If I have a table such as
1 A
1 B
1 A
1 B
2 C
2 C
And I want to select distinct from the two columns so that I would get
1
2
A
B
C
How can I word my query? Is the only way to concatenate the columns and wrap them around a distinct function operator?
You could use a union to create a table of all values from both columns:
select col1 as BothColumns
from YourTable
union
select col2
from YourTable
Unlike union all, union removes duplicates, even if they come from the same side of the union.
SQL Fiddle
Why even distinct in Union, try this :
select cast(id as char(1)) from test
union
select val from test
Please try:
Select Col1 from YourTable
union
Select Col2 from YourTable
UNION removes duplicate records (where all columns in the results are the same), UNION ALL does not.
Please check What is the difference between UNION and UNION ALL
For multiple columns, you can go for UNPIVOT.
SELECT distinct DistValues
FROM
(SELECT Col1, Col2, Col3
FROM YourTable) p
UNPIVOT
(DistValues FOR Dist IN
(Col1, Col2, Col3)
)AS unpvt;
Try this one -
DECLARE #temp TABLE
(
Col1 INT
, Col2 NVARCHAR(50)
)
INSERT INTO #temp (Col1, Col2)
VALUES (1, 'ab5defg'), (2, 'ae4eii')
SELECT disword = (
SELECT DISTINCT dt.ch
FROM (
SELECT ch = SUBSTRING(t.mtxt, n.number + 1, 1)
FROM [master].dbo.spt_values n
CROSS JOIN (
SELECT mtxt = (
SELECT CAST(Col1 AS VARCHAR(10)) + Col2
FROM #temp
FOR XML PATH(''), TYPE).value('.', 'VARCHAR(MAX)'
)
) t
WHERE [type] = N'p'
AND number <= LEN(mtxt) - 1
) dt
FOR XML PATH(''), TYPE).value('.', 'VARCHAR(MAX)'
)
Or try this -
DECLARE #temp TABLE
(
a CHAR(1), b CHAR(1)
)
INSERT INTO #temp (a, b)
VALUES
('1', 'A'), ('1', 'B'), ('1', 'A'),
('1', 'B'), ('2', 'C'), ('2', 'C')
SELECT a
FROM #temp
UNION
SELECT b
FROM #temp
Because what you want select is in different columns, you can use union like below:
select distinct tarCol from
(select distinct column1 as tarCol from table
union
select distinct column2 from table) as tarTab
You can use like this to get multiple distinct column values
(SELECT DISTINCT `enodeb` as res,
"enodeb" as columnname
FROM `raw_metrics`)
UNION
(SELECT DISTINCT `interval` as res,
"interval" as columnname
FROM `raw_metrics`)
Related
Table A has columns ID, COL1, COL2, COL3.
Table B has columns AID, ColumnName.
I need to get the [ColumnName] value in Table A based on the value of [ColumnName] in Table B.
In the example below:
For ID 1, I need to get the value of column COL1 (This is the value of [ColumnName] for AID 1 in Table B).
For ID 2, I need to get the value of column COL3 (This is the value of [ColumnName] for AID 2 in Table B).
Table A
ID COL1 COL2 COL3
1 a aa aaa
2 b bb bbb
Table B
AID ColumnName
1 COL1
2 COL3
Desired Result:
ID VALUE
1 a
2 bbb
How can I do that ?
Thank you.
