I have 3 tables and I want to know how can I do a triple join with this type of setup if at all?
First Table: LOCATIONS_TABLE
locationID
websiteID
locationCity
locationState
locationCountry
locationURL
Second Table: PREF_TABLE
pref_ID
Pref_LocationID
Pref_WebsiteID
Pref_SavedTitle
Third Table: WEBSITECATEGORY_TABLE
wbcatID
websiteID
WBLinkCategoryParentID
WBLinkTitle
WBLinkURL
the 2nd table is where the user has a store preference with a Pref_SavedTitle for their Locations they have saved for later reference.
The Current SQL Statement I have which only does a double inner join is...
SELECT
LOCATIONS_TABLE.LocationWebsiteID,
LOCATIONS_TABLE.locationCity,
LOCATIONS_TABLE.locationState,
LOCATIONS_TABLE.locationCountry,
LOCATIONS_TABLE.locationURL,
PREF_TABLE.Pref_SavedTitle
FROM PREF_TABLE INNER JOIN LOCATIONS_TABLE
ON PREF_TABLE.Pref_LocationID = LOCATIONS_TABLE.LocationID
WHERE PREF_TABLE.Pref_SavedTitle = 'AlabamaPREF'
This returns sample data of...
LocationWebsiteID = 2
locationCity = Mobile
locationState = Alabama
locationCountry = United States
locationURL = alabama.bmv.org
Pref_SavedTitle - AlabamaPREF
The 3rd table has the sample data of...
wbcatID = 1
websiteID = 2
WBLinkCategoryParentID = 0
WBLinkTitle = Alabama Resources
WBLinkURL = /alabama-resources
This does exactly what it needs to do which is returns me all of the LOCATION_TABLE items that equal the LocationID that was stored previously in the PREF_TABLE.
However I have a 3rd table that I need to add to this equation (Which is the Third Table) listed above. I need to be able to link the Third Table on the websiteID somehow so that it knows the WBLinkTitle and WBLinkURL are associated with that specific websiteID
On the final output... I need to be able to pull the results for the columns...
LOCATIONS_TABLE.websiteID,
LOCATIONS_TABLE.locationURL,
WEBSITECATEGORY_TABLE.WBLinkTitle,
WEBSITECATEGORY_TABLE.WBLinkURL
which based off my sample data would be...
websiteID = 2
locationURL = alabama.dmv.org
WBLinkTitle = Alabama Resources
WBLinkURL = /alabama-resources
SQLFIDDLE EXAMPLE
UPDATED v-1
I've updated the answer according to your comment (now the 3rd table is inner-joined to PREF_TABLE and additional condition was added to the first join: AND PREF_TABLE.Pref_WebsiteID = LOCATIONS_TABLE.LocationWebsiteID to prevent all-locations loading):
SELECT
LOCATIONS_TABLE.LocationWebsiteID,
LOCATIONS_TABLE.locationCity,
LOCATIONS_TABLE.locationState,
LOCATIONS_TABLE.locationCountry,
LOCATIONS_TABLE.locationURL,
PREF_TABLE.Pref_SavedTitle,
WEBSITECATEGORY_TABLE.WBLinkTitle,
WEBSITECATEGORY_TABLE.WBLinkURL
FROM
PREF_TABLE
INNER JOIN LOCATIONS_TABLE
ON PREF_TABLE.Pref_LocationID = LOCATIONS_TABLE.LocationID
AND PREF_TABLE.Pref_WebsiteID = LOCATIONS_TABLE.LocationWebsiteID
INNER JOIN WEBSITECATEGORY_TABLE
ON WEBSITECATEGORY_TABLE.websiteID = PREF_TABLE.Pref_WebsiteID
WHERE
PREF_TABLE.Pref_SavedTitle = 'AlabamaPREF'
Related
I am trying to join data based on the following scenario.
Let's say there are two businesses. Business 1 has one field for customer data, business 2 has two fields. I need to join to multiple other tables using these customer fields.
I would like to create a join that joins on just field 1 for business 1, but field 1 AND field 2 for business 2. In other words, there is a more granular identifier available for business 2, but it is still valid to join on just field 1 for business 1 as well. It also needs to function like an inner join, in that we are only preserving the relevant data that match these conditions.
