SQL SERVER - Ranking Half-Hour Values

Hi!
I'am trying to ranking some table with the following code:
SELECT *
FROM (SELECT distinct 1 as [KPI],
a.Machine_N as [RDP],
Min(a.Date) as [RDP Date],
DATEPART(HOUR,A.Date) AS [RDP TIME],
b.Machine_Name as [RDS],
Min(b.Data) as [RDS Date],
DATEPART(HOUR,b.Data) as [Time],
RANK() OVER
( PARTITION BY a.Date order by b.Data ) as [Rank]
FROM [dbo].[KP1_RDP_SA] a
INNER JOIN [dbo].[KPI1_RDS_SA] b
ON a.Machine_N = b.Machine_Name and DATEPART(hour,a.Date) = DATEPART(hour,b.Data) and CONVERT(Date, a.Date) = Convert(DATE, b.Data)
WHERE DATEPART(hour,b.Data) = DATEPART(hour,a.Date) and LEN(a.[Notes]) = 0 and DATEPART(hour,a.Date) > 7 and DATEPART(hour,a.Date) < 20
GROUP BY a.Date,
b.Data,
a.Machine_N,
b.Machine_Name,b.Data, a.Date
HAVING b.Data > a.Date) tab1
WHERE tab1.Rank = 1
My goal is ranking this value not using DatePart(Hour, Value) but using Half-Hour values, something like that:
RANK() OVER
( PARTITION BY (DATEPART(hour\2, a.Date)) order by b.Data ) as [Rank]

Thanks for your response.
Here a sample output of my data:
KPI
RDP
RDP Date
Time
RDS
RDS Date
Rank 1
1
PPLRDS01
2015-04-12 08:00:03.000
16
PPLRDS01
2015-04-12 08:00:14.000
1
1
PPLRDS01
2015-04-12 08:30:03.000
17
PPLRDS01
2015-04-12 08:30:13.000
1
1
PPLRDS01
2015-04-12 09:00:03.000
18
PPLRDS01
2015-04-12 09:00:13.000
1
1
PPLRDS01
2015-04-12 09:30:03.000
19
PPLRDS01
2015-04-12 09:30:12.000
1
1
PPLRDS01
2015-04-12 10:00:03.000
20
PPLRDS01
2015-04-12 10:00:15.000
1
1
PPLRDS01
2015-04-12 10:30:03.000
21
PPLRDS01
2015-04-12 10:30:10.000
1
I Have multiples PPLRDS01 in the same space time, and my goal is to ensure that the I only record the first RDP Date at the certain hours and the first half-hour. For example, Imagine that the monitorization registe the following data:
KPI RDP
RDP DATE TIME
RDS DATE
1 PPLRDS01
2015-04-12 08:01:02
8 2015-04-12 08:01:07
1 PPLRDS01 2015-04-12 08:02:02
8 2015-04-12 08:09:07
1 PPLRDS01
2015-04-12 08:03:04 8
2015-04-12 08:15:02
1 PPLRDS01
2015-04-12 08:30:02
8 2015-04-12 08:31:07
1 PPLRDS01 2015-04-12 08:32:02
8 2015-04-12 08:39:07
1 PPLRDS01
2015-04-12 08:33:04 8
2015-04-12 08:35:02
I only want to save the first half recording data in a half minutes. That's why I create the Rank. To save the first data in a Hour I already do it

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i have created a similar DB in SQL SERVER, however i am not able to create a user, similar to musicdbuser and musicdbpass in SQL SERVER.
Also in the Administrator console i followed these steps.
1. Applications->web Applications->deployed the war file-> OK
2.Resources->JDBC->Connection Pool->New->Name ='musicdb-jdbc-pool-SQLserver'->Resource Type='javax.sql.Datasource'->Database Vendor='Microsoft SQL SERVER'-> Next
added properties Values
databaseName musicdb(this is the database i created in MS SQL SERVER)
databaseSourceName musicdb(this is the DSN name i created in control panel->ODBC connections)
networkProtocol TCP
user sa (this is the username that i use to start SQL SERVER)
password syntel123$ (this is the password that i use with the above user )
portNumber 1443
serverName localhost
then i click finish.
if i say ping to this connection , i get success!!
3. then i goto resources->jdbc->jdbc resources->new->JNDI Name="jdbc/musicdb"->pool name="musicdb-jdbc-pool-SQLserver'"->ok
4. Then i click resources->connectors->connector connection pool->new->Name="mep/musicdb"->resource adapter="ds-jcr-connector-jaxrs"->next->finish
5 Then i click resources->connector resources->new->JNDI name="mep/musicdb"->pool="mep/musicdb"->ok
however when i hit the URL http://localhost:8080/musicdb/resources/albums
i get the following error
type : Exception report
message
description: The server encountered an internal error () that prevented it from fulfilling this request.
exception: javax.servlet.ServletException: com.sun.jersey.api.container.ContainerException: java.lang.NoClassDefFoundError: Could not initialize class com.sun.mep.ws.vtms.util.ConnectionPool
root cause: com.sun.jersey.api.container.ContainerException: java.lang.NoClassDefFoundError: Could not initialize class com.sun.mep.ws.vtms.util.ConnectionPool
root cause: java.lang.NoClassDefFoundError: Could not initialize class com.sun.mep.ws.vtms.util.ConnectionPool

Hi,
I was able to create a JDBC connection pool for SQL Server successfully and will share the key steps, and was able to create a MEP user with an ECBO connection configured for the SQL Server; However, it looks like there is a "false positive" problem. Even though the user was created with the SQL Server connector whose associated JDBC connection pool passed the Ping test, doing a sync as that user changed the MySQL database album table and not the SQL Sever album table. MEP didn't give any error at all. I will bring this up with our engineers.
Here are the steps for at least getting GF JDBC connections with SQL Server working.
1. With MS SQL Sever 2005 Server Management Studio,
created a 'musicdb' database, a 'musicdbuser' user with password 'musicdbpass',
and added the 'album' table with
name (varchar(30) primary key, not null)
artist (varchar(30), not null)
date_published (datetime, not null)
rating (int, not null)
username (varchar(30), not null)
2. With MS SQLServer Configuration Manager, enable TCP/IP on static IP address
and 127.0.0.1 on port 1433 and restarted the SQL Server service
3. Downloaded Microsoft's 2.0 Driver for SQL Server 2005
4. Copied the driver sqljdbc4.jar to GF_HOME/domains/mep/lib/ext
5. Restarted GF
6. Login to GF Admin Console
7. Create Resources -> JDBC -> Connection Pool
name: musicdb_pool_sqlserver
resource type: javax.sql.DataSource
datasource class: com.microsoft.sqlserver.jdbc.SQLServerDataSource
8. Create Resources -> JDBC -> Resource
name jdbc/musicdb_sqlserver
9. Go back to musicdb_pool_sqlserver and click Additional Properties then add
user: musicdbuser
password: musicdbpass
serverName=localhost
portNumber=1433
databaseName=musicdb
10. Click General tab and click Ping. Get Success!

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