Sample data -
CREATE TABLE dbo.#test
(
id int NOT NULL,
name varchar (10) NULL,
name2 varchar (10) null
);
insert into #test values ('1','abc','abc')
insert into #test values ('1','abc','yyy')
insert into #test values ('1','abc','zzz')
insert into #test values ('1','abc','ddd')
select * from #test
Now, I'm trying to join/merge column 'name' and 'name2' followed by remove duplicates and shows value as below - Any thoughts ?
Name
abc
ddd
yyy
zzz
I need to get this done using CASE statement i.e., sample code is below. (Albeit this can be achieved by using UNION but I need to use CASE Statement)
select case 'b'
when 'a'
then name
when 'b'
then coalesce (name , name2 )
end as NAME from #test
This is awful and should really be done using a UNION, but I think it's what you were after in this example:-
select
case
when (select count(*) from #test b where b.name = a.name2) > 1 then a.name
else a.name2
end as Name
from #test a
Really though, you should have something like this:-
select name from #test
union
select name2 from #test
Well one of the way to get desired result is by using Union
and another alternate way is this -
SELECT id
,(
SELECT max(name1)
FROM (
VALUES (name)
,(name2)
) res(name1)
) AS name
FROM #test
Result
id Name
--------
1 abc
1 ddd
1 yyy
1 zzz
Related
I currently have a query that looks like this:
Select val1, val2, val3, val4 from Table_A where someID = 10
UNION
Select oth1, val2, val3, oth4 from Table_B where someId = 10
I initially run this same query above but with EXCEPT, to identify which ID's are returned with differences, and then I do a UNION query to find which columns specifically are different.
My goal is to compare the values between the two tables (some columns have different names). And that's what I'm doing.
However, the two queries above have about 250 different field names, so it is quite mundane to scroll through to find the differences.
Is there a better and quicker way to identify which column names are different after running the two queries?
EDIT: Here's my current process:
DROP TABLE IF EXISTS #Table_1
DROP TABLE IF EXISTS #Table_2
SELECT 'Dave' AS Name, 'Smih' AS LName, 18 AS Age, 'Alabama' AS State
INTO #Table_1
SELECT 'Dave' AS Name, 'Smith' AS LName, 19 AS Age, 'Alabama' AS State
INTO #Table_2
--FInd differences
SELECT Name, LName,Age,State FROM #Table_1
EXCEPT
SELECT Name, LName,Age,State FROM #Table_2
--How I compare differences
SELECT Name, LName,Age,State FROM #Table_1
UNION
SELECT Name, LName,Age,State FROM #Table_2
Is there any way to streamline this so I can get a column list of differences?
Here is a generic way to handle two tables differences.
We just need to know their primary key column.
It is based on JSON, and will work starting from SQL Server 2016 onwards.
SQL
-- DDL and sample data population, start
DECLARE #TableA TABLE (rowid INT IDENTITY(1,1), FirstName VARCHAR(100), LastName VARCHAR(100), Phone VARCHAR(100));
DECLARE #TableB table (rowid int Identity(1,1), FirstName varchar(100), LastName varchar(100), Phone varchar(100));
INSERT INTO #TableA(FirstName, LastName, Phone) VALUES
('JORGE','LUIS','41514493'),
('JUAN','ROBERRTO','41324133'),
('ALBERTO','JOSE','41514461'),
('JULIO','ESTUARDO','56201550'),
('ALFREDO','JOSE','32356654'),
('LUIS','FERNANDO','98596210');
INSERT INTO #TableB(FirstName, LastName, Phone) VALUES
('JORGE','LUIS','41514493'),
('JUAN','ROBERTO','41324132'),
('ALBERTO','JOSE','41514461'),
('JULIO','ESTUARDO','56201551'),
('ALFRIDO','JOSE','32356653'),
('LUIS','FERNANDOO','98596210');
-- DDL and sample data population, end
SELECT rowid
,[key] AS [column]
,Org_Value = MAX( CASE WHEN Src=1 THEN Value END)
,New_Value = MAX( CASE WHEN Src=2 THEN Value END)
FROM (
SELECT Src=1
,rowid
,B.*
FROM #TableA A
CROSS APPLY ( SELECT [Key]
,Value
FROM OpenJson( (SELECT A.* For JSON Path,Without_Array_Wrapper,INCLUDE_NULL_VALUES))
) AS B
UNION ALL
SELECT Src=2
,rowid
,B.*
FROM #TableB A
CROSS APPLY ( SELECT [Key]
,Value
FROM OpenJson( (SELECT A.* For JSON Path,Without_Array_Wrapper,INCLUDE_NULL_VALUES))
) AS B
) AS A
GROUP BY rowid,[key]
HAVING MAX(CASE WHEN Src=1 THEN Value END)
<> MAX(CASE WHEN Src=2 THEN Value END)
ORDER BY rowid,[key];
Output
rowid
column
Org_Value
New_Value
2
LastName
ROBERRTO
ROBERTO
2
Phone
41324133
41324132
4
Phone
56201550
56201551
5
FirstName
ALFREDO
ALFRIDO
5
Phone
32356654
32356653
6
LastName
FERNANDO
FERNANDOO
I have this table:
IF OBJECT_ID('tempdb..#Test') IS NOT NULL
DROP TABLE #Test;
CREATE TABLE #Test (Col VARCHAR(100));
INSERT INTO #Test
VALUES ('1'), ('2'), ('10'), ('A'), ('B'), ('C1'), ('1D'), ('10HH')
SELECT * FROM #Test
I want to sort by numeric value first and then alphabetically.
