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Round Robin implementaion through sql script [message #472236]

Thu, 19 August 2010 06:11

virmahi
Messages: 266
Registered: April 2008
Location: India

Senior Member

Hi,
I have to implement round robin algorothim in sql script for allocation of some items to another entity. Not really sure how to do that and if there would be locks while selecting the one which is already being updated and so...!

Please give me some hint as how to go about it when the number of users involved would be very high to whom the items would be allocated in round robin function.

Regards,
Mahi

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Re: Round Robin implementaion through sql script [message #472241 is a reply to message #472236]

Thu, 19 August 2010 06:32

Michel Cadot
Messages: 68757
Registered: March 2007
Location: Saint-Maur, France, https...

Senior Member
Account Moderator

Not sure what you mean.
Explain in DETAILS what you have and what you want.

SQL works on data inside tables, so Post a working Test case: create table and insert statements along with the result you want with these data then we will be able work with your table and data.

Also always post your Oracle version, with 4 decimals.

Regards
Michel

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Re: Round Robin implementaion through sql script [message #472253 is a reply to message #472236]

Thu, 19 August 2010 07:30

Alessandro Rossi
Messages: 166
Registered: September 2008
Location: Rome

Senior Member

Use a database to implement a round robin resource scheduling, may generally be considered as one of the silliest things a man can conceive.

A Round Robin scheduler will heavily suffer of the crap I/O performances of a RDBMS (if compared with a segment of shared memory).

It would be better to explain your problem and needs. Before implementing it.

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Re: Round Robin implementaion through sql script [message #472304 is a reply to message #472236]

Thu, 19 August 2010 15:14

Alien
Messages: 292
Registered: June 1999

Senior Member

Hi,

if I understand the requirements correctly, you might want to look up the 'mod' function.

Regards,

Arian

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Re: Round Robin implementaion through sql script [message #472312 is a reply to message #472236]

Thu, 19 August 2010 16:49

Solomon Yakobson
Messages: 3305
Registered: January 2010
Location: Connecticut, USA

Senior Member

virmahi wrote on Thu, 19 August 2010 07:11

Hi,
I have to implement round robin algorothim in sql script for allocation of some items to another entity.

Are you talking about distributing some quantity as even as possible? If so:

variable amount_to_distribute number
exec :amount_to_distribute := 10;
select  deptno,
        trunc(:amount_to_distribute / count(deptno) over()) +
        case
          when mod(:amount_to_distribute,count(deptno) over()) >= row_number() over(order by deptno) then 1
          else 0
        end amount
  from  dept
  order by deptno
/ 
 
                   DEPTNO                    AMOUNT
------------------------- -------------------------
                       10                         3
                       20                         3
                       30                         2
                       40                         2
 
SQL> exec :amount_to_distribute := 19;
 
PL/SQL procedure successfully completed.
 
SQL> / 
 
                   DEPTNO                    AMOUNT
------------------------- -------------------------
                       10                         5
                       20                         5
                       30                         5
                       40                         4
 
SQL>

SY.

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Re: Round Robin implementaion through sql script [message #472604 is a reply to message #472312]

Mon, 23 August 2010 00:07

virmahi
Messages: 266
Registered: April 2008
Location: India

Senior Member

I am sorry, I couldn't explain it. Please see the table scripts

Create table lead(Lead_id number, allocated_fsc varchar2(12),is_free char);
Create table fsc(fsc_id varchar2(12), allocated_lead number, active char default 1);

insert into lead values(1,'',1);
insert into lead values(2,'',1);
insert into lead values(3,'',1);
insert into lead values(4,'',1);
insert into lead values(5,'',1);
insert into lead values(6,'',1);
insert into lead values(7,'',1);
insert into lead values(8,'',1);
insert into lead values(9,'',1);
insert into lead values(10,'',1);

insert into fsc values('FSC1',null,1);
insert into fsc values('FSC2',null,1);
insert into fsc values('FSC3',null,1);
insert into fsc values('FSC4',null,1);

LEAD_ID        FSC
----------   --------
1              FSC1
2              FSC2
3              FSC3
4              FSC4
5
6
7
8
9
10

The logic is that there should be equal distribution of Lead_ID among the FSCs using round robin algorithm.

