I'm looking for help with my query below. which is never returning anything for veggie... Is the way I have my WHERE statement written valid?
SELECT *
FROM newsfeed INNER JOIN newsfeedaction ON newsfeed.newsfeedactionid = newsfeedaction.newsFeedActionID
INNER JOIN person ON newsfeed.personID = person.personID
LEFT OUTER JOIN food ON newsfeed.foodID = food.foodID
LEFT OUTER JOIN veggie ON newsfeed.veggieID = veggie.veggieID
WHERE
(
newsfeed.veggieID IS NOT NULL
AND veggie.deleted = 'N'
)
OR
(
newsfeed.foodID IS NOT NULL
AND food.deleted = 'N')
The where clause is incomplete. The second set of conditions are to be completed.
Unless the VEGGIE.veggieid can be null (likewise for FOOD.foodid), use:
SELECT *
FROM NEWSFEED nf
JOIN NEWSFEEDACTION nfa ON nfa.newfeedactionid = nf.newsfeedactionid
JOIN PERSON p ON p.personid = nf.personid
JOIN FOOD f ON f.foodid = nf.foodid
AND f.deleted = 'N'
JOIN VEGGIE v ON v.veggieid = nf.veggieid
AND v.deleted = 'N'
The query is otherwise correct, but requires that NEWSFEED records must have supporting records in both the VEGGIE and FOOD tables.
A Union between the two sets of data did the trick and I read online that UNION between two selects is faster than a WHere with 2 groups
Related
I am working on SQL query which should return the list of Managers and the staff who reports to them.
Unfortunately there is no separate table for Employee or Staff but a single 'resource' table called ahsresources.
The managers are identified with a relation called 'C0'.
Even after trying various Joins, I am unable to extract the list. The idea is that a manager will run the report to see his reportees, as well as those staff who report to his own reportees
Example -
Now, if lets say HDY is running the query, then its should return him the below result
Below is the query I have created, but for the matter of understanding the issue, you can use the above example.
select a.description as manager1,a.rel_value as MGID,a.resource_id as Reportee1_MGR2,r.name,a.date_to as date, r.date_to,a1.resource_id as MG3ID,r1.name as Rep3Name,
a2.resource_id as MG4ID,r2.name as Rep4Name
from ahsrelvalue a
LEFT OUTER JOIN ahsresources r
ON r.resource_id = a.resource_id and r.client = a.client and a.date_to='12/31/2099'
LEFT OUTER JOIN ahsrelvalue a1
ON a1.rel_Value = a.resource_id and a1.client = a.client and a1.date_to = '12/31/2099'
LEFT OUTER JOIN ahsrelvalue a2
ON a2.rel_Value = a1.resource_id and a2.client = a1.client and a2.date_to = '12/31/2099'
LEFT OUTER JOIN ahsresources r1
ON r1.resource_id = a1.resource_id and r1.client = a1.client and a1.date_to='12/31/2099'
LEFT OUTER JOIN ahsresources r2
ON r2.resource_id = a2.resource_id and r2.client = a2.client and a2.date_to='12/31/2099'
where a.rel_Value = '$?resid' and a.rel_attr_id='C0' and r.date_to = '12/31/2099' and r1.date_to ='12/31/2099'
and r.status !='C' and r1.status!='C' and r2.status!='C'
In SQL Server, you can use a recursive query to traverse this hierarchical dataset:
with cte as (
select t.* from mytable where managerID = 6
union all
select t.*
from cte c
inner join mytable t on t.managerID = c.staffID
)
select * from cte
I am building a complex select statement, and when one of my values (pcf_auto_key) is null it will not disipaly any values for that header entry.
select c.company_name, h.prj_number, h.description, s.status_code, h.header_notes, h.cm_udf_001, h.cm_udf_002, h.cm_udf_008, l.classification_code
from project_header h, companies c, project_status s, project_classification l
where exists
(select company_name from companies where h.cmp_auto_key = c.cmp_auto_key)
and exists
(select status_code from project_status s where s.pjs_auto_key = h.pjs_auto_key)
and exists
(select classification_code from project_classification where h.pcf_auto_key = l.pcf_auto_key)
and pjm_auto_key = 11
--and pjt_auto_key = 10
and c.cmp_auto_key = h.cmp_auto_key
and h.pjs_auto_key = s.pjs_auto_key
and l.pcf_auto_key = h.pcf_auto_key
and s.status_type = 'O'
How does my select statement look? Is this an appropriate way of pulling info from other tables?
