join Questions
3
Solved
I've got the following query:
select distinct a.id, a.name
from Employee a
join Dependencies b on a.id = b.eid
where not exists
(
select *
from Dependencies d
where b.id = d.id
and d.name...
2
Solved
How can merge 3 cycle in one script. And export in one table
server
Name
email
Cluster
TcpTestSucceeded
PingSucceeded
RemoteAddress
Cell 1
Cell 22
Cell 11
Cell 2
Cell 21
Cell 13
Cell 27
C...
Reflectance asked 14/12, 2022 at 17:46
2
Solved
I'm trying to join the NAME and PHOTO from USERS table to the TRANSACTIONS table based on who is the payer or payee. It keeps telling me can't find the table this -- What am I doing wrong?
SELECT ...
6
For a few years, I often have a need to combine lines of (sorted) text with a matching first field, and I never found an elegant (i.e. one-liner unix command line) way to do it. What I want is simi...
Photochromy asked 13/10, 2017 at 16:51
12
Solved
I have 3 CSV files. Each has the first column as the (string) names of people, while all the other columns in each dataframe are attributes of that person.
How can I "join" together all three CSV...
5
Solved
I have 2 tables/entities with no association.
I can go for cross joins in JPA
FROM A as a, B as b WHERE b.col1=a.col1
How Can I perform a left-join?
I want all values from A and fill them up wi...
1
I need to do a fuzzy join between two large dataset (assuming 30Gb for each dataset) based on the similarity of two columns of string. For example:
Table 1:
Key1 |Value1
-------------
1 |qsdm f...
Susian asked 25/2, 2016 at 9:24
6
Solved
Let T1 and T2 are DataTables with following fields
T1(CustID, ColX, ColY)
T2(CustID, ColZ)
I need the joint table
TJ (CustID, ColX, ColY, ColZ)
How this can be done in C# code in a simple wa...
Goldwin asked 20/3, 2009 at 11:29
12
Solved
I want to join two tables, but only get 1 record of table2 per record on table1
For example:
SELECT c.id, c.title, p.id AS product_id, p.title
FROM categories AS c
JOIN products AS p ON c.id = p....
4
Solved
I have two collections
User
{
"_id" : ObjectId("584aac38686860d502929b8b"),
"name" : "John"
}
Role
{
"_id" : ObjectId("584aaca6686860d502929b8d"),
"role" : "Admin",
"userId" : "584aac3868...
Impresa asked 12/12, 2016 at 3:7
6
Solved
Can sombody Explains me about joins?
Inner join selects common data based on where condition.
Left outer join selects all data from left irrespective of common but takes common data from right ta...
Reconnaissance asked 13/4, 2013 at 11:33
7
Solved
Is it always a best practice to use -
Select E.Id,D.DeptName from Employee E join Dept D on E.DeptId=D.Id
instead of -
Select Employee.Id,Dept.DeptName from Employee join Dept on Employee.DeptI...
3
Solved
If I have a table mytable and a list
set vals = (1,2,3,4);
and I want to cross-join the table with the list (getting a new table which has 4 time as many rows as the original table and an extra ...
5
Solved
Is there any difference in terms of performance between these two versions of the same query?
--Version 1
SELECT p.Name, s.OrderQty
FROM Product p
INNER JOIN SalesOrderDetail s on p.ProductID = s....
Muzzleloader asked 20/7, 2012 at 7:3
2
Solved
I am making a query in Spark in Databricks, and I have a problema when I am trying to make a join between two dataframes. The two dataframes that I have are the next ones:
"names_df" which has 2 ...
Copyist asked 7/9, 2016 at 7:57
8
Solved
Is it possible to JOIN rows from two separate postgres databases?
I am working with system with couple databases in one server and sometimes I really need such a feature.
Carthage asked 13/1, 2011 at 10:12
4
I use fork/join in Oozie, in order to parallel some sub-workflow actions.
My workflow.xml looks like this:
<workflow-app name="myName" xmlns="uri:oozie:workflow:0.5"
<start to="fork1"/>
&...
Howbeit asked 8/7, 2015 at 12:13
3
Solved
I'm writing a application using a database backend, but I need to find out all the column names and the table they belong to via SQL. I know you can query sys.columns, sys.tables, and sys.databases...
Twotime asked 17/6, 2016 at 10:58
12
Solved
Most SQL dialects accept both the following queries:
SELECT a.foo, b.foo
FROM a, b
WHERE a.x = b.x
SELECT a.foo, b.foo
FROM a
LEFT JOIN b ON a.x = b.x
Now obviously when you need an outer join,...
24
How to perform left outer join in C# LINQ to objects without using join-on-equals-into clauses? Is there any way to do that with where clause?
Correct problem:
For inner join is easy and I have a s...
3
Solved
I have two tables I want to join.
I want all of the categories in the categories table and also all of the categories subscribed to by a user in the category_subscriptions table.
essentially this...
Refine asked 2/8, 2009 at 21:31
1
Solved
I have two CSV files:
CSV_1:
Name,Age,
John,20
Amy,25
Joe,30
CSV_2:
Name,Address
JohnDoe,123 street
AmyDoe,456 street
JoeSmith,789 drive
Is there a way to join them together in Powershell u...
Cosmos asked 14/9, 2022 at 5:37
3
Solved
I would like to add a prefix to all columns that result from a left join.
left_join() has the possibility to add a suffix when names are identical between the two tables being joined. But, it doe...
Batey asked 24/10, 2016 at 20:1
3
3
Solved
I am working with legacy database and have a many-to-many association with a join-table that I have resolved to a large extent as the mappings are working fine. But there is an additional column an...
Blondy asked 7/11, 2012 at 1:24
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