Database connectivity toolset and nested transaction

Is it possible to make nested transactions with the Database Connectivity Toolset ?
By nested transactions I mean that I want to open a transaction inside a transaction.
I use LabVIEW 6.1 and Database Connectivity Toolset 1.1
Any ideas are welcome.

You may be able to do this in a different manner. Your options depend on how the database has structured the data. For example you can have a table defining "measures", another table defining "measure setps" and so on.
Each measure has an ID (MID) and each measure step has an ID (MSID) and these can be related to each other to provide the hierarchy. So in this case you could just get a measure, then query for all the measure steps that match (the MID and MSID) and sort them based on some attribute/criteria and work down in that manner.
This would provide a clean data architecture and enable you to reuse steps in multiple measures if you needed to. I'm not sure how your database is building the hierarchy, in the end there are some parent ch
ild relationships defined ... these would be very similar to the IDs referred to above.
Like you said, had to explain without a picture.
Regards,
Kamran

Similar Messages

Database connectivity toolset and microsoft access

Bonjour,
je suis débutante labview et j'aurais besoin d'aide...
voici mon pb:
j'ai créé une table sous microsoft access et j'aimerais lire les données à partir de labview en utilisant "database connectivity toolset". les vi utilisés sontpen connection, select data et close connection.
le vi "open connection" demande le 'connection information': j'ai donc donné le chemin ou se trouve mon fichier .udl
ce fichier udl est configuré comme cela:
fournisseur: microsoft jet et connexion: le chemin ou se trouve le fichier access.
mais ca ne marche pas! j'ai une erreur apres le vi select data, qui me dit 'erreur syntax'
je ne sais pas si j'utilise les bons vi....
merci pour une réponse rapide.

Bonjour,
Tout d'abord, vous devez vérifiez si la création du fichier UDL est correcte. Ci-dessous une note d'application décrivant étape par étape cette procédure:
* Creating a Microsoft Data Link file (.UDL) for Connecting to Microsoft Access in LabVIEW
http://digital.ni.com/public.nsf/websearch/1D5EB4DCBD13106486256B9D005E11B0?OpenDocument
Ensuite, testez l'exemple standard "Connection example.vi" fourni avec le toolkit Database Connectivity.
Dans LabVIEW, allez dans le Menu Aide >> Recherche d'exemples ... puis sélectionnez Toolkits & Modules >> Connection aux bases de données >> Connection example.
Si la connection échoue, l'exemple doit renvoyer une erreur avec un code et un descriptif. Ces informations sont indispensables pour débuter un débuggage (l
es codes d'erreurs classiques sont référencés sur le web et des notes d'applications sont fournies pour les corriger).
Cordialement.
Matthieu Gourssies
National Instruments France.

Memory leak when using database connectivity toolset and ODBC driver for MySQL

The "DB Tools Close Connection VI" does not free all the memory used when "DB Tools Open Connection VI" connects to "MySQL ODBC Driver 3.51".
I have made a small program that only opens and close the connection that I run continously and it's slowly eating all my memory. No error is given from any of the VI's. (I'm using the "Simple Error Handler VI" to check for errors.)
I've also tried different options in the DSN configuration without any results.
Attachments:
TestProgram.vi ‏16 KB
DSNconfig1.jpg ‏36 KB
DSNconfig2.jpg ‏49 KB

Also,
I've duplicated the OPs example: a simple VI that opens and closes a connection. I can say this definately causes a memory leak.
Watching the memory:
10:17AM - 19308K
10:19AM - 19432K
10:22AM - 19764K
10:58AM - 22124K
Regards,
Ken
Attachments:
OpenCloseConnection.vi ‏13 KB

When using the Database Connectivity Toolset, reads and writes with long binary fields are incompatible.

I am trying to write LabVIEW Variants to long binary fields in a .mdb file using the Database Connectivity Toolset. I get errors when trying to convert the field back to a variant after reading it back from the database.
I next tried flattening the variant before writing it and ultimately wound up doing the following experiments:
1) If I use DB Tools Insert Data to write an ordinary string and read it back using a DB Tools Select Data, the string is converted from ASCII to Unicode.
2) If I use DB Tools Create Parameterized Query to do an INSERT INTO or an UPDATE operation, specifying that the data is BINARY, then read it back using a DB Tools Select Data,
the length of the string is prepended to the string itself as a big-endian four-byte integer.
I can't think of any way to do a parameterized read, although the mechanism exists to return data via parameters.
Presuming that this same problem affects Variants when they are written to the database and read back, I could see why I get an error. At least with flattened strings I have the option of discarding the length bytes from the beginning of the string.
Am I missing something here?

