I have two tables.
TableA
Id
Column 1
Column 2
TableB (n-1 mapping with TableA)
Column 1
Column 2
fkToTableAonIdentity
and my query is
DECLARE #Offset = 0,
DECLARE #pageSize = 10
SELECT
A.column1, B.Column1
FROM
TableA AS A
LEFT JOIN
TABLEB AS TABLE B
ORDER BY
B.Column2 DESC
OFFSET #Offset ROWS
FETCH NEXT #PageSize ROWS ONLY
I was trying to fetch 10 rows from tableA joining data for tableB
but the query will only return exact 10 rows from the set created by left join, but I needed 10 rows of data from table A, so in set of left join number of rows may vary for each record in TableA.
How can I get the desired result?
Update:
I am using the above query in my stored procedure where #pageSize will be a parameter to the stored procedure.
Use following syntax:
SELECT * FROM
(SELECT TOP 10 * FROM Table1) ST1
JOIN Table2 ON ST1.Id=Table2.FkToT1
I expect your query will look as following one:
SELECT ST1.Col1, T2.Col1 FROM
(
SELECT * FROM Table1
ORDER BY Col1
OFFSET #offset ROWS
FETCH NEXT #page ROWS ONLY
) ST1
JOIN Table2 T2 ON ST1.Id=T2.FkToT1
I have a SQL Server query for an inner join...
SELECT *
FROM tableA
INNER JOIN tableB on tableA.my_id = tableB.my_id
How would I find all the records that did NOT match in this join?
You can use a FULL JOIN to combine the two tables, then use a WHERE clause to filter the results down to only non-matching rows by checking for a NULL in each tables primary key value.
Full outer join All rows in all joined tables are included, whether they are matched or not.
SELECT a.pk, b.pk
FROM tableA a
FULL JOIN tableB b ON a.pk=b.fk
WHERE
a.pk IS NULL
OR b.pk IS NULL
SELECT A2.* FROM TableA A2
WHERE A2.my_id NOT IN
(Select tableA.my_id FROM
tableA
inner join
tableB
on tableA.my_id = tableB.my_id)
you could similarly do the above starting SELECT B2.* FROM TableB B2, in order to separately query unmatched records in Table B
if you want all records in one table you could UNION ALL the two queries, depending on the table field structures being the same or how you specify the fields you select - what are you doing with the data?
SELECT * FROM tableA where my_id NOT IN (SELECT my_id from tableB)
UNION ALL
SELECT * FROM tableB where my_id NOT IN (SELECT my_id from tableA)
I have 2 tables and want to compare them and modify tableA (set NameMod = 1) if it has different rows.
To compare tables I use:
select Id, Name from tableB
except
select Id, Name from tableA
And then I want to modify tableA:
update tableA Set NameMod = 1
where exists (
select Id, Name from tableB
except
select Id, Name from tableA
)
But I can only use EXISTS before the sub-query and in this case it updates all elements in table not different rows.
Could you try this:
MERGE TableA AS [Target]
USING TableB AS [Source]
ON [Target].[ID] = [Source].[ID]
AND [Target].[Name ] = [Source].[Name]
WHEN NOT MATCHED BY TARGET
THEN UPDATE SET NameMod = 1;
It is using the MERGE clause.
If you do not like the clause, you can use CTE like this:
;WITH IdsForUpdate ([id]) AS
(
SELECT DISTINCT Id
FROM
(
select Id, Name from tableB
except
select Id, Name from tableA
) DS([id], [name])
)
update tableA
Set NameMod = 1
FROM tableA A
INNER JOIN IdsForUpdate B
ON A.[id] = B.[id];
I need a query that returns rows from table A if value X in table A is not the same as the sum of value Y from corresponding row(s) in table B. The issue is that there may or may not be rows in table B that correspond to the rows in table A, but if there no rows in table B, then the rows from table A should still be returned (because there is not a matching value in table B.) So it is like a LEFT OUTER join scenario, but the extra complication of having a comparison as an additional selection criteria.
I have a query that does the opposite, ie. returns rows if the value in table A is the same as the value of row(s) in table B, but sadly this isn't what I need!
SELECT TableA.id, TableA.bdate
FROM TableA
LEFT JOIN TableB ON TableB.ID = TableA.id
WHERE TableA.select_field = 408214
AND TableA.planned_volume =
(select sum(actual_volume)
from
TableB
where TableB.id = TableA.id)
ORDER BY TableA.id
Any help greatly appreciated.
How about something like this:
SELECT TableA.Id, TableA.bdate
FROM TableA
LEFT JOIN
(
SELECT Id, SUM(actual_volume) AS b_volume
FROM TableB
GROUP BY Id
) AS TableBGrouping
ON TableBGrouping.Id= TableA.Id AND TableA.planned_volume <> b_volume
ORDER BY TableA.Id
WITH TotalVolumes
AS
(
SELECT id, SUM(actual_volume) AS total_volume
FROM TableB
GROUP
BY id
)
SELECT id, bdate, planned_volume
FROM TableA
EXCEPT
SELECT A.id, A.bdate, T.total_volume
FROM TableA AS A
JOIN TotalVolumes AS T
ON A.id = T.id;
SELECT TableA.id, TableA.bdate
FROM TableA
LEFT JOIN TableB ON TableB.ID = TableA.id
AND TableA.planned_volume <>
(select sum(actual_volume)
from
TableB
where TableB.id = TableA.id)
ORDER BY TableA.id
I've got two tables:
TableA
------
ID,
Name
TableB
------
ID,
SomeColumn,
TableA_ID (FK for TableA)
The relationship is one row of TableA - many of TableB.
