Detailed Calender Query

SELECT TRUNC( sd + rn ) time_id,
TO_CHAR( sd + rn, 'fmDay' ) day_name,
TO_CHAR( sd + rn, 'D' ) day_number_in_week,
TO_CHAR( sd + rn, 'DD' ) day_number_in_month,
TO_CHAR( sd + rn, 'DDD' ) day_number_in_year,
TO_CHAR( sd + rn, 'W' ) calendar_week_number,
( CASE WHEN TO_CHAR( sd + rn, 'D' ) IN ( 1, 2, 3, 4, 5, 6 ) THEN
NEXT_DAY( sd + rn, 'SATURDAY' ) ELSE
( sd + rn ) END ) week_ending_date,
TO_CHAR( sd + rn, 'MM' ) calendar_month_number,
TO_CHAR( LAST_DAY( sd + rn ), 'DD' ) days_in_cal_month,
LAST_DAY( sd + rn ) end_of_cal_month,
TO_CHAR( sd + rn, 'FMMonth' ) calendar_month_name,
( ( CASE WHEN TO_CHAR( sd + rn, 'Q' ) = 1 THEN
TO_DATE( '03/31/' || TO_CHAR( sd + rn, 'YYYY' ), 'MM/DD/YYYY' )
WHEN TO_CHAR( sd + rn, 'Q' ) = 2 THEN
TO_DATE( '06/30/' || TO_CHAR( sd + rn, 'YYYY' ), 'MM/DD/YYYY' )
WHEN TO_CHAR( sd + rn, 'Q' ) = 3 THEN
TO_DATE( '09/30/' || TO_CHAR( sd + rn, 'YYYY' ), 'MM/DD/YYYY' )
WHEN TO_CHAR( sd + rn, 'Q' ) = 4 THEN
TO_DATE( '12/31/' || TO_CHAR( sd + rn, 'YYYY' ), 'MM/DD/YYYY' )
END ) - TRUNC( sd + rn, 'Q' ) + 1 ) days_in_cal_quarter,
TRUNC( sd + rn, 'Q' ) beg_of_cal_quarter,
( CASE WHEN TO_CHAR( sd + rn, 'Q' ) = 1 THEN
TO_DATE( '03/31/' || TO_CHAR( sd + rn, 'YYYY' ), 'MM/DD/YYYY' )
WHEN TO_CHAR( sd + rn, 'Q' ) = 2 THEN
TO_DATE( '06/30/' || TO_CHAR( sd + rn, 'YYYY' ), 'MM/DD/YYYY' )
WHEN TO_CHAR( sd + rn, 'Q' ) = 3 THEN
TO_DATE( '09/30/' || TO_CHAR( sd + rn, 'YYYY' ), 'MM/DD/YYYY' )
WHEN TO_CHAR( sd + rn, 'Q' ) = 4 THEN
TO_DATE( '12/31/' || TO_CHAR( sd + rn, 'YYYY' ), 'MM/DD/YYYY' )
END ) end_of_cal_quarter,
TO_CHAR( sd + rn, 'Q' ) calendar_quarter_number,
TO_CHAR( sd + rn, 'YYYY' ) calendar_year,
( TO_DATE( '12/31/' || TO_CHAR( sd + rn, 'YYYY' ), 'MM/DD/YYYY' )
- TRUNC( sd + rn, 'YEAR' ) ) days_in_cal_year,
TRUNC( sd + rn, 'YEAR' ) beg_of_cal_year,
TO_DATE( '12/31/' || TO_CHAR( sd + rn, 'YYYY' ), 'MM/DD/YYYY' ) end_of_cal_year
FROM ( SELECT TO_DATE( '12/31/2002', 'MM/DD/YYYY' ) sd,
rownum rn FROM dual CONNECT BY level <= 6575 )
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