Please go thourgh Attached Image where i descirbed my scenario:
I want SQL Join query.
Have a look at something like
SELECT *
FROM Orders o
WHERE EXISTS (
SELECT 1
FROM OrderBooks ob INNER JOIN
Books b ON ob.BookID = b.BookID
WHERE o.OrderID = ob.OrderID
AND b.IsBook = #IsBook
)
The query will return all orders based on the given criteria.
So, what it does is, when #IsBook = 1 it will return all Orders where there exists 1 or more entries linked to this order that are Books. And if #IsBook = 0 it will return all Orders where there exists 1 or more entries linked to this order that are not Books.
Inner join is a method that is used to combine two or more tables together on base of common field from both tables. the both keys must be of same type and of length in regardless of name.
here is an example,
Table1
id Name Sex
1 Akash Male
2 Kedar Male
similarly another table
Table2
id Address Number
1 Nadipur 18281794
2 Pokhara 54689712
Now we can perform inner join operation using the following Sql statements
select A.id, A.Name, B.Address, B.Number from Table1 A
INNER JOIN Table2 B
ON A.id = B.id
Now the above query gives one to one relation details.
Related
I'm trying to fetch certain data by using a column that exists in all 3 tables, I have three tables
[Txn].[TxnPaymentResponse]
[Txn].[Txn]
[Txn].[TxnLineItem]
Right now if I run the query, I'm able to get the correct data only userID.
But I want to grab another piece of information (suppose that call column X) from the 3rd table (TxnLineItem). That column doesn't exist in the first 2 tables. In this scenario how could I perform inner join and show that piece of info in the query?
DECLARE #CompletedTransactionSince DATETIME2(7) = '2022-09-13 00:00:00.000000'
SELECT DISTINCT
t.UserID
FROM
[Txn].[Txn] T WITH(NOLOCK)
INNER JOIN
[Txn].[TxnPaymentResponse] TPR WITH(NOLOCK) ON T.[TxnID] = TPR.[TxnID]
WHERE
TPR.[PaymentResponseType] = 'FINAL'
AND TPR.[AuthorizedAmount] > CONVERT(DECIMAL(9,3), 0)
AND (#CompletedTransactionSince IS NULL OR
T.[CreatedOn] > #CompletedTransactionSince)
Results from my query:
UserID
C1671FDA-70A8-4C07-BBDF-ACD06ADD145F
Table 3:
TxnID
StandardProductCategory
6FE0D0D0-9959-41AA-9BF0-00000003DED8
Carwash
D1B0EA51-C476-488C-A140-0000C1C7D099
General
Suppose I'm doing inner join like
INNER JOIN
[Txn].[TxnLineItem] TXL WITH(NOLOCK) ON T.[TxnID] = [Txn].[TxnID],
But my I want to grab the X column that has the same transactionID. I want to display UserID that has a Carwash only. Not sure if it's possible to write another clause with an inner join.
As per "I want to display UserID that has a Carwash only", you need to exclude records.
Just add these EXISTS and NOT EXISTS clauses at the end of to query.
EXISTS part is filter users that has CarWash.
NOT EXISTS part is exclude users that has StandardProduct Category records other than Car Wash
......
AND (#CompletedTransactionSince IS NULL OR
T.[CreatedOn] > #CompletedTransactionSince)
AND EXISTS ( SELECT 1 FROM [Txn].[TxnLineItem] TXL
WHERE T.[TxnID] = [Txn].[TxnID]
AND TXL.StandardProductCategory='Carwash')
AND NOT EXISTS( SELECT 1 FROM [Txn].[TxnLineItem] TXL
WHERE T.[TxnID] = [Txn].[TxnID]
AND TXL.StandardProductCategory=<>'Carwash')
I'm joining these three tables, but the same information gets displayed 3 times ... Any idea how to have only the unique rows to be displayed, as determined by unique shipment id's?
SELECT S.SHIPMENT_ID, S.CREATION_DATE, S.BUSINESS_ID, B.BUS_ID, S.SHIPMENT_STATUS, S.BUSINESS_NAME, S.SHIPMENT_MODES, S.CUSTOMER_NAME
FROM "SHIPMENT" S
INNER JOIN "BUSINESS" B ON S.BUSINESS_ID=B.BUS_ID
INNER JOIN "SHIPMENT_GROUP" SG ON S.SHIPMENT_ID=SG.SHIPMENT_ID
INNER JOIN "DATA_GROUP" DG ON DG.ID=SG.GROUP_ID
try select distinct
SELECT DISTINCT column1, column2, ...
FROM table_name;
w3schools
You are selecting rows from the first table only, so this suggests that you are using the joins for filtering.