David,
You've missed the point. When a data item is flattened to a string, the first four bytes of the string are expected to be the total length of the string in big-endian binary format. What is happening here is that preceding this four-byte length code is another copy of the same four bytes. If an ordinary string, "abcdefg" is used in place of the flattened data item, it will come back as <00><00><00><07>abcdefg. Here I've used to represent a byte in hexadecimal notation. This problem has nothing to do with flattening and unflattening data items. It has only to do with the data channel consisting of writing to and reading from the database.
I am attaching three files that you can use to demonstrate the problem. The VI file c
ontains an explanation of the problem and instructions for installing and operating the demonstration.
Ron Martin
Attachments:
TestLongBinaryFields.vi ‏132 KB
Sample.UDL ‏1 KB
Sample.mdb ‏120 KB

How to store jpeg images in SQL server using NI database Connectivity Toolset. Can anyone please help me in this regard.

Please tell how to store jpeg images in SQL Server using NI Database Connectivity Toolset.

http://www.w3schools.com/sql/sql_datatypes.asp
You setup a field as BLOB and store the binary of the picture there. Depending on the database it can be called differently as you can see in the link, in SQL server there's even a Image datatype.
/Y
LabVIEW 8.2 - 2014
"Only dead fish swim downstream" - "My life for Kudos!" - "Dumb people repeat old mistakes - smart ones create new ones."
G# - Free award winning reference based OOP for LV

Database connectivity toolset

Hi,
I am using the VI "DB Tools Select Data" from the database connectivity toolset. And I have a problem with the VI "DB Tools Execute Query" that is included. I would like to select a specific column from a specific table in my database and it is ok so long the name of the table is just one work, example "Names", but if the name of the table consists of two words ("Last Name") I get error, the message says that it can't find the table Last, i.e. not the whole string is read, just the first part. How can I manage to get the "Conn Execute.vi" to read the whole SQL query? Any suggestions?
Attachments:
Copy_DB Tools Select Data.vi ‏32 KB

As far as I know and what I experienced, there are no blanks allowed (and some other special characters), both in table names and column names.
Just replace the blanks with an underscore and it should work.
Using LV8.0
Don't be afraid to rate a good answer...