There can be simultaneous LEADs coming in the system (web application with multiple sessions) to be allocated to FSCs.
When there is only one request ..for eg one LEAD comes in with LEAD_ID 1, then it would be assigned to the FSC1 and the 'FSC1' would be updated with the LEAD_ID value.
There would be an update statement for assignment of LEAD to FSC and when the next LEAD LEAD_ID 2 comes it would be assigned to the FSC2 in round robin function.

But when multiple LEADS come in system though various sessions and in that case assignment of FSCs to LEAD_IDs in round robin is a challenge.
For eg, when Lead_ID 1,2,3,4 comes together in one go, then FSC1 would be assigned to them all, but only one of them would get updated.
And once updated it would be commited too. And then the FSC2 should be updated with the one in queue.

Not sure how to handle the assignment of FSC when there is simultaneous requests for FSC by multiple LEAD_ID at the same time. There may be case when LEAD_ID 1,2,3,4 all request and FSC1 is set for the assignment in different sessions logged in by LEAD_IDs.

How to handle the circumstance so that the FSCs are allocated in fair order to LEAD_IDs with no blocking.

When there is an update done for one LEAD by one FSC and before the commit is done, the other session might be doing the same thing.

Please suggest as how to handle such situation.

[Updated on: Mon, 23 August 2010 02:26]

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Re: Round Robin implementaion through sql script [message #472660 is a reply to message #472604]

Mon, 23 August 2010 03:14

virmahi
Messages: 266
Registered: April 2008
Location: India

Senior Member

Please look into the given scenario and suggest me something. I am stuck as how to handle the multiple session updations using round robin.

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Re: Round Robin implementaion through sql script [message #472735 is a reply to message #472660]

Mon, 23 August 2010 09:26

Alessandro Rossi
Messages: 166
Registered: September 2008
Location: Rome

Senior Member

You've been quite parsimonious with that description!

And by the different definitions of Round Robin around the net, your request doesn't match with any of them. Not even the Round Robing Scheduling (that I mentioned before) could be next to it because it is based on suspension and resumption of a process witch shouldn't be compatible with your environment probably.

I suppose you're probably facing with a resource contention problem where you have a limited pool of resources to be allocated to the incoming requests, but it's just a supposition I had after interpreting the steps you described to solve your problem(in a probably wrong way!).

If so I advice you to leave the idea to implement a solution using SQL or a Database Server (it's not built for that).

And, also if I supposed a wrong case, describe better what you should effectively do because it's not very clear.

Don't pretend that others, also if better skilled than you, could be able to solve your problem without knowing it!

[Updated on: Mon, 23 August 2010 09:27]

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Re: Round Robin implementaion through sql script [message #472750 is a reply to message #472660]

Mon, 23 August 2010 12:41

LKBrwn_DBA
Messages: 487
Registered: July 2003
Location: WPB, FL

Senior Member

virmahi wrote on Mon, 23 August 2010 04:14

Please look into the given scenario and suggest me something. I am stuck as how to handle the multiple session updations using round robin.

The scenario you are describing looks more like a "queuing" issue than "round robin" resource allocation.

1) Leads arrive ....
2) You assign to "next available" fsc
3) In no fsc is available, the lead remains in the queue.
4) When fsc "commits" lead, it becomes available.

[Updated on: Mon, 23 August 2010 12:52] by Moderator

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Re: Round Robin implementaion through sql script [message #472796 is a reply to message #472750]

Mon, 23 August 2010 23:47

virmahi
Messages: 266
Registered: April 2008
Location: India

Senior Member

The scenario you are describing looks more like a "queuing" issue than "round robin" resource allocation.

May be I am not clear...but the main perpose of the logic is to maintain a fair distribution of LEADS among FSCs.

LEADs are opportunities generated by telesales or when some one visits a branch of insurance company. So the generated leads are sent to the system via webservices. They can be many in number at a time.
The FSCs are officers who process the LEADS. If there are 4 FSCs then they all should get LEADs in a fair way equally so Round Robin algorithm is required.

Had the number of LEADs coming been only 1 then it would have been assigned to FSC1 and if after sometime another LEAD comes t would get assigned to FSC2. But there will be simultaneous LEADs coming in system to request a FSC and to get updated/mapped to a FSC. So a case can be that LEAD1, LEAD2, LEAD3 will try to update with FSC1 at the same time.

One Lead would be assigned to FSC1, next LEAD to FSC2, FSC3, FSC4, and then to FSC1, FSC2....! while all LEADS who came in system at one point of time would be trying to mapp with the FSC1.

