This query is fine works.
SELECT * FROM TABLE WHERE 330110042 IN (iItem01,iItem02,iItem03,iItem04,iItem05,iItem_1,iItem_2,iItem_3,iItem_4,iItem_5,iItem_6,iItem_7,iItem_8,iItem_9,iItem_10,iItem_11,iItem_12,iItem_13,iItem_14,iItem_15,iItem_16,iItem_17,iItem_18,iItem_19,iItem_20,iItem_21,iItem_22,iItem_23,iItem_24,iItem_25,iItem_26,iItem_27,iItem_28,iItem_29,iItem_30)
But this query didnt work.
SELECT * FROM TABLE WHERE 330110042, 330110002, 330110002 IN (iItem01,iItem02,iItem03,iItem04,iItem05,iItem_1,iItem_2,iItem_3,iItem_4,iItem_5,iItem_6,iItem_7,iItem_8,iItem_9,iItem_10,iItem_11,iItem_12,iItem_13,iItem_14,iItem_15,iItem_16,iItem_17,iItem_18,iItem_19,iItem_20,iItem_21,iItem_22,iItem_23,iItem_24,iItem_25,iItem_26,iItem_27,iItem_28,iItem_29,iItem_30)
How i work in SQL Server?
It's difficult to tell your exact goal here, but one possibility would be to turn the list of values into a table structure of its own. A Common Table Expression might work:
;WITH Ids AS
(
SELECT 330110042 AS Id
UNION ALL
SELECT 330110002
)
SELECT t.*
FROM [Table] t
INNER JOIN Ids i ON t.iItem01 = i.Id OR t.iItem02 = i.Id OR...
But, maybe a solution with UNPIVOT would be more elegant. I presume that your table has a primary key column called Id:
;WITH Unpivoted AS
(
SELECT Id, ColName, ColValue
FROM (SELECT Id, iItem01, iItem02, iItem03
FROM [Table] t) p
UNPIVOT
(ColValue FOR ColName IN (iItem01, iItem02, iItem03)) AS unpvt
)
SELECT t.*
FROM [Table] t
WHERE EXISTS (SELECT 1 FROM Unpivoted u
WHERE t.Id = u.Id
AND u.ColValue IN (330110042, 330110002))
Of course, you would add all the necessary columns. I added only the first three for this example.
Related
I am looking to left join another table because there are two columns in that table that I need to add to my query..how can I left join onto my existing query? For example the query I am using is similar to the one below..
select subject, sum(cnt_daily) as cnt,
min(cnt_daily) as min_cnt_daily, max(cnt_daily) as max_cnt_daily
from (
select study_date, subject, count(*) as cnt_daily
from mytable
where study_date >= '2022-01-01'
group by study_date, subject
) t
group by subject
I tried
select *
from mytable
left join table2
on mytable.id= table1.id
order by table1.id;
But i know this isnt right
You may use CTE:
WITH t AS (
select study_date, subject, count(*) as cnt_daily
from mytable
where study_date >= '2022-01-01'
group by study_date, subject
)
select subject, sum(cnt_daily) as cnt,
min(cnt_daily) as min_cnt_daily, max(cnt_daily) as max_cnt_daily
from t
group by subject
This could encourage reuse of the query inside CTE.
If i just created a select query and want to use the new data in a new query do I reference the previously created query as the FROM in a new select query? The query I just created in my database is listed as SQLQuery1.sql so is that what I put as the FROM for the new query?
Here is an example of a query that contains multiple select statements:
SELECT T1.col_a, T1.col_b, T2.col_c
FROM (SELECT col_a, col_b, ...etc...) AS T1
JOIN (SELECT col_a, col_c, ...etc...) AS T2
ON T1.col_a = T2.col_a
I would use CTE (Common Table Expression).
Have a look at the following code:
WITH MainQuery
AS
(
select col1, col2, col3
from dbo.TableName
)
select a.col1, a.col2, a.col3, b.col1
from MainQuery as a
join someotherdata as b
on a.col1 = b.col1;
I would like to add the count result of a 2nd query to the result set which queries the 1st table and connect this subquery with the ID of the 1st Table result. This simplified code explains it:
Select
ID_Field_Table1,
(Select Count(x)
From Table2
Where ID_Field_Table2 = ID_Field_Table1) As mycount
From Table1
What is the correct syntax?
Thanks
This code is simplified but the construction is the same. In my DB the ID_Field_Table2 and ID_Field_Table1 have the same name (let's say ID_Field). If I use this same Name, the SubQuery goes like "...Where ID_Field = ID_Field.." and this always Returns a Reslut, because it is not connecting the queries ("Select a Where x = x" returns any record in the table 2).
