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Get FirstDate and LastDate of Every month from two Dates

Get FirstDate and LastDate of Every month from two Dates.

Like IF we have @date1='05/02/2015' and @date2= '11/25/2015' then we will get list of first date and last date from month 5 to 11.

SELECT ID,FirstDate,LastDate,Month,Year FROM [GetFLDatelist](@date1,@date2)

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2015-11-09 (first published: )

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Question of the Day

The string_agg function

We create the following table and then insert some records in it: 

create table t1 (
   id int primary key,
   category char(1) not null,
   product varchar(50)
);

insert into t1 values
(1, 'A', 'Product 1'),
(2, 'A', 'Product 2'),
(3, 'A', 'Product 3'),
(4, 'B', 'Product 4'),
(5, 'B', 'Product 5');
What happens if we execute the following query in both Sql Server and PostgreSQL? 
select id, 
category, 
string_agg(product, ';')
                 over (partition by category order by id
                 rows between unbounded preceding and unbounded following) as stragg
from t1;

See possible answers