[Updated on: Mon, 23 August 2010 23:49]

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Re: Round Robin implementaion through sql script [message #472853 is a reply to message #472796]

Tue, 24 August 2010 05:35

Alessandro Rossi
Messages: 166
Registered: September 2008
Location: Rome

Senior Member

As I told you before, you shouldn't use the database to manage this purpose, it's not built for that and it doesn't have any implementation for the needed structures to manage that flow.

You should use the Application Server to accomplish this task instead. You just need to define a queue shared in mutex among the worker processes that pull a request when they finish the elaboration of a process and the requests manager that pushes the incoming requests in the queue.

That is not my main field, so I can't help you too much on it, but you should be able to define such a scenario quite easily with a few simple steps.

Bye Alessandro

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Re: Round Robin implementaion through sql script [message #472953 is a reply to message #472853]

Tue, 24 August 2010 23:17

monasingh
Messages: 229
Registered: May 2006
Location: Mumbai

Senior Member

To:Alessandro Rossi
Can't this can be done in a database? The Leads needs to be mapped with the FSCs whose turn comes up as per Round Robin.

Are you sure Round Robin is not possible in oracle database using any script?

[Updated on: Tue, 24 August 2010 23:26]

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Re: Round Robin implementaion through sql script [message #472955 is a reply to message #472660]

Tue, 24 August 2010 23:43

BlackSwan
Messages: 26766
Registered: January 2009
Location: SoCal

Senior Member

>Please look into the given scenario and suggest me something. I am stuck as how to handle the multiple session updations using round robin.

Stop fixating on "round robin" (RR).
RR is just 1 implementation choice for distributing workload.

View the problem as a single queue with multiple servers.
>.but the main perpose of the logic is to maintain a fair distribution of LEADS among FSCs
Each LEAD is a record in the LEADS table.
Write a function that allows any FCS to "pull" a record to it at which time the record is removed from LEADS table.

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Re: Round Robin implementaion through sql script [message #472971 is a reply to message #472953]

Wed, 25 August 2010 02:42

Alessandro Rossi
Messages: 166
Registered: September 2008
Location: Rome

Senior Member

monasingh wrote on Wed, 25 August 2010 06:17

To:Alessandro Rossi
The Leads needs to be mapped with the FSCs whose turn comes up as per Round Robin.

To do so the mutex on the Requests Queue of the solution I described before should be handled with a supplementary queue. In this way the FCS as soon as it finishes its job en-queues its self in that supplementary queue to pull its request whet it will be its turn.

monasingh wrote on Wed, 25 August 2010

Are you sure Round Robin is not possible in oracle database using any script?

The solution of this problem doesn't need a SQL database, but it needs a service with Queuing features.

Oracle database has the Streams and AQ feature anyway, witch is a component common to other Oracle products too. It's not a SQL feature, but a component of the Oracle products with PL/SQL, Java and other interfaces, to implement a queueing service.

Anyway the reasons why I said that a database is not built for this purpose are that:
- There is no need to store volatile structures into physical memory and a database can just use it, there are some memory structures too on Oracle, but they're very limited.
- There are no structures that could optimally implement a queue in a database.

Bye Alessandro

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Re: Round Robin implementaion through sql script [message #472988 is a reply to message #472971]

Wed, 25 August 2010 03:51

virmahi
Messages: 266
Registered: April 2008
Location: India

Senior Member

I am into pl/sql scripting only...thought will do something writting a procedure...might use...order by in some way..to get the top one in the queue using sequence or something..... not sure about Queuing features. Totally blank...no idea what to do now Sad

Sad

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Re: Round Robin implementaion through sql script [message #473034 is a reply to message #472988]

Wed, 25 August 2010 09:18

Alessandro Rossi
Messages: 166
Registered: September 2008
Location: Rome

Senior Member

If you don't say anything about the exact environment you're trying to configure (Application Server in use, kind of web services and everything about it), it would be really hard to try helping you.