Listener EA2: database connection pool and connection revalidation

Hi all,
As one can expect from early adopter release there could be some bugs but I can't find any references in forum to my situation:
* My 11g XE database and listener are starting as windows services when server boots operating system (Windows Server 2003 R2).
* I configured my web server (unsupported Jetty 9.0.0.M1) to start as windows service when operating system starts.
* Apex Listener 2.0.0.268.17.05 configured to connect with XE using JDBC thin driver with default settings (initial pool size 3, max statements 10, min connections 1, max connections 10, inactivity timeout 1800, abandoned connection timeout 900)
* Because web server starts a bit faster than Oracle database when apex connects first time it gets "ORA-12528, TNS:listener: all appropriate instances are blocking new connections" (could be that database still starting but already registered service with listener)
* From listener.log file I can see that all further connections made from Apex listener succeeds
* When I try to open any apex page with browser I am getting 404 error and apex listener logs error (*time is 2 days after system startup*):
2012-11-30 3:56:02 PM oracle.dbtools.common.config.db.DatabaseConfig badConfiguration
SEVERE: The pool named: apex is not correctly configured, error: Listener refused the connection with the following error:
ORA-12528, TNS:listener: all appropriate instances are blocking new connections
ConnectionPoolException [error=BAD_CONFIGURATION]
     at oracle.dbtools.common.jdbc.ConnectionPoolException.badConfiguration(ConnectionPoolException.java:62)
     at oracle.dbtools.common.config.db.DatabaseConfig.badConfiguration(DatabaseConfig.java:146)
     at oracle.dbtools.common.config.db.DatabaseConfig.createPool(DatabaseConfig.java:168)
     at oracle.dbtools.common.config.db.DatabaseConfig.getConnection(DatabaseConfig.java:68)
     at oracle.dbtools.common.jdbc.ora.OraPrincipal.connection(OraPrincipal.java:25)
     at oracle.dbtools.apex.ModApexContext.getConnection(ModApexContext.java:320)
     at oracle.dbtools.apex.Procedure.getProcedure(Procedure.java:166)
     at oracle.dbtools.apex.OWA.validateProcedure(OWA.java:384)
     at oracle.dbtools.apex.security.Security.isValidRequest(Security.java:171)
     at oracle.dbtools.apex.ModApex.validateRequest(ModApex.java:233)
     at oracle.dbtools.apex.ModApex.doGet(ModApex.java:79)
     at oracle.dbtools.apex.ModApex.service(ModApex.java:263)
     at oracle.dbtools.rt.web.HttpEndpointBase.modApex(HttpEndpointBase.java:288)
     at oracle.dbtools.rt.web.HttpEndpointBase.service(HttpEndpointBase.java:127)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:848)
     at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:665)
     <... Jetty web server stack ...>
     at java.lang.Thread.run(Unknown Source)
2012-11-30 3:56:02 PM oracle.dbtools.rt.web.HttpEndpointBase modApex
* Oracle listener log for same time (no errors here):
30-NOV-2012 15:56:01 * (CONNECT_DATA=(CID=(PROGRAM=JDBC Thin Client)(HOST=__jdbc__)(USER=SYSTEM))(SERVICE_NAME=xe)(CID=(PROGRAM=JDBC Thin Client)(HOST=__jdbc__)(USER=SYSTEM))) * (ADDRESS=(PROTOCOL=tcp)(HOST=127.0.0.1)(PORT=1078)) * establish * xe * 0
30-NOV-2012 15:56:01 * (CONNECT_DATA=(CID=(PROGRAM=JDBC Thin Client)(HOST=__jdbc__)(USER=SYSTEM))(SERVICE_NAME=xe)(CID=(PROGRAM=JDBC Thin Client)(HOST=__jdbc__)(USER=SYSTEM))) * (ADDRESS=(PROTOCOL=tcp)(HOST=127.0.0.1)(PORT=1079)) * establish * xe * 0
30-NOV-2012 15:56:01 * (CONNECT_DATA=(CID=(PROGRAM=JDBC Thin Client)(HOST=__jdbc__)(USER=SYSTEM))(SERVICE_NAME=xe)(CID=(PROGRAM=JDBC Thin Client)(HOST=__jdbc__)(USER=SYSTEM))) * (ADDRESS=(PROTOCOL=tcp)(HOST=127.0.0.1)(PORT=1080)) * establish * xe * 0
30-NOV-2012 15:56:01 * (CONNECT_DATA=(CID=(PROGRAM=JDBC Thin Client)(HOST=__jdbc__)(USER=SYSTEM))(SERVICE_NAME=xe)(CID=(PROGRAM=JDBC Thin Client)(HOST=__jdbc__)(USER=SYSTEM))) * (ADDRESS=(PROTOCOL=tcp)(HOST=127.0.0.1)(PORT=1081)) * establish * xe * 0
* For some reason apex listener keeps first connection status and won't try to establish new connection if first attempt finished with ORA-12528
* The same scenario is valid when at time of web server start oracle database/listener is not available - even if database and listener starts and apex successfully establishes further connections all apex pages gets 404 error
* If I restart web server windows service (while oracle db and listener still running) browser opens apex pages without errors and apex listener does not log any errors
* I know that I can avoid this error delaying start of web server windows service but it would be nice to have production release 2.x without such bugs

Hi,
Is there any way to use the connection pool or Datasource while connecting to database?If I am using a stateless sesssion bean and using a Data Access layer which just creates a database session to write the persistence toplink objects how I can make use of application server connection pool?Hi Vinod,
Yes, TopLink allows you to use the app server's connection pooling and transaction services. Chapter 2 of the Oracle9iAS TopLink Foundation Library Guide provides details as do the TopLink examples. The easiest way to set this up is by using the sessions.xml file. The sample XML below is from the file <toplink903>\examples\ias\examples\ejb\sessionbean\sessions.xml. Here we are adding the datasource defined in OC4J and specifying that we are using the OC4J transaction controller also.
<login>
<user-name>sa</user-name>
<password></password>
<datasource>java:comp/env/jdbc/ejbJTSDataSource</datasource>
<uses-external-transaction-controller>true</uses-external-transaction-controller>
<uses-external-connection-pool>true</uses-external-connection-pool>
</login>
<external-transaction-controller-class>oracle.toplink.jts.oracle9i.Oracle9iJTSExternalTransactionController</external-transaction-controller-class>
When using this approach you need to change your TopLink code slightly in the EJB methods:
a. Acquire the ACTIVE unit of work from the server
session (again, see the EmployeeSessionEJB code
example) with something like:
UnitOfWork uow = clientSession.getActiveUnitOfWork();
b. Calls to uow.commit() can be ommitted or commented out
because the EJB will handle this. Note that of course
the methods you create in the EJB that are using this
approach must have TX Required (default).
Hope this helps.
Pete