The code would look something like this for business 1:
FROM customer_data a
INNER JOIN marketing_data b
ON a.member_number = b.member_number
WHERE business_number = 1
And something like this for business 2:
FROM customer_data a
INNER JOIN marketing_data b
ON a.member_number = b.member_number
AND a.sub_member_number = b.sub_member_number
WHERE business_number = 2
I am hoping to extract both sets of data in one join statement. Also, just in case it helps, I am using the Snowflake platform to write my queries.
Following should work for both the cases.
FROM customer_data a
INNER JOIN marketing_data b ON a.member_number = b.member_number
WHERE (
a.sub_member_number = b.sub_member_number
AND business_number = 2
)
OR business_number = 1
You can put the conditions in the ON clause like this:
FROM customer_data cd INNER JOIN
marketing_data md
ON cd.member_number = md.member_number AND
( cd.business_number <> 2 OR
cd.sub_member_number = md.sub_member_number
)
Note: this generalizes beyond just businesses 1 and 2, with the special condition only applying to 2. The first condition can be = 1 if you want to be more specific.
Also note that this introduces meaningful table aliases rather than arbitrary letters. This makes queries much easier to understand.
Here are my tables,
I'm trying to fetch the list of free bets with the details if the user has placed his bet or not. This is the query i have written to fetch the details for the same,
select DISTINCT tbl_CreateFreeBet.FreeBetID,
tbl_CreateFreeBet.FreeBetDescription,
tbl_CreateFreeBet.FreeBetAmount,
tbl_CreateFreeBet.TournamentID,
tbl_CreateFreeBet.MatchID,
tbl_UserFreeBets.UserForYes,
tbl_UserFreeBets.UserForNo,
tbl_UserFreeBets.UserForNoBets
from tbl_CreateFreeBet left outer join tbl_UserFreeBets
on tbl_CreateFreeBet.MatchID = 1 and
tbl_CreateFreeBet.MatchID = tbl_UserFreeBets.MatchID and
tbl_CreateFreeBet.FreeBetID = tbl_UserFreeBets.FreeBetID and
tbl_CreateFreeBet.TournamentID = tbl_UserFreeBets.TournamentID and
(tbl_UserFreeBets.UserForYes = 'User2' or tbl_UserFreeBets.UserForNo =
'User2')
This is working fine, when there is a data in tbl_CreateFreeBet table for the MatchID. But if there is no data, then this query is not returning the expected result.
For example: With tbl_CreateFreeBet.MatchID = 1, I need to get all the free bets of matchID = 1, with the details of the passed in user, if has bet on 'yes' or 'no'. This comes up fine, as there is data for MatchId = 1 in tbl_CreateFreeBet.
But, it fails, when the tbl_CreateFreeBet.MatchID = 2 input is passed. Here there is no free bet created for the MatchID = 2. But still it returns me the result for MatchID=1.
Please share the query if one is aware of what changes need to be done for my query. Thank you.
Conditions on the first table in a LEFT JOIN should be in the WHERE clause. I think you intend this logic:
select cfb.FreeBetID, cfb.FreeBetDescription, cfb.FreeBetAmount,
cfb.TournamentID, cfb.MatchID,
ufb.UserForYes, ufb.UserForNo, ufb.UserForNoBets
from tbl_CreateFreeBet cfb left outer join
tbl_UserFreeBets ufb
on cfb.MatchID = ufb.MatchID and
cfb.FreeBetID = ufb.FreeBetID and
cfb.TournamentID = ufb.TournamentID and
(ufb.UserForYes = 'User2' or ufb.UserForNo = 'User2')
where cfb.MatchId = 1
i am trying to get non matching records from two table by comparing some columns which are common in both tables.i am using sql query to get the result. my first table is snd_marketvisits this table have properties like id ,pjpCode , section code, popCode .pop_name and landmark similary my 2nd table have pjpcode , section code, popcode popname are common and there are some other fields.i want to get the names of the pop which are not in second table but present in snd_marketvisit table by comparing popcode, sectioncode and pjpcode in both tables.
SELECT *
FROM snd_marketvisits sm
LEFT JOIN snd_marketvisit_pops sp ON
sm.distributorCode = sp.distributor AND
sm.pjpCode = sp.pjp AND
sm.sectionCode = sp.sectionCode AND
sm.popCode = sp.popCode
WHERE
sm.sectionCode = '00016' AND
sm.pjpCode = '0001' AND
sm.distributorCode = '00190A'
It depends on the database, as far as I know, but if you ask for NULL inside your yoined fields you should get only the rows without a match.