If I would have to develop something for it I opt to for a java solution like this

import java.util.*;
import java.util.concurrent.*;


public class TestRR {
	private static LinkedBlockingQueue<LEADRequest> requests;
	private static LinkedBlockingQueue<FSCSServer> processes;
	public static int FSCSs = 4; 
	public static synchronized void print(String m) {
		System.out.println(Calendar.getInstance().getTime()+":"+m);
	}
	public static class LEADRequest {
		int elapsedTime;
		private static int lastid = 0;
		public int id=lastid++;
		
		
		public LEADRequest(int time) {
			print("generating LEAD"+id);
			elapsedTime = time;
		}
		public void setElapsedTime(int t) {
			elapsedTime = t;
		}
		public int getElapsedTime() {
			return elapsedTime;
		}
		public int getId() {
			return id;
		}
	}
	public static class FSCSServer extends Thread{
		public void print(String s) {
			TestRR.print(String.format("FSCS_%d :%s",id,s));
		}
		private static int lastid = 0;
		public int id=lastid++;
		LEADRequest currRequest;
		public void elaborate() throws InterruptedException {
			print(String.format("to process LEAD_%d",currRequest.getId()));
			if (currRequest.getElapsedTime() > 0 ) {
				sleep(currRequest.getElapsedTime());
			}
			else {
				processing = false;
			}
			print(String.format("processed LEAD_%d",currRequest.getId()));
		}
		private boolean processing = true;
		public void run() {
			print("Started");
			synchronized (this) {
				try {
					while (processing) {
						wait();
						currRequest = requests.take();
						elaborate();
						processes.put(this);
							
					}
				} catch (InterruptedException e) {
					e.printStackTrace();
				}
			}
			print("Halted");
		}
	}
	public static void main(String[] args) throws InterruptedException {
		
		processes = new LinkedBlockingQueue<FSCSServer>();
		requests = new LinkedBlockingQueue<LEADRequest>();
		int reqTimes[] = {
				10,5,2,4,9,20,3,7,8,1,6,8,2,0,0,0,0,0,0,0
			};
		int pauses[] = {
				0,1,0,0,0,9,0,0,0,0,0,20
			};
		for (int i = 0; i < 4; i++) {
			FSCSServer  s = new FSCSServer();
			s.start();
			processes.put(s);
		}
		print("Start");
		for (int i = 0; i < reqTimes.length; i++) {
			requests.put(new LEADRequest(reqTimes[i]*100));
			FSCSServer  s = processes.take();
			synchronized (s) {
				s.notify();
			}
			if (i < pauses.length) {
				Thread.sleep(pauses[i]*100);
			}
		}
		print("Stop");
	}
	
}

In this sample I'm en-queuing a succession of requests (like your LEADS) that should have an elapsed time of the corresponding value on the array reqTimes ( in tenth of seconds ) and that should have a pause between the generation of a request and the following one of the corresponding value in the array pauses ( in tenth of seconds ).

The duration of the requests here is
10,5,2,4,9,20,3,7,8,1,6,8,2,0,0,0,0,0,0,0
where 0 indicates a request that kills the process that elaborates it.

And time between one request generation and the following is
0,1,0,0,0,9,0,0,0,0,0,20
where 0 indicates that the following request will be generated at the same time of it.

This is the spool of that execution:

