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Querying Data From One Table Against Another Table For All Results


Querying Data From One Table Against Another Table For All Results

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michaelhamptonwork
michaelhamptonwork
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Hello,
I am new to the forums and overall new to SQL and SRSS. I have two 2008 SQL databases that I am trying to generate a report from two different data sets.

Essentially, I have one database that contains all of our supported buildings with their subnets:

Table - Building_Information

Building_Name Subnet
Building 1 192.168.1.%
Building 2 192.168.2.%
Building 3 192.168.3.%

And then in another database, I have a list of all of our devices:

Table - Device_Information

DeviceNum IP_Address
Device1 192.168.1.2
Device2 192.168.1.3
Device3 192.168.2.2
Device4 192.168.3.1
Device5 192.168.3.2
Device6 192.168.3.3

What I am trying to achieve is a report by Building of the total number of devices in each Building.

I have a Dataset for Building_Information:

SELECT *
FROM Building_Information

and a second Dataset for Device_Information:

SELECT count(IP_Address)
FROM Device_Information
WHERE (IP_Address LIKE (@Subnet))

matching the parameter of @Subnet on the queried values of the Subnet from the Building_Information query.

However, on the multiple value pass it gives an error because of the like statement (Incorrect syntax ","). When I try to substitute the LIKE for IN, it will only match the value if it is an exact match.

Any ideas would be great.

Thank you.
Igor Micev
Igor Micev
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Hi,

You must miss something simple. I don't know your exact code, however put attention on data types in tables of both databases.

select col1,col2,...,colN
from db1.shcema1.table1 tb1
join db2.schema2.table2 tb2 on convert(nvarchar(100), tb1.id) = convert(nvarchar(100),tb2.id)
where ... 'your conditions'

also check if the collations on both databases are same.
Smile

Igor Micev,
My blog: www.igormicev.com
rVadim
rVadim
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Please next time provide DDL and INSERTs like this:



CREATE TABLE #Building_Information (
Building_Name VARCHAR(50)
,Subnet VARCHAR(15)
);

INSERT INTO #Building_Information (Building_Name, Subnet)
VALUES ('Building 1', '192.168.1.%'),
('Building 2', '192.168.2.%'),
('Building 3', '192.168.3.%')

SELECT * FROM #Building_Information

CREATE TABLE #Device_Information (
DeviceNum VARCHAR(50)
,IP_Address VARCHAR(15)
);

INSERT INTO #Device_Information (DeviceNum, IP_Address)
VALUES ('Device1', '192.168.1.2'),
('Device2', '192.168.1.3'),
('Device3', '192.168.2.2'),
('Device4', '192.168.3.1'),
('Device5', '192.168.3.2'),
('Device6', '192.168.3.3')

SELECT * FROM #Device_Information




Now what do you mean by "multiple value pass"? What is the value of @Subnet when error occures?
Lynn Pettis
Lynn Pettis
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Do you mean something like this (based on test setup provided by rVadim):



CREATE TABLE #Building_Information (
Building_Name VARCHAR(50)
,Subnet VARCHAR(15)
);

INSERT INTO #Building_Information (Building_Name, Subnet)
VALUES ('Building 1', '192.168.1.%'),
('Building 2', '192.168.2.%'),
('Building 3', '192.168.3.%')

SELECT * FROM #Building_Information

CREATE TABLE #Device_Information (
DeviceNum VARCHAR(50)
,IP_Address VARCHAR(15)
);

INSERT INTO #Device_Information (DeviceNum, IP_Address)
VALUES ('Device1', '192.168.1.2'),
('Device2', '192.168.1.3'),
('Device3', '192.168.2.2'),
('Device4', '192.168.3.1'),
('Device5', '192.168.3.2'),
('Device6', '192.168.3.3')

SELECT * FROM #Device_Information;

SELECT
*
FROM
#Building_Information bi
INNER JOIN #Device_Information di
ON (di.IP_Address LIKE bi.Subnet);

SELECT
bi.Building_Name,
COUNT(di.DeviceNum) NumberOfDevices
FROM
#Building_Information bi
INNER JOIN #Device_Information di
ON (di.IP_Address LIKE bi.Subnet)
GROUP BY
Building_Name;

GO

DROP TABLE #Building_Information;
DROP TABLE #Device_Information;
GO




Cool
Lynn Pettis

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andersg98
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you will probably need to split the IP addresses to deal with the third octet reaching double digits. But with the data you supplied this works:


SELECT B.Building_Name, D.Device_cnt
FROM Building_Information AS B
LEFT JOIN (SELECT LEFT(IP_Address,9) AS Subnet, COUNT(DeviceNum) AS Device_cnt
FROM Device_Information
GROUP BY LEFT(IP_Address,9)) AS D
ON LEFT(B.Subnet,9) = D.Subnet



michaelhamptonwork
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Thank you all for your help. I think I will try going the route that Lynn suggested and possibly try to import the table from my second database into my first as to eliminate that issue.

