I am currently working on a query in Access 2010 and I am trying to get the below query to work. I have the connection string between my local DB and the server that I am passing through to working just fine.
Select column1
, column2
from serverDB.dbo.table1
where column1 in (Select column1 from tbl_Name1)
In this situation table1 is the table on the server that I am passing through to get to, but the tbl_Name1 is the table that is actually in my Access DB that I am trying to use to create constraints on the data that I am pulling from the server.
When I try to run the query, I am getting the error that it doesn't think tbl_Name1 exists.
Any help is appreciated!
I just came across a solution that may help others in a similar situation.
This approach is easy because you can just run one query on your local Access database and get everything you need all at once. However, a lot of filtering/churning-through-results may be done on your own local computer behind the scenes, as opposed to on the remote server, so it may not necessarily be quick.
Steps
Create a query, make it a "Pass Through" query, and set up its "ODBC Connect Str" property to connect to the remote database.
Write the pass through query, something like SELECT RemoteId From RemoteTable and give your pass through query a name, maybe PassThroughQuery
Create a new query, make it a regular "Select" query.
Write your new query, using the pass through query you just created as a table in this new query (seems weird to use a query as a table, but it works) and join that PassThroughQuery "table" to your local table and filter it based on values in the local table, something like SELECT R.RemoteId, L.LocalValue FROM PassThroughQuery R INNER JOIN LocalTable L ON L.LocalId = R.RemoteId where L.LocalValue = 'SomeText'
This approach allows you to mix/join the results of a pass through query and the data in a local Access database table cleanly, albeit potentially slowly if there is a lot of data involved.
I think the issue is that a pass through query is one that is run on the server. Since one of the tables is located on the local Access file, it won't find the table.
Possible workaround if you must stay with the pass-through is you can build an SQL string with the results of the nested query rather than the query string itself (depending on the number of results this may or may not be practical)
e.g. Instead of Select column1 from tbl_Name1 you use "c1result1","c1result2",....
Related
I am not sure if this has been answered before but what I found i am not sure how to make work for me but here is my problem.
I have a database used to keep track of phones for multiple clients. What needs to be done is have a query that can be ran that will run against multiple databases on the same server. each database uses the same table name that I am looking at but the names are slightly different. I came up with this..
INSERT INTO `export db`.exportinfo2
SELECT *
FROM (SELECT * FROM `export db'.tentantnames).users
WHERE name = 'Caller ID:emergency' AND value > 0
What suppose to happen is from a table that has all the database names is is to got to each database and go into the table labeled users and run a where clause on the data then export results to a different database table
I know the code needs to be dynamic but I am not sure how to make it dynamic and function. The table that has all the names for the databases is automatically created every few days.. I am not sure what else needs to be said without sounding like i repeat myself but i just need help making a dynamic query that uses a table premade as database names and run a where statement on the same named table in each database which have their name stored in a different table.
You should look into Synonyms. It can be used to fulfill your purpose
I am trying to select from one database using condition in another but my problem is how to do this in my editor i used this code in my phpmyadmin environment and it work fine, but how will write same query in my source code,my problem here is how to connect to two different db in one statement
select * from users.message where sender in( select id from secured.reg_users)
As long as the 2 databases are in the same mysql server, the above query will work with a single connection. (Remember, phpmyadmin will connect to a single database as well at any point of time!) If not, then you can experiment with federated tables, but most likely you will not be able to do this in sql only.
In the latter case, your code needs to retrieve the list of ids from the secured.reg_users table, then use that list as parameter to the main query.
I am using MySQL Query Browser 1.2.17. My problem is that using EXACTLY the same query sometimes I get No database selected error.
I tried to find any dependence in using USE database; or FROM database.table.
I have no idea when will I get an error and when I won't and if I get I don't know how to solve this (since there is in the query USE database;).
UPDATE AND SOLUTION:
Since the problem was independent neither on the USE database; nor FROM database.table and has been observed RANDOMLY (ex. run query, it works, then immediately run again with the same query and it didn't work anymore), I recreated the database simply filling it with data from backup and it helped.