If so, you can rewrite this with exists, which will avoid duplicates if there are multiple matches. Starting from your existing query, the logic would be:
select s.*
from shipment s
where
exists (
select 1
from business b
where b.bus_id = s.business_id
) and exists (
select 1
from shipment_group sg
inner join data_group dg on dg.id = sg.group_id
where sg.shipment_id = s.shipment_id
)
I have two tables, one for all the foods which contains food id, default name and other foods values.
Another table is for the food name translations which contains food id, language id, translation.
What i want to do is join between these tables by the food id to get the translation for food id = 5 for example and language id = 1 which is Spanish for example. and i do it by:
SELECT *
FROM Foods
INNER JOIN FoodNameTranslations USING(Food_ID)
WHERE Food_ID = 5
AND Language_ID = 1
Now what if the the 'FoodNameTranslations' table doesn't have a translation for Food_ID 5 and Language 1?
then i want to simply get the food row with food id = 5 from the 'Foods' table (that contains the default name).
How can i make one query that does this? thanks!
You would do a LEFT JOIN and put the language ID into the join condition.
SELECT
COALESCE(t.TranslatedName, f.DefaultName) FoodName
FROM
Foods f
LEFT JOIN FoodNameTranslations t ON t.Food_ID = f.Food_ID AND t.Language_ID = 1
WHERE
f.Food_ID = 5
You cando do this by changing the JOIN condition:
INNER JOIN gets all records that are common between both tables based on the supplied ON clause.
LEFT JOIN gets all records from the LEFT linked and the related record from the right table ,but if you have selected some columns from the RIGHT table, if there is no related records, these columns will contain NULL.
RIGHT JOIN is like the above but gets all records in the RIGHT table.
FULL JOIN gets all records from both tables and puts NULL in the columns where related records do not exist in the opposite table.
Try using LEFT JOIN instead INNER JOIN, you query will be like this:
SELECT *
FROM Foods
LEFT JOIN FoodNameTranslations USING(Food_ID)
WHERE Food_ID = 5
AND Language_ID = 1
I have two tables named document and levelnew
Table1: document:
document(mno,dept,step1_userid,step2_userid,step3_userid)
select * from document where step3_userid is not null;
Table2: levelnew:
levelnew(dept,level2_id,level3_id)
select dept from levelnew where level3_id='40016022';
Can i join the tables and get answer as single result?
Make a join on Dept.
select A.*,B.dept from document A inner join levelnew B On
A.dept = B.dept
Where step3_userid is not null and level3_id='40016022'
Below query will give the required result :-
select
D.*,L.dept
from
document D
inner join
levelnew L on D.dept=L.dept
where L.level3_id='40016022' AND D.step3_userid is not null;
I want to pull back results from one table that match ALL specified values where the specified values are in another table. I can do it like this:
SELECT * FROM Contacts
WHERE
EXISTS (SELECT 1 FROM dbo.ContactClassifications WHERE ContactID = Contacts.ID AND ClassificationID = '8C62E5DE-00FC-4994-8127-000B02E10DA5')
AND EXISTS (SELECT 1 FROM dbo.ContactClassifications WHERE ContactID = Contacts.ID AND ClassificationID = 'D2E90AA0-AC93-4406-AF93-0020009A34BA')
AND EXISTS etc...
However that falls over when I get up to about 40 EXISTS clauses. The error message is "The query processor ran out of internal resources and could not produce a query plan. This is a rare event and only expected for extremely complex queries or queries that reference a very large number of tables or partitions. Please simplify the query."
The gist of this is to
Select all contacts with any GUID from the IN statement
Use a DISTINCT COUNT to get a count for each contactid on matching GUID's
Use the HAVING to retain only those contacts that equal the amount of matching GUID's you've put into the IN statement
SQL Statement
SELECT *
FROM dbo.Contacts c
INNER JOIN (
SELECT c.ID
FROM dbo.Contacts c
INNER JOIN dbo.ContactClassifications cc ON c.ID = cc.ContactID
WHERE cc.ClassificationID IN ('..', '..', 38 other GUIDS)
GROUP BY
c.ID
HAVING COUNT(DISTINCT cc.ClassificationID) = 40
) cc ON cc.ID = c.ID
Test script at data.stackexchange
One solution is to demand that no classification exists without a matching contact. That's a double negation:
select *
from contacts c
where not exists
(
select *
from ContactClassifications cc
where not exists
(
select *
from ContactClassifications cc2
where cc2.ContactID = c.ID
and cc2.ClassificationID = cc.ClassificationID
)
)
This type of problem is known as relational division.
SELECT c.*
FROM Contacts c
INNER JOIN
(cc.ContactID, COUNT(DISTINCT cc.ClassificationID) as num_class
FROM ContactClassifications
WHERE ClassificationID IN (....)
GROUP BY cc.ContactID
) b ON c.ID = b.ContactID
WHERE b.num_class = [number of distinct values - how many different values you put in "IN"]
If you run SQLServer 2005 and higher, you can do pretty much the same with CROSS APPLY, supposedly more efficiently