How many number of database connections used in a transaction

Hi All,
We are using weblogic 8.1 with Oracle 9i both running on windows 2000. We are trying to estimate the potential resource usage in the system we are building. As part of this activity we want to find out how the database connections are used for entity beans -
If a session bean calls more than one entity beans
(each method in the entity bean doing one update) does weblogic use the same database connection for all the entity beans or does it use seperate connections ? Is such behaviour documented somewhere ?
Here the assumption is all the entity beans are linked to the same datasource.
If the (default) behaviour is to use seperate connections is there a way to make it use one connection across multiple entity beans.
Thanks
Kingshuk

Hi Bodapati,
Sorry for the delay in replying to this.
There is optimization, which will use the XA
connections from the pool. Can you tell me what your
observations are? I may be able to see if we can tune it.From our tests the XA driver too appear to make use of one connection only for the life of the transaction. There is a good document here explaining how it is ensured that only one connection is used - http://e-docs.bea.com/wls/docs81/oracle/trxjdbcx.html#1083132
Quoting from the above URL :
When a thread attempts to use a connection, the XA jDriver calls xa_open (and xa_start) to create the connection and associate it with the thread. After the database connection is created, the connection remains associated with the thread; the driver does not call xa_close. When the thread subsequently needs a database connection, it uses the same database connection associated with it, even though it appears to get and return a connection from the JDBC connection pool
I am not sure why you say the connections will be
blocked. One connection will be blocked only if you are > using non-XA driver to setup the pool, until the
transaction commits. For XA there is no need to reserve
the same connection for the transaction.Probably my understanding on this is incorrect and I need to read up. I was under the impression that - once a transaction begins, each connection used within that transaction, is enlisted as a part of that transaction and can not be used by in another transaction until the transaction commits or rollsback.
Thanks
Kingshuk

How to get a recordset defined by primarykeys using the LabVIEW Database Connectivity Toolset?

Hi folks.
I'm using LabVIEW with the LabVIEW Db Toolset and Microsoft Access. The table contains 18 columns with a growing nr of rows.Now I want to get the whole recordset containing all columns defined by my primary keys. My SQL-statement is sofar:
SELECT ALL FROM IMPULS_STATOR WHERE FAB = [string] AND LDATE = [datestring] AND ADATE = [datestring]
But every time I end up with an error message saying "Invalid string: specified field does not exist or contains an unsupported character". I mutated the statement several times, adding or removing spaces, colons, etc.
What am I doing wrong?
Thanks in advance

Thanks, Dennis.
Unfortunately, I`m still encountering some problems with the DateValue function. My date/time field has this format: yyyy-mm-dd hh:nn:ss . If I use DateValue, nothing will be returned. Changing the format to yyyy-mm-dd in the Access DB didn`t help and I do need the time. Combining DateValue and TimeValue let to several errors. Using only TimeValue did not help me out. LabVIEW does not indicate errors anymore, therefore the syntax should be fine. But I don`t get any information back from my database.

Labview Database Connection Toolkit and decimal point

Hi,
on my system I use "," (comma) as decimal point.
In Labview Options I unflagged "Use localized decimal point", and numeric controls and indicators use "." (dot) as decimal point.
The problem is that Labview Database Connection Toolkit keeps returning floating point numbers as strings with comma as decimal point.
Has anyone experienced this issue?
Is this related to Labview or MySQL ODBC Connector (that I'm using to connect to a mySQL DB)?
Thanks in advance for any help,
Marco

You have two or three places to look. First there is the DCT. Second, there's a couple layers there that could cause problems (the mySQL drivers and ADO) and then there's even the posibility that the issue could be in the DBMS itself.
I would start by burrowing down through all the DCT layers and find the spot where the results are actually being read back fromt he database. If the resutls are read as variants and converted to LV datatypes, the problem is on the LV side. If the values are being read as strings and converted, the problem coiuld be on the other side.
Mike...
Certified Professional Instructor
Certified LabVIEW Architect
LabVIEW Champion
"... after all, He's not a tame lion..."
Be thinking ahead and mark your dance card for NI Week 2015 now: TS 6139 - Object Oriented First Steps