Wed Aug 25 16:01:24 CEST 2010:Start
Wed Aug 25 16:01:24 CEST 2010:FSCS_0 :Started
Wed Aug 25 16:01:24 CEST 2010:FSCS_1 :Started
Wed Aug 25 16:01:24 CEST 2010:FSCS_3 :Started
Wed Aug 25 16:01:24 CEST 2010:FSCS_2 :Started
Wed Aug 25 16:01:24 CEST 2010:generating LEAD0
Wed Aug 25 16:01:24 CEST 2010:generating LEAD1
Wed Aug 25 16:01:24 CEST 2010:FSCS_0 :to process LEAD_0
Wed Aug 25 16:01:24 CEST 2010:FSCS_1 :to process LEAD_1
Wed Aug 25 16:01:24 CEST 2010:generating LEAD2
Wed Aug 25 16:01:24 CEST 2010:FSCS_2 :to process LEAD_2
Wed Aug 25 16:01:24 CEST 2010:generating LEAD3
Wed Aug 25 16:01:24 CEST 2010:FSCS_3 :to process LEAD_3
Wed Aug 25 16:01:24 CEST 2010:generating LEAD4
Wed Aug 25 16:01:24 CEST 2010:FSCS_2 :processed LEAD_2
Wed Aug 25 16:01:24 CEST 2010:generating LEAD5
Wed Aug 25 16:01:24 CEST 2010:FSCS_2 :to process LEAD_4
Wed Aug 25 16:01:25 CEST 2010:FSCS_1 :processed LEAD_1
Wed Aug 25 16:01:25 CEST 2010:FSCS_1 :to process LEAD_5
Wed Aug 25 16:01:25 CEST 2010:FSCS_3 :processed LEAD_3
Wed Aug 25 16:01:25 CEST 2010:FSCS_0 :processed LEAD_0
Wed Aug 25 16:01:25 CEST 2010:FSCS_2 :processed LEAD_4
Wed Aug 25 16:01:25 CEST 2010:generating LEAD6
Wed Aug 25 16:01:25 CEST 2010:generating LEAD7
Wed Aug 25 16:01:25 CEST 2010:FSCS_3 :to process LEAD_6
Wed Aug 25 16:01:25 CEST 2010:generating LEAD8
Wed Aug 25 16:01:25 CEST 2010:FSCS_0 :to process LEAD_7
Wed Aug 25 16:01:25 CEST 2010:generating LEAD9
Wed Aug 25 16:01:25 CEST 2010:FSCS_2 :to process LEAD_8
Wed Aug 25 16:01:26 CEST 2010:FSCS_3 :processed LEAD_6
Wed Aug 25 16:01:26 CEST 2010:generating LEAD10
Wed Aug 25 16:01:26 CEST 2010:FSCS_3 :to process LEAD_9
Wed Aug 25 16:01:26 CEST 2010:FSCS_3 :processed LEAD_9
Wed Aug 25 16:01:26 CEST 2010:generating LEAD11
Wed Aug 25 16:01:26 CEST 2010:FSCS_3 :to process LEAD_10
Wed Aug 25 16:01:26 CEST 2010:FSCS_0 :processed LEAD_7
Wed Aug 25 16:01:26 CEST 2010:FSCS_0 :to process LEAD_11
Wed Aug 25 16:01:26 CEST 2010:FSCS_2 :processed LEAD_8
Wed Aug 25 16:01:26 CEST 2010:FSCS_3 :processed LEAD_10
Wed Aug 25 16:01:27 CEST 2010:FSCS_1 :processed LEAD_5
Wed Aug 25 16:01:27 CEST 2010:FSCS_0 :processed LEAD_11
Wed Aug 25 16:01:28 CEST 2010:generating LEAD12
Wed Aug 25 16:01:28 CEST 2010:generating LEAD13
Wed Aug 25 16:01:28 CEST 2010:generating LEAD14
Wed Aug 25 16:01:28 CEST 2010:generating LEAD15
Wed Aug 25 16:01:28 CEST 2010:FSCS_2 :to process LEAD_12
Wed Aug 25 16:01:28 CEST 2010:generating LEAD16
Wed Aug 25 16:01:28 CEST 2010:FSCS_0 :to process LEAD_13
Wed Aug 25 16:01:28 CEST 2010:FSCS_1 :to process LEAD_14
Wed Aug 25 16:01:28 CEST 2010:FSCS_0 :processed LEAD_13
Wed Aug 25 16:01:28 CEST 2010:FSCS_1 :processed LEAD_14
Wed Aug 25 16:01:28 CEST 2010:FSCS_0 :Halted
Wed Aug 25 16:01:28 CEST 2010:FSCS_3 :to process LEAD_15
Wed Aug 25 16:01:28 CEST 2010:generating LEAD17
Wed Aug 25 16:01:28 CEST 2010:generating LEAD18
Wed Aug 25 16:01:28 CEST 2010:FSCS_3 :processed LEAD_15
Wed Aug 25 16:01:28 CEST 2010:FSCS_1 :Halted
Wed Aug 25 16:01:28 CEST 2010:FSCS_3 :Halted
Wed Aug 25 16:01:28 CEST 2010:generating LEAD19
Wed Aug 25 16:01:28 CEST 2010:FSCS_2 :processed LEAD_12
Wed Aug 25 16:01:28 CEST 2010:Stop
Wed Aug 25 16:01:28 CEST 2010:FSCS_2 :to process LEAD_16
Wed Aug 25 16:01:28 CEST 2010:FSCS_2 :processed LEAD_16
Wed Aug 25 16:01:28 CEST 2010:FSCS_2 :Halted

Bye Alessandro

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Re: Round Robin implementaion through sql script [message #637500 is a reply to message #473034]