Best practice to write query.
databasename.tablename
example
SELECT * FROM database.table where 1 = 1
I am executing queries from Access 2010 on an Interbase database via ODBC (Easysoft) ver.7. Everything works fine except when i come to fire a Union query such as this:
SELECT TRIP.TRIPDATE, RESERVATION.BOOKINGREF, RESERVATION.LEADNAME, TRIP.DRIVERID, RESERVATION.STATUS, RESERVATION.DATECANCELLED, TRIP.TRANSPORTTYPEID
FROM TRIP INNER JOIN RESERVATION ON TRIP.TRIPID = RESERVATION.ARRIVALTRIPID
WHERE (((TRIP.TRIPDATE) Between #2/1/2012# And #2/29/2012#) AND ((TRIP.DRIVERID)=2) AND ((RESERVATION.DATECANCELLED) Is Null) AND ((TRIP.TRANSPORTTYPEID)=12))
UNION
SELECT TRIP.TRIPDATE, RESERVATION.BOOKINGREF, RESERVATION.LEADNAME, TRIP.DRIVERID, RESERVATION.STATUS, RESERVATION.DATECANCELLED, TRIP.TRANSPORTTYPEID
FROM TRIP INNER JOIN RESERVATION ON TRIP.TRIPID = RESERVATION.DEPARTURETRIPID
WHERE (((TRIP.TRIPDATE) Between #2/1/2012# And #2/29/2012#) AND ((TRIP.DRIVERID)=2) AND ((RESERVATION.DATECANCELLED) Is Null) AND ((TRIP.TRANSPORTTYPEID)=12));
When I run this query from Access I get
"ODBC --call failed, [Easysoft][Interbase]Dynamic SQL Error, SQL error
code = -104, Token unknown -line1,char 0, ((#-104)"
When running the select queries on their own they work fine but when joined via UNION I get this error.
Any help would be appreciated.
thanks
You don't mention if your query is a passthrough query or if you are using linked ODBC tables in an Access query.
If you are using a normal Access query
When using linked ODBC tables in a normal Access query, the Access data engine will rewrite the queries as necessary to make them compatible with the other database engine.
Sometimes, it can fail though.
Make sure each SELECT query works and returns correct data independently.
Try a simpler UNION query to make sure that the issue comes from the UNION keyword itself.
Try UNION ALL
Try using a pass-through query instead.
If you are using a pass-through query
Pass-through queries are send verbatim to the ODBC engine, and Access just collects the results without rewriting the query itself.
Make sure each SELECT query works as a pass-through query and returns correct data independently.
Make sure that the literal dates are properly formatted for Interbase SQL.
The ones you use are correct for Access SQL, but different databases accept different formats.
Try a simpler UNION query using simple SELECT statements involving 1 or 3 fields only.
Try UNION ALL.
You don't show it in your question, but just in case, if you used an ORDER BY statement, you have to wrap the UNION query.
Try to cast the data types of your fields. It may be that some fields's data are incorrectly interpreted and that the union fails because it assumes that the data retrieved is of different types.
Try using a standard Access query instead.
So here is my situation: I have a vendor supplied DB we cannot modify and a custom db that imports data from the vendor app and acts on it. Once records are imported form the vendor app, they cannot appear on the list of records to be imported. Also we only want to display the 250 most recent records that have not been imported.
What I originally started with was select the list of ids that have been imported from the custom db, and then query the vendor db, using the list of ids in a .Where(x => !idList.Contains(x.Id)) clause on the remote query.
This worked up until we broke 2100 records imported into the custom db, as 2100 is the limit on the number of parameters that can be passed into SQL. After finding out this was the actual problem and not the 'invalid buffer'/'severe error' ADO.Net reported, my solution was to remove the first 2000 ids in the remote query, and then remove the remaining records in the local query.
Having to pull back a large number of irrelevant records, just to exclude them, so I can get the correct 250 records seems very inelegant. Is there a better way to do this, short of doing a cross db stored procedure?
Thanks in advance.
This might not be the best answer, depending on how many records you're dealing with, but you could force the SQL to execute and just deal with it as in-memory objects. Calling the ToList() method will execute the SQL and convert to an IEnumerable .
What I might suggest is to have started by querying the vendor database first ordering the results by some kind of criteria (perhaps a date field, oldest to most recent).
You could do a Skip().Take() to "skim" the results and then take each bulk set and insert them into the custom db where the ID doesn't already exist. That way you avoid the problem you have now.
If you have db-create access to the SQL Server that the vendor's db is running on (or if your custom db is on the same server), you could create a "has been imported" table in a different database on that same server, and then write a stored proc that does a cross-database join of that table against the vendor db, e.g.:
select top 250 from vendordb.to_be_imported
where not exists
(select 1 from customdb.has_been_imported where idWasImported = idToBeImported)
order by whatever;
You might even be able to do this in Linq 2 SQL -- I've never tried adding objects from different databases into a single DataContext...