Parallel database connections and single query between databases

Hi, I am looking to execute this SQL query between 2 different databases to update a local database based on data selected from a remote one.
e.g.:
- Local database name: db1
- local database schema: dbo
- local database table1
- remote database name: db2
- remote database schema: dbo
- Remote database table: table2
- Query: "SELECT * FROM db2.dbo.table2 WHERE NOT EXISTS(SELECT * FROM db1.dbo.table1)" <- This gets e the record set i would need to insert, and I already have a vi to do that kinda thing.
How do I go about this?
Thanks,
Mohamed

Mohamed,
There is a VI in the Database Connectivity Toolkit that allows you to execute SQL queries: DB Tools Execute Query.
http://zone.ni.com/reference/en-XX/help/370016E-01/lvdatabase/db_tools_execute_query/
Is this what you are looking for?
Drew T.
NIC AE Specialist

Database connection timeouts and datasource errors

Connections in the pool randomly die overnight. Stack traces show that for some reason, the evermind driver is being used even though the MySql connection pool is specified.
Also, the evermind connection pool is saying connections aren't being closed, and the stack trace shows they're being allocated by entity beans that are definitely not left hanging around.
Sometimes we get non-serializable errors when trying to retrieve the datasource (this is only after the other errors start). Some connections returned from the pool are still good, so the application limps along.
EJBs and DAOs both use jdbc/SQLServerDSCore.
Has anyone seen this problem?
<data-sources>
     <data-source
          class="com.mysql.jdbc.jdbc2.optional.MysqlConnectionPoolDataSource"
          name="SQLServerDSCore"
          location="jdbc/SQLServerDSCore"
          xa-location="jdbc/xa/SQLServerXACore"
          ejb-location="jdbc/SQLServerDSCore"
          connection-driver="com.mysql.jdbc.Driver"
          min-connections="5"
          username="xxx"
          password="xxx"
          staleness-timeout="3600"
          alive-poll-query="SELECT 1 FROM medispan"
          url="jdbc:mysql://1.2.3.4:3306/dbo?autoReconnect=true&autoReconnectForPools=true&cachePrepStmts=true&is-connection-validation-required=true"
          inactivity-timeout="30"
     >
          <property name="autoReconnect" value="true"/>
          <property name="autoReconnectForPools" value="true"/>
          <property name="is-connection-validation-required" value="true"/>
          <property name="cachePrepStmts" value="true"/>
     </data-source>
</data-sources>

Rick,
OC4J 9.0.4.0.0 - BTW, do you know of any patches?As far as I know, there are no patches for the 9.0.4
production version of OC4J stand-alone.
I'm using container managed persistence,It was not clear to me, from your previous post, that you
are using CMP entity beans.
I found staleness-timeout and alive-poll-query
somewhere on a website when trying to track this
down. Here's four sources:Those sources refer to OrionServer -- and an older version, too, it seems.
Like all other Oracle products that start out as somebody
else's -- including, for example, JBuilder (that became "JDeveloper"), Apache Web Server (that became "Oracle HTTP Server") and TopLink -- their development paths diverge, until, eventually, there is absolutely no similarity between them at all. Hence, the latest versions of OC4J and "OrionServer" are so different, that you cannot be sure that something that works for "OrionServer" will work for OC4J.
I recall reading something, somewhere, sometime about configuring OC4J to use different databases (other than Oracle), but I really don't remember any details (since it was not relevant to me, because we only use Oracle database). In any case, it is possible to use a non-Oracle database with OC4J.
Good Luck,
Avi.

Database connection encryption and integrity with ColdFusion and Oracle thin client

As ColdFusion datasource we are using the Oracle thin client to connect with the database. So, basically we are using a JDBC URL such as jdbc:oracle:thin:@... and as Driver Class oracle.jdbc.OracleDriver. This works successfully however we would like to set encryption and integrity parameters as well. In Java this is done similarly by setting a Properties object prior to getting a connection as follows:
Properties prop = new Properties();
prop.put("oracle.net.encryption_client", "REQUIRED");
prop.put("oracle.net.encryption_types_client", "( DES40 )");
prop.put("oracle.net.crypto_checksum_client", "REQUESTED");
prop.put("oracle.net.crypto_checksum_types_client", "( MD5 )");
OracleDataSource ods = new OracleDataSource();
ods.setProperties(prop);
ods.setURL("jdbc:oracle:thin:@localhost:1521:main");
Connection conn = ods.getConnection();
Is there a way that I can pass these parameters to the ColdFusion datasource. Ideally, I would love to do this centrally in such way that a change to all the cfquery or cfstoredproc is not needed.
I also know that in application servers such as Oracle AS there is an option when creating a datasource which says "Add Properties". In there you can add such properties. So, I was thinking of maybe creating a JNDI DS in the app. server and then magically connecting to it but this may have some impacts on the app.
Besides this I was also thinking of communicating with the CF datasource through the CF admin API (cfide.adminapi.administrator) and also the option of extending the Oracle driver so that when CF connects with it these params are already set.
I would love to have your professional opinion and suggestions on this.