This is an oracle database, and I am using SQL Developer.
Assuming you want to show all the data that you can find but display the classification as blank when there is no match in that table, you can use a left outer join; which is much clearer with explicit join syntax:
select c.company_name, h.prj_number, h.description, s.status_code, h.header_notes,
h.cm_udf_001, h.cm_udf_002, h.cm_udf_008, l.classification_code
from project_header h
join companies c on c.cmp_auto_key = h.cmp_auto_key
join project_status s on s.pjs_auto_key = h.pjs_auto_key
left join project_classification l on l.pcf_auto_key = h.pcf_auto_key
where pjm_auto_key = 11
and s.status_type = 'O'
I've taken out the exists conditions as they just seem to be replicating the join conditions.
If you might not have matching data in any of the other tables you can make the other inner joins into outer joins in the same way, but be aware that if you outer join to project_status you will need to move the statatus_type check into the join condition as well, or Oracle will convert that back into an inner join.
Read more about the different kinds of joins.
Below is my query using a left join that works as expected. What I want to do is add another table filter this query ever further but having trouble doing so. I will call this new table table_3 and want to add where table_3.rwykey = runways_updatable.rwykey. Any help would be very much appreciated.
SELECT *
FROM RUNWAYS_UPDATABLE
LEFT JOIN TURN_UPDATABLE
ON RUNWAYS_UPDATABLE.RWYKEY = TURN_UPDATABLE.RWYKEY
WHERE RUNWAYS_UPDATABLE.ICAO = 'ICAO'
AND (RUNWAYS_UPDATABLE.TORA > 4000 OR LDA > 0)
AND (TURN_UPDATABLE.AIRLINE_CODE IS NULL OR TURN_UPDATABLE.AIRLINE_CODE = ''
OR TURN_UPDATABLE.AIRLINE_CODE = '')
'*************EDIT To CLARIFY *****************
Here is the other statement that inner join i would like to use and I would like to combine these 2 statements.
SELECT *
FROM RUNWAYS_UPDATABLE A, RUNWAYS_TABLE B
WHERE A.RWYKEY = B.RWYKEY
'***What I have so far as advice taken below, but getting syntax error
SELECT RUNWAYS_UPDATABLE.*, TURN_UPDATABLE.*, AIRPORT_RUNWAYS_SELECTED.*
FROM RUNWAYS_UPDATABLE
INNER JOIN AIRPORT_RUNWAYS_SELECTED
ON RUNWAYS_UPDATABLE.RWYKEY = AIRPORT_RUNWAYS_SELECTED.RWYKEY
LEFT JOIN TURN_UPDATABLE
ON RUNWAYS_UPDATABLE.RWYKEY = TURN_UPDATABLE.RWYKEY
NOTE: If i comment out the inner join and leave the left join or vice versa, it works but when I have both of joins in the query, thats when im getting the syntax error.
I always come across this question when searching for how to make LEFT JOIN depend on a further INNER JOIN. Here is an example for what I am searching when I am searching for "using LEFT JOIN and INNER JOIN in the same query":
SELECT *
FROM foo f1
LEFT JOIN (bar b1
INNER JOIN baz b2 ON b2.id = b1.baz_id
) ON
b1.id = f1.bar_id
In this example, b1 will only be included if b2 is also found.
Remember that filtering a right-side table in left join should be done in join itself.
select *
from table1
left join table2
on table1.FK_table2 = table2.id
and table2.class = 'HIGH'
I finally figured it out. Thanks for all your help!!!