Unpivot then join
drop table t
go
drop table t1
go
create table t
(ID int, COL1 varchar(10), COL2 varchar(10), COL3 varchar(10))
go
create table t1
(AID int,ColumnName varchar(10));
go
insert into t values
(1 , 'a', 'aa', 'aaa'),
(2 , 'b', 'bb', 'bbb')
go
insert into t1 values
(1 , 'COL1'),
(2 , 'COL3')
go
with cte as
(select id, u.col, u.val
from t
unpivot
(
val
for col in (col1, col2, col3)
) u
)
select cte.id,cte.val
from cte
join t1 on
t1.aid = cte.id and
t1.columnname = cte.col
go
id val
----------- ----------
1 a
2 bbb
(2 row(s) affected)
One possible approach is to unpivot the columns in TableA using VALUES table value constructor and additional APPLY operator:
Tables:
SELECT *
INTO TableA
FROM (VALUES
(1, 'a', 'aa', 'aaa'),
(2, 'b', 'bb', 'bbb')
) v (ID, COL1, COL2, COL3)
SELECT *
INTO TableB
FROM (VALUES
(1, 'COL1'),
(2, 'COL3')
) v (AID, COL)
Statement:
SELECT b.AID, v.VALUE
FROM TableB b
JOIN TableA a ON b.AID = a.ID
CROSS APPLY (VALUES
('COL1', a.COL1),
('COL2', a.COL2),
('COL3', a.COL3)
) v (COL, [VALUE])
WHERE v.COL = b.COL
Result:
AID
VALUE
1
a
2
bbb
Input:
COL1 COL2
---------------
10 a
20 b
30 c
40 NULL
50 d
Desired output:
COL1 COL2
-----------------
10 a
20 a,b
30 a,b,c
40 a,b,c
50 a,b,c,d
Below is the solution I have tried so far. But this is not returning the desired output.
WITH CTE AS
(
SELECT
COL1,
LAG(COL2) OVER (ORDER BY COL1) AS prev_word,
COL2
FROM
dbo.Scenario
), CTE_A AS
(
SELECT
COL1, COL2, prev_word,
CONCAT(ISNULL(Prev_word, ''), ' ', ISNULL(COL2, '')) AS Con_Word
FROM
CTE
)
SELECT *
FROM CTE_A
One possible solution is the following statement. I assume, that the values in the COL1 column define the order, that is needed for the aggregation.
Table:
CREATE TABLE Data (
COL1 int,
COL2 varchar(1)
)
INSERT INTO Data (COL1, COL2)
VALUES
(10, 'a'),
(20, 'b'),
(30, 'c'),
(40, NULL),
(50, 'd')
Statement for SQL Server 2012:
SELECT d.COL1, STUFF(a.COL2, 1, 1, '') AS COL2
FROM Data d
CROSS APPLY (
SELECT CONCAT(',', COL2)
FROM Data
WHERE COL1 <= d.COL1 AND COL2 IS NOT NULL
ORDER BY COL2
FOR XML PATH('')
) a (COL2)
ORDER BY d.COL1
Statement for SQL Server 2017+ (using STRING_AGG() for string aggregation):
SELECT d1.COL1, STRING_AGG(d2.COL2, ',') WITHIN GROUP (ORDER BY d2.COL1) AS COL2
FROM Data d1
JOIN Data d2 ON d1.COL1 >= d2.COL1
WHERE d2.COL2 IS NOT NULL
GROUP BY d1.COL1
ORDER BY d1.COL1
Result:
COL1 COL2
10 a
20 a,b
30 a,b,c
40 a,b,c
50 a,b,c,d
try the following:
declare #t table (COL1 int, COL2 varchar(max))
insert into #t select 10, 'a'
insert into #t select 20, 'b'
insert into #t select 30, 'c'
insert into #t select 40, NULL
insert into #t select 50, 'd'
select COL1, STUFF(
(
SELECT DISTINCT ',' + COL2 FROM #t t2
WHERE t.COL1 >= t2.COL1 for xml path('')
),1,1,''
) AS COL2
from #t t
SELECT ID,STUFF((SELECT DISTINCT ',' + [Values] FROM Table_ t2
WHERE t.ID>= t2.ID for xml path('')),1,1,'') AS [Values]
FROM Table_ t
I would like to get the desired output marked in green
the data points for each id get put into a single cell
Basically take all the events that have happened with A and attach it in the same order
Use Stuff Function:
DECLARE #tblTest AS Table(
ID INT,
EVENT VARCHAR(5)
)
INSERT INTO #tblTest VALUES
(1,'A'),
(1,'A'),
(1,'C'),
(2,'A'),
(2,'B'),
(2,'C')
SELECT DISTINCT
T1.ID,
STUFF
(
(SELECT '' + convert(varchar(10), T2.EVENT, 120)
FROM #tblTest T2
