I have a grid that displays lines from a table. Now, I have these two requirements:
Show only the lines that contains values in the "hour" fields. The "hour" field is an array type.
Show the lines from a project and its subproject
My problem is this: to meet requirement #1, I need to use a select statement in my datasource since I cannot access array value using QueryBuildDataSource (this is a known limitation in Dynamics AX).
But to meet requirements #2 I need to have two "exists join", and this is not possible in Dynamics AX. For example the following code would not work:
select from table where
exists join tableChild where projectId = MyProjectId OR
exists join tableChild where parentProjectId = MyProjectId
How would someone address this issue?
From the select statement example you provided, it appears it may not be necessary to have two exist joins. A single exists join with the "OR" for the two possible conditions in its where clauses may be sufficient, of course, you should still have some relationship between table and tableChild for the join to make logical sense.
select from table
exists join tableChild
where (tableChild.projectId = MyProjectId || tableChild.parentProjectId = MyProjectId)
You can use array values in query ranges providing field IDs using fieldID2Ext function.
You can build view and apply confitions on top of it.
Related
I have a Customers table which contains the salesRepEmployeeNumber which is in the Employees table.
How do I do something like
SELECT *
FROM Customers
JOIN Employees
ON Customers.salesRepEmployeeNumber = Employees.employeeNumber
with icCube ETL ?
As pointed in another answer, you can add a table based in an SQL statement that would do the job. In case your original datasource is not able to do a join :
We've not yet an join transformation, added this in our todo list. On the meantime, what you can do is.
Create an Union Table with your two tables. This will create a new table with the columns of both tables. Put the small one, first as we're going to cache it later on.
Create a Javascript view, you might need to activate Javascript in your icCube.xml configuration. In this one you can cache the first table and use a bit of js to do the join. You can trigger the table change on a field being empty. Don't forget to put 'Table Row Ordering' to Keep Table Order.
hope it helps
No need to use the ETL.
With the designer, add a table with the + sign in the menu above DataSource. The next panel gives you the choice between reading data from an existing table or an sql query.
I'm working on a sqlite database and try to make a special request between two tables.
In the first table (table1 for example), i have two columns named "reference" and "ID". I want to search an ID in it, get it value in "reference" and display all informations from the table which have this value as name.
I try to find something on the internet but I didn't find an answer.
This is the request I made:
select * from (select Reference from table1 where Name='Value1')
It only give me the result of
select Reference from table1 where Name='Value1'
EDIT:
I want
select Reference from table1 where Name='Value1' => name of table
select * from name of table => show all elements
I'm new in sqlite but I hope you can help me.
Thank you by advance
Matt
If I understand your question correctly, I don't think there's a way to do it in sql completely (or at least not in a portable way). I'd recommend one of 3 solutions:
Do exactly what you want, but do some processing in Python. That means query your master table, then construct new query based on each of the rows returned.
If you have many tables, possibly changing dynamically - it may be a good idea to rethink your database design. Maybe you can move some of the changing table names into a new column and put your data in one table?
If you have only a few tables available as the Reference and they never change, you could join all the possible tables, like:
SELECT ... FROM table1
LEFT JOIN table2
ON table1.id = table2.id AND table1.Reference = "table2"
LEFT JOIN table3 ...
But you may need to explain it all a bit better...
I would like to know how to use asp.net vb to create a gridview that has one query be the column headers then use those column headers to populate the table. I have accomplished this in asp classic but would like to know how to to it in .net. The following are my queries that accomplish this in asp classic.
Select DOA,GroupName From Groups Where Doa is not null Order by zDOA
I use that query to populate the top of my table, then use this to get the users and their groups.
SELECT DISTINCT TM.PersonID, GroupMembers.FullNm, TM.zUpdatedOn, Location.LocationName FROM GroupMembers INNER JOIN TM ON GroupMembers.PersonID = TM.PersonID Inner JOin Location ON Location.LocationID = GroupMembers.LocationID INNER JOIN Groups ON GroupMembers.GroupsID= Groups.ID WHERE (GroupMembers.zIsActive = 1) AND GroupMembers.LocationID = "&LocationID&" AND Groups.DOA IS NOT NULL order by FullNm
That query gets people's name, their location(from StringQuery) and then finds out which groups they are in. When it cycles through which groups they are in, it compares their groups to all of the groups. When they match I put a check box in the correct spot. I have attached a image of this. The RED is from the first Query and the BLUE is from the second query. My question is how to replicate this in .net. I am unable to put the first query as the columns and fill in the rest with the second query.
![Example]
The answer is to use the sql pivot function. http://www.codeproject.com/Tips/500811/Simple-Way-To-Use-Pivot-In-SQL-Query
I have to update one table field as another field of different table in sql. There are two tables, create_account and Trans_Details. I have to update amount field of create_account table and set it into current_balance of Trans_Details table. How can I join these two tables? please write a query for this.
You can utilize the sub queries to do this...
Example:
I do not know what kind of data base r u using i am just giving a pseudo code..
UPDATE create_account SET (amount) = ( SELECT current_balance FROM Trans_Details
WHERE filter = some_value) WHERE filter = some_value.
I have added the where clause in the query, please ignore if u want to update the entire row in the column amount.
I have recently stumbled upon a problem with selecting relationship details from a 1 table and inserting into another table, i hope someone can help.
I have a table structure as follows:
ID (PK) Name ParentID<br>
1 Myname 0<br>
2 nametwo 1<br>
3 namethree 2
e.g
This is the table i need to select from and get all the relationship data. As there could be unlimited number of sub links (is there a function i can create for this to create the loop ?)
Then once i have all the data i need to insert into another table and the ID's will now have to change as the id's must go in order (e.g. i cannot have id "2" be a sub of 3 for example), i am hoping i can use the same function for selecting to do the inserting.
If you are using SQL Server 2005 or above, you may use recursive queries to get your information. Here is an example:
With tree (id, Name, ParentID, [level])
As (
Select id, Name, ParentID, 1
From [myTable]
Where ParentID = 0
Union All
Select child.id
,child.Name
,child.ParentID
,parent.[level] + 1 As [level]
From [myTable] As [child]
Inner Join [tree] As [parent]
On [child].ParentID = [parent].id)
Select * From [tree];
This query will return the row requested by the first portion (Where ParentID = 0) and all sub-rows recursively. Does this help you?
I'm not sure I understand what you want to have happen with your insert. Can you provide more information in terms of the expected result when you are done?
Good luck!
For the retrieval part, you can take a look at Common Table Expression. This feature can provide recursive operation using SQL.
For the insertion part, you can use the CTE above to regenerate the ID, and insert accordingly.
I hope this URL helps Self-Joins in SQL
This is the problem of finding the transitive closure of a graph in sql. SQL does not support this directly, which leaves you with three common strategies:
use a vendor specific SQL extension
store the Materialized Path from the root to the given node in each row
store the Nested Sets, that is the interval covered by the subtree rooted at a given node when nodes are labeled depth first
The first option is straightforward, and if you don't need database portability is probably the best. The second and third options have the advantage of being plain SQL, but require maintaining some de-normalized state. Updating a table that uses materialized paths is simple, but for fast queries your database must support indexes for prefix queries on string values. Nested sets avoid needing any string indexing features, but can require updating a lot of rows as you insert or remove nodes.
If you're fine with always using MSSQL, I'd use the vendor specific option Adrian mentioned.