I believe the thin driver actually needs the IP address (not the DNS name). Also, is "java" the name of the Oracle instance to which you are trying to connect?
Try the following:String driver = "jdbc:oracle:thin";
String dbIP = "W2RZ1NXG01's IP address";
String dbPort = "1530";
String dbSid = "java";
String dbUser = "Admin";
String dbPswd = "apassword";
String cnctStr = driver + ":@" + dbIP + ":" + port + ":" + dbSid;
try
    Class.forName("oracle.jdbc.driver.OracleDriver");
    con = DriverManager.getConnection( cnctStr, dbUser, dbPswd );
    stmt = con.createStatement();
    stmt.executeUpdate(createString);
    stmt.close();
    con.close();
catch(SQLException ex)
    System.err.println( "The following SQLException occurred: " + ex );
    System.err.println( "Message: " + ex.getMessage() );

ALI Database Connection Configuration and Monitoring

Is there some way -- documented or not -- to set the number of connections that ALI uses between it and the SQL Server or Oracle instance behind it? If so, what's the default setting (and how do you override it)?
Also, can we somehow monitor the number of active connections that ALI has to the database?
Thanks!
Chris Bucchere | bdg | [email protected] | http://www.thebdgway.com

Chris,
I thought a lot of this was covered in a previous post -
[url http://forums.bea.com/bea/message.jspa?messageID=400007669&tstart=0]http://forums.bea.com/bea/message.jspa?messageID=400007669&tstart=0
The maximum # of DB connections can be set in a config file. The portal itself control the actual number of connections between the min & max in its OpenDB connection pooling logic. I believe the default max # of connections is 40 connections.
I believe the "Counter Monitoring System" - described in the G6 Administration Guide - provide a means to monitor the number of DB connections although I believe the same info could be obtained through other means at the OS-level.
John
Is there some way -- documented or not -- to set the
number of connections that ALI uses between it and
the SQL Server or Oracle instance behind it? If so,
what's the default setting (and how do you override
it)?
Also, can we somehow monitor the number of active
connections that ALI has to the database?
Thanks!
Chris Bucchere | bdg | [email protected] |
http://www.thebdgway.com

Database Connectivity Toolset-Fetching Data from Database

Hello guys,
Currently I am doing some applications that include with database manipulation. The data that I am using now coming from Microsoft Access.
My Idea is to fetch the data from the specified table, specified column and specified row.... yeah we could do it using SQL query that we wrote on the Block Diagram...but that will be apply for the one condition that we set.
How about for the next time when we want to pull data from the same database but from different table/column/row using the same application..yeah we have to change the sql query
Why don't we use 'ring' in Front Panel to choose the database we want like to...
example
If we choose
Dominant = Right
Age = 25-34
Sex=Female
Weight= 50-69
Height= 175-184
Then the answer that will come out might be 78 in numeric indicator
So and the next time if I choose
If we choose
Dominant = Left
Age = 25-34
Sex=Male
Weight= 50-69
Height= 175-184
Then the answer will be 77 in numeric indicator...
So...my questions is simple....how to do it....have anyone here try to use ring to make selections in their database
I'll attach my empty applcation so that you all can see the Front Panel...and what exactly my Idea is...
TQ
Attachments:
fetching..vi ‏19 KB

I couldn't look at your VI (7.0), but you can read (and change) the strings in a ring by using a property node.
To create one, right click on the control or the terminal and select Create>>Property Node. Then, click on the property and find Strings[] in the list. This is an array of all the strings in the ring. You can wire it, along with the ring value, into Index Array and you will get the string you chose.
You can now use this string to build your SQL query, no need for numbers and codes.
You can further customize this by using different strings for each field. For example, you can have one ring which will select the field, and based on that, another ring will now have only the values relevant to that field.
You can save these values in an array and that way have an unlimited query.
Correct me if I'm wrong, but don't the DB tools allow you to extract data directly (For instance, the DB Tools Select Data VI)? Shouldn't this allow you to extract all the info you need?
Try to take over the world!

Database connectivity toolset and nested transaction

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