Skip to main content

Comma separated list different ways

creating table with sample data.

create table CommaSeparatedList
(
ID int identity(1,1) primary key,
Name varchar(100)
)

insert into CommaSeparatedList (Name)
values('rakesh'),('raju'),('ravi')

Method-1:

Using ISNULL :


declare @commalist varchar(max)=null

select @commalist=isnull((@commalist+','),'')+cast(ID as varchar(max)) from CommaSeparatedList

select @commalist

output:

1,2,3

Method-2:

Using COALESCE :

declare @commalist varchar(max)=null

select @commalist=coalesce(@commalist+',','')+cast(ID as varchar(max)) from CommaSeparatedList

select @commalist

output:

1,2,3

Method-3:

Using FOR XML PATH :

select stuff((select distinct ','+cast(ID as varchar(max)) from CommaSeparatedList
group by ','+cast(ID as varchar(max))
for xml path('')),1,1,'')

output:

1,2,3
Labels:

Comments

Post a Comment

Popular posts from this blog

Coalesce function

Coalesce function returns the first non-null value among the arguments. Syntax: Coalesce (expression [,..n]) Here is example using Coalesce function Example 1 DECLARE @Str1 varchar ( 10 ), @str2 varchar ( 20 ), @Str3 varchar ( 20 ) SET @Str2 = 'Sql' , @Str3 = 'Server' SELECT COALESCE ( @Str1 , @str2 , @Str3 ) As [Coalesce] In above example @Str2 value is ‘Sql’ , @str3 value is ‘Server’  and @str1 values is Null because it not assigned any value . Output: It return’s “Sql” because Coalesce function return’s first non null value. Example 2: Coalesce in select statement. IF OBJECT_ID ( 'Employee' , 'U' ) IS NOT NULL DROP TABLE Employee CREATE TABLE Employee (   ID INT IDENTITY ( 1 , 1 ) PRIMARY KEY ,   NAME VARCHAR ( 20 ),   SALARY INT ) INSERT INTO Employee   ( NAME , SALARY ) VALUES ( 'Rakesh' , 5000 ),(NULL, 6000 ),( 'Naresh...
1 comment
Read more

CONCAT FUNCTION IN SQL SERVER 2012

Concat function is used concatnating the values among the different arguments. Syntax: Concat([String1],[String2]..[StringN]);  DECLARE @FName VARCHAR ( 50 ), @LName VARCHAR ( 50 ); SET @FName = 'Rakesh' ; SET @LName = 'Kalluri' ; SELECT CONCAT ( @FName , ' ' , @LName ) as [FullName] ; Output: Rakesh Kalluri --Before SQL 2012 Versions we can use like this way DECLARE @FName VARCHAR ( 50 ), @LName VARCHAR ( 50 ); SET @FName = 'Rakesh' ; SET @LName = 'Kalluri' ; SELECT @FName + ' ' + @LName as [FullName] ; Output: Rakesh Kalluri --But Before SQL 2012 Versions there are 2 problems when we  contacting . --1.Need to replace NULL Value to Empty.if we directly concat NULL Value the  Entire  result also NULL. --Before 2012: DECLARE @FName VARCHAR ( 50 ), @LName VARCHAR ( 50 ); SET @FName = 'Rakesh' ; SELECT @FName + ' ' + @LName a...
Post a Comment
Read more

Rank Functions in SQL SERVER

1 . ROW_NUMBER () OVER ( [PARTITION BY CLAUSE] < ORDER BY CLUASE >): Returns the sequantial number of a row within the a partition of result set at 1 for the first row of the each partition. 2. RANK () OVER ( [PARTITION BY CLAUSE] < ORDER BY CLUASE >): Returns rank for rows within the partition of result set. 3. DENSE_RANK () OVER ( [PARTITION BY CLAUSE] < ORDER BY CLUASE >): Returns rank for rows within the partition of result set.With out any gaps in the ranking. 4. NTILE ( INTEGER_EXPRESSION ) OVER ( [PARTITION BY CLAUSE] < ORDER BY CLUASE >): Distributes the rows in an ordered partition into a specified number of groups. Examples: --create Employee table create table Employee (                 EmpId int identity ( 1 , 1 ) primary key ,              ...
1 comment
Read more