Tue, 19 May 2015 02:13

raj.rksia
Messages: 3
Registered: May 2015
Location: INDIA

Junior Member

Hi All,
I hope the below proc will fulfil the requirement.
/*********Round Robin logic - Start *******************************/

CREATE OR REPLACE PROCEDURE PORTALINDIVIDUAL.proc_raj_temp
IS

cursor cur_get_lead is
select * from lead;

cursor cur_get_fsc(p_cnt number) is
select * from (select rownum rnum,fsc_id from fsc) where rnum=p_cnt ;

cursor cur_fsc_cnt is
select count(fsc_id) cnt from fsc;

v_cnt number :=1;
v_cur_get_fsc cur_get_fsc%rowtype;
v_cur_fsc_cnt cur_fsc_cnt%rowtype;

begin

for rec in cur_get_lead loop
EXIT WHEN cur_get_lead%NOTFOUND;
open cur_get_fsc(v_cnt);
fetch cur_get_fsc into v_cur_get_fsc;
close cur_get_fsc;
update lead set allocated_fsc=v_cur_get_fsc.fsc_id,is_free='1' where lead_id=rec.lead_id;

v_cnt :=v_cnt+1;
open cur_fsc_cnt;
fetch cur_fsc_cnt into v_cur_fsc_cnt;
close cur_fsc_cnt;
if (v_cnt=v_cur_fsc_cnt.cnt+1) then
v_cnt:=1;
end if;
commit;
end loop;

end proc_raj_temp;
/*********Round Robin logic - End *******************************/

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Re: Round Robin implementaion through sql script [message #637502 is a reply to message #637500]

Tue, 19 May 2015 02:21

Michel Cadot
Messages: 68757
Registered: March 2007
Location: Saint-Maur, France, https...

Senior Member
Account Moderator

Welcome to the forum.
Please read OraFAQ Forum Guide and How to use [code] tags and make your code easier to read.

I don't know if your code fulfills the requirement but I doubt OP is in any way still interested to it after 5 years.

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Re: Round Robin implementaion through sql script [message #637504 is a reply to message #637502]

Tue, 19 May 2015 03:30

raj.rksia
Messages: 3
Registered: May 2015
Location: INDIA

Junior Member

Thanks Michel. I was searching for alike logic and I found this thread interesting. Tried with above logic and its working.

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Re: Round Robin implementaion through sql script [message #637505 is a reply to message #637504]

Tue, 19 May 2015 03:36

raj.rksia
Messages: 3
Registered: May 2015
Location: INDIA

Junior Member

Yes Michel, I have been through the links and will follow.

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Re: Round Robin implementaion through sql script [message #637525 is a reply to message #472988]

Tue, 19 May 2015 10:48

EdStevens
Messages: 1376
Registered: September 2013

Senior Member

virmahi wrote on Wed, 25 August 2010 03:51

I am into pl/sql scripting only...thought will do something writting a procedure...might use...order by in some way..to get the top one in the queue using sequence or something..... not sure about Queuing features. Totally blank...no idea what to do now

Pardon me for jumping in here, but after reading this entire thread (to date) then the comment above, it sounds like a classic case of "if the only tool you have is a hammer, every problem looks like a nail."

What everyone is trying to tell you is that the database -- any database -- isn't the place to implement what you want to do. That's not what databases are for. Step back from your pre-conceived notions of "round robin" (you really do seem fixated on that term, as if it has some standard meaning in our world) or any other technique, and think about the BUSINESS problem you need to solve.

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Re: Round Robin implementaion through sql script [message #637537 is a reply to message #637502]

Tue, 19 May 2015 16:53

EdStevens
Messages: 1376
Registered: September 2013

Senior Member

Michel Cadot wrote on Tue, 19 May 2015 02:21

I don't know if your code fulfills the requirement but I doubt OP is in any way still interested to it after 5 years.

Ouch!
That's twice in the last few day's I've bit on an old thread that came to the top of the list when someone else revived it.

Whenever that happens, I always wonder what the 'reviving' person was doing to have even found the thread in the first place.

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Re: Round Robin implementaion through sql script [message #637555 is a reply to message #637537]

Wed, 20 May 2015 02:51

cookiemonster
Messages: 13966
Registered: September 2008
Location: Rainy Manchester

Senior Member

They used google*

* other search engines are available

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