cannot find the temp database to see which fields it has. This database table (the temp one) is being used in all the reports functions, same database.
Can some one be so helpful and explain me the way it works, or how is that i can make a change to it!?
The scenario is that it is giving a summary of all the sales in the selected date range as total. I want a break down in terms of cash, credit, credit card, debit card etc.
I have another report which shows that, but not in date wise as in not saying how much in which day but in total of the date range. This one gives the total as in total sales in a day but not the break up of it as in what was what.
You can login here first:
https://demo.phppointofsale.com/index.php/login (id and password is saved on the page)
Then you can paste this link on the address bar and see the report.
https://demo.phppointofsale.com/index.php/reports/summary_sales/1969-12-31/2012-03-13/all/0
I need it to be a breakdown of the total and remove the tax, profit and subtotal columns and change that with the kind of payment as in cash | credit | cheque etc and then a total for that day.
PS: I am sorry for such a big writing but i am really stuck, please help me out. Thank you in advance.
The table name is sales_items_temp.
To see the actual database config (for database name, host, etc), look in either /system/application/config/database.php or /application/config/database.php depending on the version of Codeigniter.
To see about changing the query, check out http://codeigniter.com/user_guide/database/active_record.html.