Thank you all.
ChrisM@Work
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Here's an alternative using PARSENAME()

SELECT
bi.Building_Name,
COUNT(di.DeviceNum) NumberOfDevices
FROM #Building_Information bi
INNER JOIN #Device_Information di
ON PARSENAME(bi.Subnet,4) = PARSENAME(di.IP_Address,4)
AND PARSENAME(bi.Subnet,3) = PARSENAME(di.IP_Address,3)
AND PARSENAME(bi.Subnet,2) = PARSENAME(di.IP_Address,2)
GROUP BY Building_Name;



“Write the query the simplest way. If through testing it becomes clear that the performance is inadequate, consider alternative query forms.” - Gail Shaw

For fast, accurate and documented assistance in answering your questions, please read this article.
Understanding and using APPLY, (I) and (II) Paul White
Hidden RBAR: Triangular Joins / The "Numbers" or "Tally" Table: What it is and how it replaces a loop Jeff Moden
Exploring Recursive CTEs by Example Dwain Camps
Lynn Pettis
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ChrisM@Work (8/14/2012)
Here's an alternative using PARSENAME()

SELECT
bi.Building_Name,
COUNT(di.DeviceNum) NumberOfDevices
FROM #Building_Information bi
INNER JOIN #Device_Information di
ON PARSENAME(bi.Subnet,4) = PARSENAME(di.IP_Address,4)
AND PARSENAME(bi.Subnet,3) = PARSENAME(di.IP_Address,3)
AND PARSENAME(bi.Subnet,2) = PARSENAME(di.IP_Address,2)
GROUP BY Building_Name;





Only issue with using parsename() is that it is slow and will disallow the use of indexes on the joining columns if they exist.

Cool
Lynn Pettis

For better assistance in answering your questions, click here
For tips to get better help with Performance Problems, click here
For Running Totals and its variations, click here or when working with partitioned tables
For more about Tally Tables, click here
For more about Cross Tabs and Pivots, click here and here
Managing Transaction Logs

SQL Musings from the Desert Fountain Valley SQL (My Mirror Blog)
ChrisM@Work
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Lynn Pettis (8/14/2012)
ChrisM@Work (8/14/2012)
Here's an alternative using PARSENAME()

SELECT
bi.Building_Name,
COUNT(di.DeviceNum) NumberOfDevices
FROM #Building_Information bi
INNER JOIN #Device_Information di
ON PARSENAME(bi.Subnet,4) = PARSENAME(di.IP_Address,4)
AND PARSENAME(bi.Subnet,3) = PARSENAME(di.IP_Address,3)
AND PARSENAME(bi.Subnet,2) = PARSENAME(di.IP_Address,2)
GROUP BY Building_Name;







Only issue with using parsename() is that it is slow and will disallow the use of indexes on the joining columns if they exist.


Absolutely. Your alternative, using LIKE with a wildcard to the right of the test string, is SARGable. Thanks for the reminder, Lynn.

“Write the query the simplest way. If through testing it becomes clear that the performance is inadequate, consider alternative query forms.” - Gail Shaw

For fast, accurate and documented assistance in answering your questions, please read this article.
Understanding and using APPLY, (I) and (II) Paul White
Hidden RBAR: Triangular Joins / The "Numbers" or "Tally" Table: What it is and how it replaces a loop Jeff Moden
Exploring Recursive CTEs by Example Dwain Camps
Jared Karney
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I think we are missing a key aspect of what the OP is asking. This is closer to an SSRS question, I believe. There are 2 datasets in his report; 1 to provide the selected buildings as a drop-down list and another to provide the data based on the selection. Then, in SSRS you can allow "multiple selection" in the drop-down (report parameter). Check this out if you are trying to understand the multi-value parameter in SSRS:
http://social.msdn.microsoft.com/Forums/en-US/sqlreportingservices/thread/c02370b5-aeda-47ec-a3a8-43b2ec1e6c26/

Thanks,
Jared
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