Outcome of sort I want to is:
1
1D
2
10
10HH
A
B
C1
Assume structure of entries is one of those (with no dash of course)
number
number-string
string-number
string
if there is an entry like string-number-string, assume it is string-number
It's not pretty, but it works.
SELECT T.Col
FROM #Test T
CROSS APPLY (VALUES(PATINDEX('%[^0-9]%',T.Col)))PI(I)
CROSS APPLY (VALUES(TRY_CONVERT(int,NULLIF(ISNULL(LEFT(T.Col,NULLIF(PI.I,0)-1),LEN(T.Col)),''))))TC(L)
ORDER BY CASE WHEN TC.L IS NULL THEN 1 ELSE 0 END,
TC.L,
T.Col;
Honestly, I would suggest that if you want to order your data like a numerical value you actually store the numerical value in a numerical column; clearly the above should be a numerical prefix value, and then the string suffix. If you then want to then have the values you have, the use a (PERSISTED) computed column. Like this:
CREATE TABLE #Test (Prefix int NULL,
Suffix varchar(100) NULL,
Col AS CONCAT(Prefix, Suffix) PERSISTED);
INSERT INTO #Test (Prefix, Suffix)
VALUES (1,NULL), (2,NULL), (10,NULL), (NULL,'A'), (NULL,'B'), (NULL,'C1'), (1,'D'), (10,'HH');
SELECT Col
FROM #Test
ORDER BY CASE WHEN Prefix IS NULL THEN 1 ELSE 0 END,
Prefix,
Suffix;
This awful and unintuitive solution, that would be unnecessary if you stored the two pieces of data separately, brought to you by bad idea designs™:
;WITH cte AS
(
SELECT Col, rest = SUBSTRING(Col, pos, 100),
possible_int = TRY_CONVERT(bigint, CASE WHEN pos <> 1 THEN
LEFT(Col, COALESCE(NULLIF(pos,0),100)-1) END)
FROM (SELECT Col, pos = PATINDEX('%[^0-9]%', Col) FROM #Test) AS src
)
SELECT Col FROM cte
ORDER BY CASE
WHEN possible_int IS NULL THEN 2 ELSE 1 END,
possible_int,
rest;
Result:
Col
1
1D
2
10
10HH
A
B
C1
Example db<>fiddle
How to select table's columns using its number? For example:
Select col:1, col:2
From Banks
instead of
Select Id, Name
From Banks
I have problem like this - I have list of selecting queries in database, but first and second columns has different names/aliases:
Id, Name
Name, Description
1 CODE, 'Male' VALUE
...
I want to filter them with a parameter:
Select Id, Name
From Banks
Where lower(Name) like lower(''%' + p_bank_name + '%'')'
So, how can I write this code:
Select col:1, col:2
From Banks
Where lower(col:2) like lower(''%' + p_bank_name + '%'')'
??
Also, I can write sub queries:
Select col:1, col:2
From (
Select Id, Name
From Banks
) r
Where lower(col:2) like lower(''%' + p_bank_name + '%'')'
But, how??
This is not exactly same as what you are trying to do. However, It is almost there. It won't select column by number, however you dont have to specify the explicit column from your real table while writing this query.
As all us suggested, you have to use the dynamic SQL. This is a little idea I created:
create table test1(name1 varchar(10), address1 varchar(10), zipcode1 varchar(10))
insert into test1 values('Test1.1','USA','12344')
insert into test1 values('Test1.2','USA','12344')
insert into test1 values('Test1.3','USA','12344')
insert into test1 values('Test1.4','USA','12344')
create table test2(name2 varchar(10), address2 varchar(10), zipcode2 varchar(10))
insert into test2 values('Test2.1','USA','12344')
insert into test2 values('Test2.2','USA','12344')
insert into test2 values('Test2.3','USA','12344')
insert into test2 values('Test2.4','USA','12344')
You see, the Table name, and the Column name are completely different in both.