where T1.ID = T2.ID
FOR XML PATH (''))
, 1, 0, '') AS EVENT
FROM #tblTest T1
You can use FOR XML:
SELECT DISTINCT
ID,
(SELECT [EVENT] +''
FROM YourTable
WHERE ID = y.ID
FOR XML PATH('')
) as [EVENT]
FROM YourTable y
Output:
ID EVENT
1 AABCD
2 AABBCC
You can use UDF to do so as follows:
CREATE TABLE t(
id INT,
col CHAR(1)
);
INSERT INTO t VALUES (1,'a');
INSERT INTO t VALUES (1,'b');
INSERT INTO t VALUES (1,'c');
INSERT INTO t VALUES (1,'d');
INSERT INTO t VALUES (2,'e');
INSERT INTO t VALUES (2,'f');
INSERT INTO t VALUES (3,'g');
INSERT INTO t VALUES (4,'h');
The UDF (User defined function) -
USE [t]
GO
CREATE FUNCTION dbo.ConcatenateCols(#Id INT)
RETURNS VARCHAR(MAX)
AS
BEGIN
DECLARE #RtnStr VARCHAR(MAX)
SELECT #RtnStr = COALESCE(#RtnStr + '','') + col
FROM dbo.t
WHERE id = #Id AND col > ''
RETURN #RtnStr
END
GO
Finally the query and result:
SELECT id, dbo.ConcatenateCols(id) AS Cols -- UDF - ConcatenateCols(id)
FROM t GROUP BY Id
CREATE TABLE #temp(Id INt,Event Nvarchar(25))
INSERT INTO #temp
SELECT 1,
'A'
UNION ALL
SELECT 1,
'A'
UNION ALL
SELECT 1,
'B'
UNION ALL
SELECT 1,
'C'
UNION ALL
SELECT 1,
'D'
UNION ALL
SELECT 2,
'A'
UNION ALL
SELECT 2,
'A'
UNION ALL
SELECT 2,
'B'
UNION ALL
SELECT 2,
'B'
UNION ALL
SELECT 2,
'C'
UNION ALL
SELECT 2,
'C'
SELECT DISTINCT ID,
(SELECT [EVENT] +''
FROM #temp
WHERE ID = y.ID
FOR XML PATH('') ) AS [EVENT]
FROM #temp y
I've tried flexing my Google-fu to no avail so here I am! Unfortunately I cannot change anything about these tables as they are coming out of an application that I have to report out of.
In SQL Server 2008, I'm trying to replace multiple values in one text string column (Table 1) with the value from another table (Table 2).
Thanks in advance!!
Table 1
id value
-------------
1 a1, a2, a3
2 a2, a3
3 a4
Table 2
id value
---------
a1 Value1
a2 Value2
a3 Value3
a4 Value4
Desired Output
id value
-----------------------------
1 Value1, Value2, Value3
2 Value2, Value3
3 Value4
I'm sorry for this solution in advance :) It does what you need though:
create table TableA(
id int,
string varchar(255)
)
create table table2(
id varchar , text varchar(255)
)
insert into tableA values(1,'a,b,c,d')
insert into tableA values(2,'e,f')
insert into table2 values('a', 'value1')
insert into table2 values('b', 'value2')
insert into table2 values('c', 'value3')
insert into table2 values('d', 'value4')
insert into table2 values('e', 'value5')
insert into table2 values('f', 'value6')
select id, left(myConcat,len(myConcat)-1) from (
select c.id, replace(replace(CAST(CAST('<i'+stuff((select * from(
SELECT A.[id] ,
Split.a.value('.', 'VARCHAR(1000)') AS String
FROM (SELECT [id],
CAST ('<M>' + REPLACE([string], ',', '</M><M>') + '</M>' AS XML) AS String
FROM TableA) AS A CROSS APPLY String.nodes ('/M') AS Split(a)) a
inner join table2 b on a.String = b.id
where a.id = c.id
FOR XML PATH ('')
),1,2,'') AS XML).query('/text') AS VARCHAR(1000)),'<text>',''),'</text>',',') myConcat
from TableA c
group by c.id
) d
Using the DelimitedSplit8K found at http://www.sqlservercentral.com/articles/Tally+Table/72993/ as suggested by #user1221684 you might come up with something like this. Working with delimited data like this is a pain. First you have to parse the string so you can join it to the other table and then ruin by stuffing it back into a denormalized form.
