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System Date minus three years?


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  #1  
Old October 23rd, 2003, 10:03 AM
aturserviss aturserviss is offline
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System Date minus three years?
Would anyone be able to help, please?I have a table called PS_N_ACTIVE (ORACLE DB) and I wanted to subtract three years from N_ACT_DUTY_SVC_DT. The date format is MM-DD-YYYY. I can't find the correct SQL statement to insert. Basically, I'm using several joins and top of stack logic but I wanted to be able to insert a statement something to the effect: ...."where ACT.N_ACT_DUTY_SVC_DT = SYSDATE MINUS 3 YEARS" and be able to have the output or results in the MM-DD-YYYY format.

I picked up a reference book The practical SQL Handbook but couldn't find any reference to what I wanted to do.

Appreciate any help. Thank you.
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Old October 24th, 2003, 11:47 AM
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Old October 24th, 2003, 12:34 PM
hedge hedge is offline
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how about using add_months
ie.
PHP Code:
 select add_months(sysdate,-36) from dual 
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Old October 24th, 2003, 12:53 PM
Dan Drillich Dan Drillich is offline
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In Oracle 9i the following will do it:

select sysdate - to_yminterval('03-00') from dual

Cheers,
Dan
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Old October 24th, 2003, 01:13 PM
aturserviss aturserviss is offline
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Thank you. I appreciate your help.
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