Now this sql statement doesn't care about column names :
select * from
(
select '' as T1, '' as T2, '' as T3
union all
select * from test1 --No matter whether it is Id, Name or description
union all
select * from test2 --No matter whether it is Id, Name or description
) as D
where D.T1<>'' -- your other conditions!
Only issue is, since we are using Union, you have to match the number of columns when you specify your empty columns:
select '' as T1, '' as T2, '' as T3, '' as T4, 0 as T5 -- and so on
Here's the output:
Table1
Id bigint primary key identity(1,1)
Status nvarchar(20)
Insert dummy data
Insert into Table1 values ('Open') --1
Insert into Table1 values ('Open') --2
Insert into Table1 values ('Grabbed') --3
Insert into Table1 values ('Closed') --4
Insert into Table1 values ('Closed') --5
Insert into Table1 values ('Open') --6
How would I construct a single select statement which orders the data where records with 'Grabbed' status is first, followed by 'Closed', followed by 'Open' in SQL Server
Output:
Id Status
3 Grabbed
4 Closed
5 Closed
1 Open
2 Open
6 Open
I think you need something like this:
select *
from yourTable
order by case when Status = 'Grabbed' then 1
when Status = 'Closed' then 2
when Status = 'Open' then 3
else 4 end
, Id;
[SQL Fiddle Demo]
Another way is to using CTE like this:
;with cte as (
select 'Grabbed' [Status], 1 [order]
union all select 'Closed', 2
union all select 'Open', 3
)
select t.*
from yourTable t
left join cte
on t.[Status] = cte.[Status]
order by cte.[order], Id;
[SQL Fiddle Demo]
This could be done much better with a properly normalized design:
Do not store your Status as a textual content. Just imagine a typo (a row with Grabed)...
Further more a lookup table allows you to add side data, e.g. a sort order.
CREATE TABLE StatusLookUp(StatusID INT IDENTITY PRIMARY KEY /*you should name your constraints!*/
,StatusName VARCHAR(100) NOT NULL
,SortRank INT NOT NULL)
INSERT INTO StatusLookUp VALUES
('Open',99) --ID=1
,('Closed',50)--ID=2
,('Grabbed',10)--ID=3
CREATE TABLE Table1(Id bigint primary key identity(1,1) /*you should name your constraints!*/
,StatusID INT FOREIGN KEY REFERENCES StatusLookUp(StatusID));
Insert into Table1 values (1) --1
Insert into Table1 values (1) --2
Insert into Table1 values (3) --3
Insert into Table1 values (2) --4
Insert into Table1 values (2) --5
Insert into Table1 values (1) --6
SELECT *
FROM Table1 AS t1
INNER JOIN StatusLookUp AS s ON t1.StatusID=s.StatusID
ORDER BY s.SortRank;
I find that the simplest method uses a string:
order by charindex(status, 'Grabbed,Closed,Open')
or:
order by charindex(',' + status + ',', ',Grabbed,Closed,Open,')
If you are going to put values in the query, I think the easiest way uses values():
select t1.*
from t1 left join
(values ('Grabbed', 1), ('Closed', 2), ('Open', 3)) v(status, priority)
on t1.status = v.status
order by coalesce(v.priority, 4);
Finally. This need suggests that you should have a reference table for statuses. Rather than putting the string name in other tables, put an id. The reference table can have the priority as well as other information.
Try this:
select Id,status from tablename where status='Grabbed'
union
select Id,status from tablename where status='Closed'
union
select Id,status from tablename where status='Open'
I need to implement custom ordering for my table. For example I have a table called "TestTest" with values: a, d01, d04, d02, b . I need to select data and order them so that values with "d" will be first and rest will be sorted alphanumerical. So the result would be d01,d02,d03,a,b
Script to create and insert data:
CREATE TABLE TestTest(
Name varchar(200)
)
DELETE FROM TestTest
INSERT INTO TestTest( Name )
VALUES( 'a' )
INSERT INTO TestTest( Name )
VALUES( 'd01');
INSERT INTO TestTest( Name )
VALUES( 'd04');
INSERT INTO TestTest( Name )
VALUES( 'd02');
INSERT INTO TestTest( Name )
VALUES( 'b' );
Thx for any help ;)
Select *
From TestTest
Order By CASE WHEN LEFT(Name,1)='d' THEN 1 ELSE 2 END,Name
SQL Fiddle Demo
Quick soution:
Select *
from TestTest
order by case when Name like 'd%' then 'aaaaa'+Name else Name end
select * from TestTest order by case when Name='d01' then 1
when Name='d02' then 2
when Name ='d04' then 3
end desc