Make sure that if you use this that you understand that function and what this code is doing. This is not entry level t-sql and it will be YOU supporting this at 3am when it breaks in production, not me.
if OBJECT_ID('tempdb..#table1') is not null
drop table #table1;
create table #table1
(
id int,
value varchar(50)
);
insert #table1
select 1, 'a1, a2, a3' union all
select 2, 'a2, a3' union all
select 3, 'a4';
if OBJECT_ID('tempdb..#table2') is not null
drop table #table2;
create table #table2
(
id varchar(50),
value varchar(50)
);
insert #table2
select 'a1', 'Value1' union all
select 'a2', 'Value2' union all
select 'a3', 'Value3' union all
select 'a4', 'Value4';
with parsedValues as
(
select t1.id
, t1.value
, LTRIM(x.item) as item
from #table1 t1
cross apply dbo.DelimitedSplit8K(t1.value, ',') x
)
, swappedVals as
(
select pv.id
, t2.value
from parsedValues pv
join #table2 t2 on t2.id = pv.item
)
select id
, STUFF((select ',' + value
from swappedVals sv2
where sv2.id = sv.id
order by sv2.value --need to make sure to order here so the results are in the right order
for XML path('')), 1, 1, '') as MyValues
from swappedVals sv
group by id
;
This site has a delimited text split function http://www.sqlservercentral.com/articles/Tally+Table/72993/
Use that function to split your values out into a temp table. Replace the values in your temp table with the new values. Then use STUFF..FOR XML to combine the records back together and update your table.
One query with a few cte's should be able to handle all of this after you add the function to your database.
Example using Sql Fiddle
Use this:
DECLARE #t TABLE(id int,value varchar(255))
INSERT INTO #t (id,value)
VALUES(1,'a1'),(2,'a2'),(3,'a3')....
SELECT *,STUFF((SELECT DISTINCT ','+value FROM #t WHERE id=t.id)
FOR XML PATH('')),1,2,' ')
FROM (SELECT DISTINCT ID FROM #t) t
DISTINCT in the case of same id, otherwise let it go
Hi Dear All My friends,
I want to ask one thing about sql cross tab function.Currently, I am using sql 2008 express version and my table structure is like below.
UserID Str_Value
1 A
1 B
1 C
2 A
2 B
3 D
3 E
I want to get like this .
UserID Str_Value
1 A,B,C
2 A,B
3 D,E
I don't want to use cursor.Is there any function for that one?
Please give me the right way.I really appreciate it.
Thanks.
Best Regards,
Chong
Hope this helps. You can comment ORDER BY T1.Str_Value if not needed and set the nvarchar(500) size as required
SELECT DISTINCT T1.UserId,
Stuff(
(SELECT N', ' + T2.Str_Value
FROM t T2
WHERE T2.userId = T1.userid
ORDER BY T2.Str_Value
FOR XML PATH(''),TYPE).value('text()[1]','nvarchar(500)'),1,2,N'')
AS Str_Value
FROM t T1
SELECT UserId, LEFT(Str_Value, LEN(Str_Value) - 1) AS Str_Value
FROM YourTable AS extern
CROSS APPLY
(
SELECT Str_Value + ','
FROM YourTable AS intern
WHERE extern.UserId = intern.UserId
FOR XML PATH('')
) pre_trimmed (Str_Value)
GROUP BY UserId, Str_Value
Try this:
SELECT DISTINCT
t1.UserID,
Values = SUBSTRING((SELECT ( ', ' + t2.Str_Value)
FROM dbo.Users t2
ORDER BY
t2.Str_Value
FOR XML PATH( '' )
), 3, 4000 )FROM dbo.Users t1
GROUP BY t1.UserID
create table #temp
(
userid int,
str_value varchar(1)
)
insert into #temp values (1, 'A')
insert into #temp values (1, 'B')
insert into #temp values (1, 'C')
insert into #temp values (2, 'A')
insert into #temp values (2, 'B')
insert into #temp values (3, 'D')
insert into #temp values (3, 'E')
select userid, left(x.str_value, len(x.str_value) -1) as str_value
from #temp t
cross apply
(
select str_value + ','
FROM #temp t1
where t.userid = t1.userid
for xml path('')
) x (str_value)
group by userid, x.str_value
drop table #temp