ROWNUM In Oracle

Is there any way to implement ROWNUM in Oracle to select row no.
Is there any way to select the row no when retrieving records as
1 Tv
2 Fridge
3 RadioHi,
There is no concept of Rownum in sql server.
But you could write ur own query to get the serial number.
Use the below script as sample:-
create table item(item_code varchar(05))
go
insert into item values('a1')
insert into item values('a2')
insert into item values('a3')
insert into item values('a4')
go
SELECT (SELECT COUNT(i.item_code)
FROM item i
WHERE i.item_code >= o.item_code ) AS RowID,
item_code
FROM item o
ORDER BY RowID
Thanks
Hari
SQL Server MVP
"Renjith" <Renjith@.discussions.microsoft.com> wrote in message
news:3BDAC82C-4AB5-4631-ABAE-AB693B0E1312@.microsoft.com...
> Is there any way to implement ROWNUM in Oracle to select row no.
> Is there any way to select the row no when retrieving records as
> 1 Tv
> 2 Fridge
> 3 Radio|||Hi
There is not a ROWNUM function in SQLServer 2000 using an identity column is
usually the alternative. If you want to rank your values then you could use
a
construct like:
e.g
SELECT ( SELECT COUNT(*) FROM MyTable T WHERE t.id <= M.id ) AS Rank,
col1, col2
FROM MyTable M
These links may also help.
http://vyaskn.tripod.com/ oracle_sq...ent
s.htm
http://www.microsoft.com/resources/...r />
0761.mspx
http://www.microsoft.com/sql/evalua...pare/oracle.asp
John
"Renjith" wrote:

> Is there any way to implement ROWNUM in Oracle to select row no.
> Is there any way to select the row no when retrieving records as
> 1 Tv
> 2 Fridge
> 3 Radio|||Hi
If it is a big table then the count(*) as inner query will create
performance problem '
"John Bell" wrote:
> Hi
> There is not a ROWNUM function in SQLServer 2000 using an identity column
is
> usually the alternative. If you want to rank your values then you could us
e a
> construct like:
> e.g
> SELECT ( SELECT COUNT(*) FROM MyTable T WHERE t.id <= M.id ) AS Rank,
> col1, col2
> FROM MyTable M
> These links may also help.
> http://vyaskn.tripod.com/ oracle_sq...ent
s.htm
> http://www.microsoft.com/resources/.../>
/c0761.mspx
> http://www.microsoft.com/sql/evalua...pare/oracle.asp
> John
> "Renjith" wrote:
>|||Hi
It may, and indexing would reduce the problem.
You can also do something like:
CREATE TABLE MyTest ( id int not null identity(1,1), val char(1))
INSERT INTO MyTest ( val )
SELECT 'A'
UNION ALL SELECT 'B'
UNION ALL SELECT 'C'
UNION ALL SELECT 'D'
UNION ALL SELECT 'E'
DELETE FROM MyTest where val = 'C'
SELECT m.id, COUNT(*) as Rank, m.val
FROM MyTest m
JOIN MyTest r ON R.id <= M.id
GROUP BY m.id, M.val
ORDER BY 2
Another alternative would be do deligate the numbering to the client.
John
"Renjith" wrote:
> Hi
> If it is a big table then the count(*) as inner query will create
> performance problem '
> "John Bell" wrote:
>|||Hi
You may want to look at Itzik Ben-Gan's articles in the May 2005 SQL
Server Magazine.
http://www.windowsitpro.com/Article...5828/45828.html
http://www.windowsitpro.com/Article...2302/42302.html
http://www.windowsitpro.com/Article...2646/42646.html
John

RowCount

Hi,

want to get the number of rows i'm retrieving from a source. This count should be written as " No: of roes retrieved" + varname

I have used OleDbSource, RowCount,Script [ To write in a file ]. Rows is the package level variable name used in rowcount. when i do this way it always writes as 0 in the file.

[code in Script]

Dim sw As New StreamWriter("D:\Vijay1.txt")

s = Variables.Rows

sw.WriteLine(s.ToString)

sw.close

[/Code]

Can anyone help on this

you should store the row count in an ssis variable, then retreive the value from the script...|||

Hi,

I have done the same way. you can see in the code i have added. Rows is the package level variable I have used. In script I used Variables.Rows to access the value. when i write into a file it rights as 0

Thanks

|||

Can you try as follows:

Dim sw As New StreamWriter("D:\Vijay1.txt")

sw.WriteLine(Dts.Variables("Rows").Value.ToString())

sw.close()

Thanks,
Loonysan

|||

ManjuVijay wrote:

Hi,

I have done the same way. you can see in the code i have added. Rows is the package level variable I have used. In script I used Variables.Rows to access the value. when i write into a file it rights as 0

Thanks

the code should be:

s = Dts.Variables("Rows").Value

|||

Hi,

I am getting error saying DTS is not declared.

Thanks

|||

Hi,

I want to know whether i'm missing anyother thing.

I beleive I have to set only the variable name in RowCount. Any thing else I have to do?

|||

If i use script task it works properly

why i am not able to do so in script transform component

|||

The Script Task and Script Component are very different beasts. It is wrong to assume that because you can do something in one then you can also do the same in the other.

Its also true to say there are different ways of doing the same thing. For example, the syntax for accessing variables in the script component is different to that for accessig them in the script task.

What exactly are you unable to do?

-Jamie

|||> If i use script task it works properly

>why i am not able to do so in script transform component

The script component is used within a DataFlow task. The DataFlow task "snapshots" a variable value when it begins execution and cannot modify the variable until it has completed.

So, your row count = 0 at the beginning of execution. Your script component accesses the "snapshot" value and writes out 0.

The RowCount component only updates the row count variable, when execution of the data flow has completed. Your script task accesses the value after this and writes out the final rowcount.

Why does SSIS snapshot variable values? Well imagine a conditional split where the data is split on a variable value. If that could change during execution of a data flow, the behaviour of the split would be unpredictable - rows would be directed depending on whether they just happened to reach the split before or after the variable changed.

Donald

sql