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Problem with CURRENT DATE in SQL - DB2

 
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Swapnil781
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PostPosted: Fri Dec 05, 2014 2:02 pm    Post subject: Problem with CURRENT DATE in SQL - DB2 Reply with quote

Hi,

I am facing issues with CURRENT DATE function in DB2.

Requirement : I have a table which has 4 columns CUST_NO, CITY, INTF_DT, FLAG.

CUST_NO CITY INTF_DT FLAG
1, A, 20141029, X
2, B, 20141026, Y
3, C, 20140603, X
4, D, 20140501, Y
5, E, 20140401, X
6, F, 20140201, Y

My requirement is to select the CUST_NO, FLAG for less than 2 months from the CURRENT DATE.

So output should have only CUST_NO = A & B, FLAG = X & X

Below is the query:
SELECT CUST_NO, FLAG
FROM TAB1
WHERE INTF_DT = CURRENT DATE - 2 MONTHS
But as the CURRENT DATE format is 2014-12-01 and INTF_DT format is CCYYMMDD, I am not getting the expected results.

I even used Substring function as below.

SELECT CUST_NO, FLAG, SUBSTR(CHAR(CURRENT DATE,ISO),1,4) || SUBSTR(CHAR(CURRENT DATE,ISO),6,2) || SUBSTR(CHAR(CURRENT DATE,ISO),9,2)

FROM TAB 1


In this case I am getting Current date format as 20141201 but I am not able to substract the date by 2 months.

I even tried

SELECT CUST_NO, FLAG
FROM TAB1
WHERE INTF_DT = (SUBSTR(CHAR(CURRENT DATE,ISO),1,4) || SUBSTR(CHAR(CURRENT DATE,ISO),6,2) || SUBSTR(CHAR(CURRENT DATE,ISO),9,2)) - 2 MONTHS )

but getting -171 SQL Code.
appreciate your helpful inputs.
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Thanks,
Swapnil
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Swapnil
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dbzTHEdinosauer
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Joined: 02 Oct 2006
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Answer was approved by Question owner.
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PostPosted: Mon Dec 08, 2014 6:34 pm    Post subject: Reply with quote

thread closed. multiple forums visited.

the problem, for others than the poster, is that the 2 months needs to be subtracted from the db2 current date register, then cast (via substring and concatenation) either the date from the table to be the same format as current date, or the opposite.
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