Help with a SQL query.

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I need a query where
a particular column value is required as of a particular date whereas some of the other column values are required as of between two dates
e.g.

SQL

select t1.col1, t2.col2, SUM(col3) 
from my_table1 inner join my_table2 on  t1.id = t2.id
where [Date] between '2014-01-01' and '2014-02-11'
group by t1.col1, t2.col2

Now, I need another column i.e. col4 which required only as of a particular date

i.e. if I were to write a separate query it would be :

SQL

select t2.col4 from my_table1 inner join my_table2 on  t1.id = t2.id
where [Date] = '2014-02-11'

Is there any way both of these could be achieved using a single query?
Any help would be much appreciated.

Posted 11-Feb-14 17:18pm

aakar

Updated 11-Feb-14 17:43pm

AmitGajjar

v3

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Comments

chaau 12-Feb-14 0:20am

Is this col4 required to be selected as a fourth column in your query, or in place of one of already selected columns (i.e. col2)?

aakar 12-Feb-14 1:36am

yes col4 is required to be selected as the fourth column

2 solutions

Solution 2

I'd do it like this:

select t1.col1, t2.col2, SUM(col3),
case when [Date] = '2014-02-11' then col4 else NULL end
from my_table1 inner join my_table2 on  t1.id = t2.id
where [Date] between '2014-01-01' and '2014-02-11'
group by t1.col1, t2.col2, case when [Date] = '2014-02-11' then col4 else NULL end

Posted 11-Feb-14 22:58pm

chaau

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SDAP_INDIA · Accepted Answer · 2014-02-11T21:11:00

Solution 1

you can use CTE with this to achieve it easily.

Posted 11-Feb-14 21:11pm

SDAP_INDIA