SELECT *
FROM snd_marketvisits sm
LEFT JOIN snd_marketvisit_pops sp ON
sm.distributorCode = sp.distributor AND
sm.pjpCode = sp.pjp AND
sm.sectionCode = sp.sectionCode AND
sm.popCode = sp.popCode
WHERE
sm.sectionCode = '00016' AND
sm.pjpCode = '0001' AND
sm.distributorCode = '00190A'
AND sp.distributor IS NULL
Trying to return only the 1st supplier code and have all other fields unaffected.
`Select
Container.Part_Key,
Part.Part_No,
Part.Name,
Part.Revision,
Container.Quantity,
Container.Container_Status,
OP.Operation_No,
Opp.Operation_Code,
Part.Part_Status,
Supplier.Supplier_Code
From Part_v_Container as Container
Join Part_v_Part as Part
ON Part.Part_Key = Container.Part_Key
Join Part_v_Part_Operation as Op
On Op.Part_Operation_Key = Container.Part_Operation_Key
Join Part_v_Operation as OPP
On OPP.Operation_Key = OP.Operation_Key
Join part_v_approved_supplier as Approved
On Approved.part_key = container.part_key
Join common_v_Supplier as Supplier
On Supplier.supplier_no = Approved.Supplier_No
Where Container.Active = '1'
group by container.part_key`
There will be duplicate part numbers, revisions, etc. Not worried about that. I just want the part no to list only one approved supplier to the far right, even though for any given part, there are multiple approved suppliers listed in the database.
Furthermore, the order the database lists the approved suppliers does not matter.
Thanks!
Add a sub query in your select list
( select top 1 supplier.supplier_code
From supplier
Where Supplier.supplier_no = Approved.Supplier_No order by Supplier.supplier_no) as supplier code
This can be the last field in the select list
You could add An appropriate order by.
This would work in SQL Server
I am having a bit of trouble, probably from my understanding of SQL. Here is the SQL I am currently using:
CREATE TEMPORARY TABLE Temp
(
sPropertyCode VARCHAR(9),
sDataDate DATE,
PRIMARY KEY (sPropertyCode)
);
INSERT IGNORE Temp (sPropertyCode, sDataDate)
SELECT sPropertyCode, sDataDate
FROM tasks as t, task_data AS d
WHERE t.iTaskId = d.iTaskId
AND iRemoved = 1
AND sDataType = 'sAgencyAgreementDate'
AND iBusinessStreamId = 9;
SELECT t.sPropertyCode, sDataDate, SFirstSeen, sTaskType
FROM tasks AS t, temp AS a
WHERE iRemoved = 1
AND iBusinessStreamId = 9
AND sTaskType IN ('RF', 'IF', 'CM')
AND t.sPropertyCode = a.sPropertyCode
ORDER BY sPropertyCode, sFirstSeen;
DROP TABLE Temp;
So the references 'RF', 'IF' and 'CM' are tasks that we receive. Each propertycode can touch each of these tasks once, and only once. I would like to show the date that each one of these was touched by the propertycode. It is working at the moment but it is showing it in three columns with the tasks types in one column. I would like each task to show in a seperate column with the date it was first seen in its own corresponding column.
So from the picture below is how it is currently laid out with the code above.
And here is how I would like it to look, instead of the tasks showing down the side, I would like them to show accross in columns with their own specific dates
Thank you in advance :)
SELECT t.sPropertyCode, sDataDate, SFirstSeen, a1.sTaskType, a2.sTaskType, a3.sTaskType
FROM tasks AS t
INNER JOIN temp AS a1 on t.sPropertyCode = a1.sPropertyCode and a1.sTaskType = 'RF'
INNER JOIN temp as a2 on t.sPropertyCode = a2.sPropertyCode and a2.sTaskType = 'IF'
INNER JOIN temp as a3 on t.sPropertyCode = a3.sPropertyCode and a3.sTaskType = 'CM'
WHERE iRemoved = 1 AND iBusinessStreamId = 9
ORDER BY sPropertyCode, sFirstSeen;
You can also user outer join if not always have all 3 tast type.
What is the difference in meaning between the CM,IF and RF columns for any row in your 5-col table ? They're always the very same value in the example you listed.