SELECT * FROM
(AIRPORT_RUNWAYS_SELECTED
INNER JOIN RUNWAYS_UPDATABLE
ON AIRPORT_RUNWAYS_SELECTED.RWYKEY = RUNWAYS_UPDATABLE.RWYKEY)
LEFT JOIN TURN_UPDATABLE ON RUNWAYS_UPDATABLE.RWYKEY = TURN_UPDATABLE.RWYKEY
Add your INNER_JOIN before your LEFT JOIN:
SELECT *
FROM runways_updatable ru
INNER JOIN table_3 t3 ON ru.rwykey = t3.rwykey
LEFT JOIN turn_updatable tu
ON ru.rwykey = tu.rwykey
AND (tu.airline_code IS NULL OR tu.airline_code = '' OR tu.airline_code = '')
WHERE ru.icao = 'ICAO'
AND (ru.tora > 4000 OR ru.lda > 0)
If you LEFT JOIN before your INNER JOIN, then you will not get results from table_3 if there is no matching row in turn_updatable. It's possible this is what you want, but since your join condition for table_3 only references runways_updatable, I would assume that you want a result from table_3, even if there isn't a matching row in turn_updatable.
EDIT:
As #NikolaMarkovinović pointed out, you should filter your LEFT JOIN in the join condition itself, as you see above. Otherwise, you will not get results from the left-side table (runways_updatable) if that condition isn't met in the right-side table (turn_updatable).
EDIT 2: OP mentioned this is actually Access, and not MySQL
In Access, perhaps it's a difference in the table aliases. Try this instead:
SELECT [ru].*, [tu].*, [ars].*
FROM [runways_updatable] AS [ru]
INNER JOIN [airport_runways_selected] AS [ars] ON [ru].rwykey = [ars].rwykey
LEFT JOIN [turn_updatable] AS [tu]
ON [ru].rwykey = [tu].rwykey
AND ([tu].airline_code IS NULL OR [tu].airline_code = '' OR [tu].airline_code = '')
WHERE [ru].icao = 'ICAO'
AND ([ru].tora > 4000 OR [ru].lda > 0)
If it is just an inner join that you want to add, then do this. You can add as many joins as you want in the same query. Please update your answer if this is not what you want, though
SELECT *
FROM RUNWAYS_UPDATABLE
LEFT JOIN TURN_UPDATABLE
ON RUNWAYS_UPDATABLE.RWYKEY = TURN_UPDATABLE.RWYKEY
INNER JOIN table_3
ON table_3.rwykey = runways_updatable.rwykey
WHERE RUNWAYS_UPDATABLE.ICAO = 'ICAO'
AND (RUNWAYS_UPDATABLE.TORA > 4000 OR LDA > 0)
AND (TURN_UPDATABLE.AIRLINE_CODE IS NULL OR TURN_UPDATABLE.AIRLINE_CODE = ''
OR TURN_UPDATABLE.AIRLINE_CODE = '')
I am not really sure what you want. But maybe something like this:
SELECT RUNWAYS_UPDATABLE.*, TURN_UPDATABLE.*
FROM RUNWAYS_UPDATABLE
JOIN table_3
ON table_3.rwykey = runways_updatable.rwykey
LEFT JOIN TURN_UPDATABLE
ON RUNWAYS_UPDATABLE.RWYKEY = TURN_UPDATABLE.RWYKEY
WHERE RUNWAYS_UPDATABLE.ICAO = 'ICAO'
AND (RUNWAYS_UPDATABLE.TORA > 4000 OR LDA > 0)
AND (TURN_UPDATABLE.AIRLINE_CODE IS NULL OR TURN_UPDATABLE.AIRLINE_CODE = ''
OR TURN_UPDATABLE.AIRLINE_CODE = '')
For Postgres, query planner does not guarantee order of execution of join. To Guarantee one can use #Gajus solution but the problem arises if there are Where condition for inner join table's column(s). Either one would to require to carefully add the where clauses in the respective Join condition or otherwise it is better to use subquery the inner join part, and left join the output.
I'm having trouble creating a query which in my mind should be simple.
I have two tables (tblReviews and tblRating). Both these tables have a venueId and a userId.
I want to create a single query that will return the review and the rating using the same venueId and userId. is this possible or should I use two queries?
