tblTransaction doesn't contain any data, so the fields from tblAccount and tblAcctDetails won't display. How can I get records to display even if there are no matching records in tblTransaction?
Right click the link between tblTransaction and tblAccount to open Link Options. From here, you can change the Join Type to a Right Outer Join. (Returns all rows from the right table, even if there are no matches in the left table.)
Alternatively you can replace your tables with a SQL command and perform any links or unions manually.
You go through the UNION ALL Query for fetching data and try it.
SELECT expression1, expression2, ... expression_n
FROM tables
[WHERE conditions]
UNION
SELECT expression1, expression2, ... expression_n
FROM tables
[WHERE conditions];
Related
I have two tables, neither with a primary id. The same combination of fields uniquely identifies the records in each and makes the records between the two tables relate-able (I think).
I need a query to combine all the records from one table and only the records from the second not already included from the first table. How do I do this using 'not equal to' joins on multiple fields? My results so far only give me the records of the first table, or no records at all.
Try the following:
SELECT ECDSlides.[Supplier Code], ECDSlides.[Supplier Name], ECDSlides.Commodity
FROM ECDSlides LEFT JOIN (ECDSlides.Commodity = [Mit Task Details2].Commodity) AND (ECDSlides.[Supplier Code] = [Mit Task Details2].[Supplier Code])
WHERE [Mit Task Details2].Commodity Is Null;
This might be what you are looking for
SELECT fieldA,fieldB FROM tableA
UNION
SELECT fieldA,fieldB FROM tableB
Union should remove automatically. 'Union All' would not.
If, for some reason, you get perfect duplicates and they are not removed, you could try this :
SELECT DISTINCT * FROM (
SELECT fieldA,fieldB FROM tableA
UNION
SELECT fieldA,fieldB FROM tableB
) AS subquery
I have a sqlite database that I'm trying to build a query. The table column I need to retrieve is iEDLID from the table below :
Right now all I have to go on is a known iEventID from the table below :
And the the nClientLocationID from the table below.
So the requirements are I need to get current iEDLID to write, lookup from tblEventDateLocations for dEventDate and the tblLocation.nClientLocationID based on the tblLocations.iLocationID I already have and event selected on this screen.
So I would need a query that does a "SELECT DISTINCT table EventDateLocations.iEDLID FROM tblEventDateLocations ...."
So basically from another query I have the iEventID I need, and I have the event ID i need but where the dEventDate=(select date('now')) I need to retrieve the iEventDateID from table EventDates.iEventDateID to use on the table EventDateLocations
this is the point where I'm trying to wrap my head around the joins for this query and the syntax...
It seems like you want this:
select distinct edl.iEDLDID
from
tblEventDateLocations edl
join tblEventDates ed on edl.EventDateId = ed.EventDateId
where
ed.EventId = ?
and ed.dEventDate = date('now')
and edl.nClientLocationID = ?
where the ? of course represent the known event ID and location ID parameters.
Since nClientLocationId appears on table tblEventDateLocations you do not need to join table tblLocations unless you want to filter out results whose location ID does not appear in that table.
I am trying to join two tables and keep getting an error message that states...
The data types text and text are incompatible in the equal to operator.
I need to know how to effectively query the two tables without re-importing the data. The import took hours to run.
Both fields have a data type of TEXT.
SELECT doc4., doc.
FROM doc4 INNER JOIN
doc4 ON doc.unid = doc4.unid
unid is the field and it is a text type in both tables..
Assuming this is for MS-SQL, the = operator does not work directly for text, even though both fields are the same type.
The recommendation for Server 2014 at least is to replace it with one of
varchar(max), nvarchar(max), or varbinary(max) data types.
(ref. https://msdn.microsoft.com/en-us/library/ms143729.aspx)
Text has been deprecated, but if it's not convenient to replace it, it's still possible (though less efficient) to compare text fields by using cast.
SELECT doc4.something, doc.something
FROM doc
INNER JOIN doc4
ON CAST(doc.unid AS varchar(max)) =
CAST(doc4.unid AS varchar(max));
(Or say "FROM doc4 INNER JOIN doc", whichever is the prefered order.)
By default, when you perform query to sphinx table, Sphinx engine returns rows which are already sorted by query weight and does it really fast.
So, when I do this:
select
article.name
from article
left join article_ft on article._id=article_ft.id
where article_ft.query='some text;mode=any;';
Where:
article is InnoDB like table.
article_ft is Sphinx table.
Both of them (article.name and article_ft) contain these data (1 line = 1 row):
This is text.
This is also some text.
This is another text.
Sphinx engine will return rows like:
This is also some text.
This is text.
This is another text.
But, If I do something like this:
select
article.name
from article
left join article_ft on article._id=article_ft.id
left join article_category on article.category=article_category._id
where article_ft.query='some text;mode=any;';
It seems, MariaDB sorts it by its own way here.
Even If I provide Sphinx's 'sort' option like this:
select
article.name
from article
left join article_ft on article._id=article_ft.id
left join article_category on article.category=article_category._id
where article_ft.query='some text;mode=any;sort=extended:#weight desc;';
Still it doesn't work.
Changing order of joins doesn't work as well.
If I use order by article_ft.weight DESC MariaDB returns error message like:
Error: ER_ILLEGAL_HA: Storage engine SPHINX of the table `article_ft` doesn't have this option
in case if article has no rows that could match condition like article.category=50.
article_ft was created using this:
CREATE TABLE article_ft
(
id BIGINT NOT NULL,
weight INTEGER NOT NULL,
query VARCHAR(3072) NOT NULL,
INDEX(query)
) ENGINE=SPHINX CONNECTION="sphinx://192.168.1.98:9402/article_ft";
How to use this "magical" sort by weight feature if query contains more joins with no errors in return?
Thanks forward, for any reply!
P.S. Can't provide you a fiddle for this because I do not know any SQL fiddle online service which supports Sphinx Tables. Also if you found more relevant topic question I'll appreciate that.
Put the article_ft table first in the query. ie ... article_ft inner join article ...
Or maybe use FORCE INDEX, to force the use of the query index. Then it might honour the sort order.
Failing that use a subquery?
(select name,weight from article_ft ... ) order by weight desc;
I have two tables - tool_downloads and tool_configurations. I am trying to retrieve the most recent build date for each tool in my database. The layout of the DB is simple. One table called tool_downloads keeps track of when a tool is downloaded. Another table is called tool_configurations and stores the actual data about the tool. They are linked together by the tool_conf_id.
If I run the following query which omits dates, I get back 200 records.
SELECT DISTINCT a.tool_conf_id, b.tool_conf_id
FROM tool_downloads a
JOIN tool_configurations b
ON a.tool_conf_id = b.tool_conf_id
ORDER BY a.tool_conf_id
When I try to add in date information I get back hundreds of thousands of records! Here is the query that fails horribly.
SELECT DISTINCT a.tool_conf_id, max(a.configured_date) as config_date, b.configuration_name
FROM tool_downloads a
JOIN tool_configurations b
ON a.tool_conf_id = b.tool_conf_id
ORDER BY a.tool_conf_id
I know the problem has something to do with group-bys/aggregate data and joins. I can't really search google since I don't know the name of the problem I'm encountering. Any help would be appreciated.
Solution is:
SELECT b.tool_conf_id, b.configuration_name, max(a.configured_date) as config_date
FROM tool_downloads a
JOIN tool_configurations b
ON a.tool_conf_id = b.tool_conf_id
GROUP BY b.tool_conf_id, b.configuration_name