Select
ID_Field AS ID1,
(Select Count(x)
From Table2
Where ID_Field = ID1) As mycount
From Table1
It just returns an error, saying that ID1 does not exist.
When I use the original name of the columns (which are the same), the result is wrong
When I us an alias, an error occurs
So I think the query is wrong at all.
Well, you can't use an alias defined in the select clause, but you can use the aliases defined in the from clause:
Select
ID_Field AS ID1,
(Select Count(x)
From Table2
Where ID_Field = t1.ID_Field) As mycount
From Table1 t1
You can also do it without an alias, since the sub query is for a different table:
Select
ID_Field AS ID1,
(Select Count(x)
From Table2
Where ID_Field = Table1.ID_Field) As mycount
From Table1
However, I suspect a query using left join to a derived table as suggested in esta's answer would have better performance.
Something like this?
Select
Table1.ID_Field_Table1,
T2.MYCOUNT
From Table1
LEFT JOIN (SELECT ID_Field_Table2, COUNT(x) AS MYCOUNT FROM TABLE2 GROUP BY ID_FIELD_TABLE2) T2 ON T2.ID_Field_Table2=Table1.ID_Field_Table1
Try This query once it may help you.
Select ID_Field_Table1,COUNT_NBR
cross apply
(
Select Count(x) as COUNT_NBR
From Table2
Where ID_Field_Table2 = ID_Field_Table1
group by ID_Field_Table1
) As mycount
From Table1
I have a table like so:
Id, Comment, LastUpdatedDate
I'm tyring to select the latest comment for that id. The table can have many comments on that id with different dates but I'm trying to get the latest date out of there. I've tried the following with no success:
SELECT tt.*
FROM tagtestresultcomment tt
INNER JOIN
(
SELECT tag_id, MAX(last_update) AS MaxDateTime
FROM tagtestresultcomment
GROUP BY tag_id
) groupedtt ON tt.tag_id = groupedtt.tag_id AND tt.last_update = groupedtt.MaxDateTime
order by tag_id
Does anyone have any ideas of how to achieve this?
Thanks!
It sounds like you want only the latest comment for each tag_id? In which case, here is one approach you can use from SQL 2005 and on:
;WITH CTE AS
(
SELECT *,
ROW_NUMBER() OVER(PARTITION BY tag_id ORDER BY last_update DESC) AS RowNo
FROM TagTestResultComment
)
SELECT * FROM CTE WHERE RowNo = 1
try this
Select * from tagtestresultcomment where last_update in
(select max(last_update) from tagtestresultcomment group by tag_id)
your query code is too redundant. first
tt.tag_id = groupedtt.tag_id AND tt.last_update = groupedtt.MaxDateTime
it's enough just
tt.tag_id = groupedtt.tag_id
and second, it's enough just
SELECT [desired field list extcept last_update and ],
tag_id,
MAX(last_update) AS MaxDateTime
FROM
tagtestresultcomment
group by
tag_id, [desired field list extcept last_update and tag_id]
at all to achieve your objective
I have tried something like this:
declare #tagtestresultcomment table
(
id int
, comment varchar(50)
,LastUpdatedDate datetime
)
--==== Populate table
insert into #tagtestresultcomment(id,comment,LastUpdatedDate)
select 1,'My name is Arthur','2011-06-09 00:00:00' union all
select 2,'My name is DW','2011-06-19 00:00:00' union all
select 2,'Arthur is my brother','2011-06-21 00:00:00' union all
select 1,'I have a sister named DW','2011-06-21 00:00:00' union all
select 3,'I am Muffy','2011-06-14 00:00:00' union all
select 3,'I like sports','2011-06-14 00:00:00'
-- SELECT stmt
select * from #tagtestresultcomment t
join
(
select id, MAX(lastupdateddate) as LastUpdatedDate from #tagtestresultcomment group by id
) m
on t.id = m.id
and t.LastUpdatedDate = m.LastUpdatedDate
The "MAX" group function wasn't working for me, so I used a sub-query. I had trouble wrapping my head around your single table example, so I'm using a common parent-child 1-to-many relationship with a blog and comment tables as an example.
SELECT
b.id,
b.content,
c.id,
c.blog_id,
c.content,
c.last_update
FROM blog b
INNER JOIN blog_comment c
ON b.id = c.blog_id AND c.id = (
SELECT TOP 1 id FROM blog_comment WHERE blog_id = b.id ORDER BY last_update DESC
)
The query takes a hit on my sub-query, as it will call that "SELECT TOP 1" query for each record in the blog table. I'd like to hear of a faster, more efficient example if possible.
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,%