Thanks in advance
SELECT Rev.column_name, Rat.column_name
FROM dbo.tblReview AS Rev
FULL OUTER JOIN dbo.tblRating AS Rat
ON Rev.VenueId = Rat.VenueId
AND Rev.UserId = Rat.UserId;
If you want all for a specific user:
SELECT Rev.column_name, Rat.column_name
FROM dbo.tblReview AS Rev
FULL OUTER JOIN dbo.tblRating AS Rat
ON Rev.VenueId = Rat.VenueId
AND Rev.UserId = Rat.UserId
WHERE (Rev.UserId = #UserId OR Rat.UserId = #UserId);
If you want all for a specific venue:
SELECT Rev.column_name, Rat.column_name
FROM dbo.tblReview AS Rev
FULL OUTER JOIN dbo.tblRating AS Rat
ON Rev.VenueId = Rat.VenueId
AND Rev.UserId = Rat.UserId
WHERE (Rev.VenueId = #VenueId OR Rat.VenueId = #VenueId);
You can
Join both tables using these fields;
..or (SELECT first) UNION (SELECT second)
SELECT *
FROM tblReviews AS rev INNER JOIN
tblRating AS rat ON rev.venueid = rat.venueid AND rev.userid = rat.userid
This query returns the matching rows from each tables. You can use outer joins (LEFT OUTER JOIN, RIGHT OUTER JOIN, also FULL OUTER JOIN) if you want all records from first, second, or both table.
I don't know if you're asking this.
Try:
SELECT re.venueId, re.userId, re.review, ra.rating
FROM tblReviews re INNER JOIN tblRating ra
ON re.venueId = ra.venueId AND re.userId = ra.userId
I'm trying to create a moderately complex query with joins:
SELECT `history`.`id`,
`parts`.`type_id`,
`serialized_parts`.`serial`,
`history_actions`.`action`,
`history`.`date_added`
FROM `history_actions`, `history`
LEFT OUTER JOIN `parts` ON `parts`.`id` = `history`.`part_id`
LEFT OUTER JOIN `serialized_parts` ON `serialized_parts`.`parts_id` = `history`.`part_id`
WHERE `history_actions`.`id` = `history`.`action_id`
AND `history`.`unit_id` = '1'
ORDER BY `history`.`id` DESC
I'd like to replace `parts`.`type_id` in the SELECT statement with `part_list`.`name` where the relationship I need to enforce between the two tables is `part_list`.`id` = `parts`.`type_id`. Also I have to use joins because in some cases `history`.`part_id` may be NULL which obviously isn't a valid part id. How would I modify the query to do this?
Here is some sample date as requested:
history table:
(source: ianburris.com)
serialized_parts table:
(source: ianburris.com)
parts table:
(source: ianburris.com)
part_list table:
(source: ianburris.com)
And what I want to see is:
id name serial action date_added
4 Battery 567 added 2010-05-19 10:42:51
3 Antenna Board 345 added 2010-05-19 10:42:51
2 Main Board 123 added 2010-05-19 10:42:51
1 NULL NULL created 2010-05-19 10:42:51
This would at least be on the right track...
If you're looking to NOT show any parts with an invalid ID, simply change the LEFT JOINs to INNER JOINs (they will restrict NULL values)
SELECT `history`.`id`
, `parts`.`type_id`
, `part_list`.`name`
, `serialized_parts`.`serial`
, `history_actions`.`action`
, `history`.`date_added`
FROM `history_actions`
INNER JOIN `history` ON `history`.`action_id` = `history_actions`.`id`
LEFT JOIN `parts` ON `parts`.`id` = `history`.`part_id`
LEFT JOIN `serialized_parts` ON `serialized_parts`.`parts_id` = `history`.`part_id`
LEFT JOIN `part_list` ON `part_list`.`id` = `parts`.`type_id`
WHERE `history`.`unit_id` = '1'
ORDER BY `history`.`id` DESC
Boy, these backticks make my eyes hurt.
SELECT
h.id,
p.type_id,
pl.name,
sp.serial,
ha.action,
h.date_added
FROM
history h
INNER JOIN history_actions ha ON ha.id = h.action_id
LEFT JOIN parts p ON p.id = h.part_id
LEFT JOIN serialized_parts sp ON sp.parts_id = h.part_id
LEFT JOIN part_list pl ON pl.id = p.type_id
WHERE
h.unit_id = '1'
ORDER BY
history.id DESC