Now, I want to see a result like this:
ID Name SomeColumn
1. ABC X, Y, Z (these are three different rows)
2. MNO R, S
This won't work (multiple results in a subquery):
SELECT ID,
Name,
(SELECT SomeColumn FROM TableB WHERE F_ID=TableA.ID)
FROM TableA
This is a trivial problem if I do the processing on the client side. But this will mean I will have to run X queries on every page, where X is the number of results of TableA.
Note that I can't simply do a GROUP BY or something similar, as it will return multiple results for rows of TableA.
I'm not sure if a UDF, utilizing COALESCE or something similar might work?
Even this will serve the purpose
Sample data
declare #t table(id int, name varchar(20),somecolumn varchar(MAX))
insert into #t
select 1,'ABC','X' union all
select 1,'ABC','Y' union all
select 1,'ABC','Z' union all
select 2,'MNO','R' union all
select 2,'MNO','S'
Query:
SELECT ID,Name,
STUFF((SELECT ',' + CAST(T2.SomeColumn AS VARCHAR(MAX))
FROM #T T2 WHERE T1.id = T2.id AND T1.name = T2.name
FOR XML PATH('')),1,1,'') SOMECOLUMN
FROM #T T1
GROUP BY id,Name
Output:
ID Name SomeColumn
1 ABC X,Y,Z
2 MNO R,S
1. Create the UDF:
CREATE FUNCTION CombineValues
(
#FK_ID INT -- The foreign key from TableA which is used
-- to fetch corresponding records
)
RETURNS VARCHAR(8000)
AS
BEGIN
DECLARE #SomeColumnList VARCHAR(8000);
SELECT #SomeColumnList =
COALESCE(#SomeColumnList + ', ', '') + CAST(SomeColumn AS varchar(20))
FROM TableB C
WHERE C.FK_ID = #FK_ID;
RETURN
(
SELECT #SomeColumnList
)
END
2. Use in subquery:
SELECT ID, Name, dbo.CombineValues(FK_ID) FROM TableA
3. If you are using stored procedure you can do like this:
CREATE PROCEDURE GetCombinedValues
#FK_ID int
As
BEGIN
DECLARE #SomeColumnList VARCHAR(800)
SELECT #SomeColumnList =
COALESCE(#SomeColumnList + ', ', '') + CAST(SomeColumn AS varchar(20))
FROM TableB
WHERE FK_ID = #FK_ID
Select *, #SomeColumnList as SelectedIds
FROM
TableA
WHERE
FK_ID = #FK_ID
END
In MySQL there is a group_concat function that will return what you're asking for.
SELECT TableA.ID, TableA.Name, group_concat(TableB.SomeColumn)
as SomColumnGroup FROM TableA LEFT JOIN TableB ON
TableB.TableA_ID = TableA.ID
I think you are on the right track with COALESCE. See here for an example of building a comma-delimited string:
http://www.sqlteam.com/article/using-coalesce-to-build-comma-delimited-string
You may need to provide some more details for a more precise response.
Since your dataset seems kind of narrow, you might consider just using a row per result and performing the post-processing at the client.
So if you are really looking to make the server do the work return a result set like
ID Name SomeColumn
1 ABC X
1 ABC Y
1 ABC Z
2 MNO R
2 MNO S
which of course is a simple INNER JOIN on ID
Once you have the resultset back at the client, maintain a variable called CurrentName and use that as a trigger when to stop collecting SomeColumn into the useful thing you want it to do.
Assuming you only have WHERE clauses on table A create a stored procedure thus:
SELECT Id, Name From tableA WHERE ...
SELECT tableA.Id AS ParentId, Somecolumn
FROM tableA INNER JOIN tableB on TableA.Id = TableB.F_Id
WHERE ...
Then fill a DataSet ds with it. Then
ds.Relations.Add("foo", ds.Tables[0].Columns("Id"), ds.Tables[1].Columns("ParentId"));
Finally you can add a repeater in the page that puts the commas for every line
<asp:DataList ID="Subcategories" DataKeyField="ParentCatId"
DataSource='<%# Container.DataItem.CreateChildView("foo") %>' RepeatColumns="1"
RepeatDirection="Horizontal" ItemStyle-HorizontalAlign="left" ItemStyle-VerticalAlign="top"
runat="server" >
In this way you will do it client side but with only one query, passing minimal data between database and frontend
I tried the solution priyanka.sarkar mentioned and the didn't quite get it working as the OP asked. Here's the solution I ended up with:
SELECT ID,
SUBSTRING((
SELECT ',' + T2.SomeColumn
FROM #T T2
WHERE WHERE T1.id = T2.id
FOR XML PATH('')), 2, 1000000)
FROM #T T1
GROUP BY ID
Solution below:
SELECT GROUP_CONCAT(field_attr_best_weekday_value)as RAVI
FROM content_field_attr_best_weekday LEFT JOIN content_type_attraction
on content_field_attr_best_weekday.nid = content_type_attraction.nid
GROUP BY content_field_attr_best_weekday.nid
Use this, you also can change the Joins
SELECT t.ID,
t.NAME,
(SELECT t1.SOMECOLUMN
FROM TABLEB t1
WHERE t1.F_ID = T.TABLEA.ID)
FROM TABLEA t;
This will work for selecting from different table using sub query.
I have reviewed all the answers. I think in database insertion should be like:
ID Name SomeColumn
1. ABC ,X,Y Z (these are three different rows)
2. MNO ,R,S
The comma should be at previous end and do searching by like %,X,%