SQL ORACLE Date and Quarter
I am currently working on sql oracle and have some problems with managing dates and quarters.
The first thing I am trying to do is give a quarter and a year, I would like to know the number of days in a quarter. For example, there were 90 days in Q1 2013, but there were 91 days in 2012.
The second thing I would like to do is convert the dd / qq / yyyy date to dd / mm / year date.
For example 60/2/2013 gives 30/5/2013. I'm new to Oracle so any greetings or function names would be much appreciated.
thank
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For your first question, hopefully this will give you some idea of what to do:
with sample_data as (select 2012 yr, 1 quarter from dual union all
select 2012 yr, 2 quarter from dual union all
select 2012 yr, 3 quarter from dual union all
select 2012 yr, 4 quarter from dual union all
select 2013 yr, 1 quarter from dual union all
select 2013 yr, 2 quarter from dual)
---- end of mimicking a table called "sample_data"; see query below:
select yr,
quarter,
add_months(to_date('01/01/'||yr, 'dd/mm/yyyy'), (quarter - 1)*3) qtr_st,
add_months(to_date('01/01/'||yr, 'dd/mm/yyyy'), quarter * 3) - 1 qtr_end,
add_months(to_date('01/01/'||yr, 'dd/mm/yyyy'), quarter * 3) - add_months(to_date('01/01/'||yr, 'dd/mm/yyyy'), (quarter - 1)*3) diff
from sample_data;
YR QUARTER QTR_ST QTR_END DIFF
---------- ---------- ---------- ---------- ----------
2012 1 01/01/2012 31/03/2012 91
2012 2 01/04/2012 30/06/2012 91
2012 3 01/07/2012 30/09/2012 92
2012 4 01/10/2012 31/12/2012 92
2013 1 01/01/2013 31/03/2013 90
2013 2 01/04/2013 30/06/2013 91
NB Since you are including day start_date in the count, the difference is how many days are between Q1 and Q1, or qtr_end - qtr_st + 1
from my query above.
For your second question, here's one way:
with sample_data as (select '60/2/2013' dy_qtr_fmt from dual union all
select '60/02/2013' dy_qtr_fmt from dual union all
select '01/1/2013' dy_qtr_fmt from dual union all
select '1/1/2013' dy_qtr_fmt from dual)
---- end of mimicking a table called "sample_data"; see query below:
select dy_qtr_fmt,
add_months(year_st, (qtr-1)*3) + num_days_in_qtr - 1 dt
from (select dy_qtr_fmt,
to_date('01/01/'||substr(dy_qtr_fmt, -4), 'dd/mm/yyyy') year_st,
to_number(substr(dy_qtr_fmt, instr(dy_qtr_fmt, '/', 1, 1) + 1, instr(dy_qtr_fmt, '/', 1, 2) - instr(dy_qtr_fmt, '/', 1, 1) -1)) qtr,
to_number(substr(dy_qtr_fmt, 1, instr(dy_qtr_fmt, '/', 1, 1) - 1)) num_days_in_qtr
from sample_data);
DY_QTR_FMT DT
---------- ----------
60/2/2013 30/05/2013
60/02/2013 30/05/2013
01/1/2013 01/01/2013
1/1/2013 01/01/2013
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