Date Difference between two different columns and rows
Hi Experts:
I had asked this question before but never received a correct answer. I'm currently using SQL 2000 and need to calculate the following:
EffDT TermDT Status
20071101 A
20070801 20071031 D
20070601 20070630 A <-------- Error
20070501 20070531 A
The above shows dates of member eligibility. Everytime that a new eligibility sequence (or line) is added the prior one is closed with the termdt and a new one is open. I need to make sure there are no gaps in the dates. For example if you like at the line marked with error, the line has a term date of 20070630 and the top line has an effective date of 20070801. This is incorrect because there's a time gap (July). The correct termdt for the error line should be 20070731 or the effective date on the next line should be 20070701. I can't figure out how to have SQL read the effdt on the top line and do a datediff of one day with the termdt in the bottom line.
I had asked this question before but never received a correct answer. I'm currently using SQL 2000 and need to calculate the following:
EffDT TermDT Status
20071101 A
20070801 20071031 D
20070601 20070630 A <-------- Error
20070501 20070531 A
The above shows dates of member eligibility. Everytime that a new eligibility sequence (or line) is added the prior one is closed with the termdt and a new one is open. I need to make sure there are no gaps in the dates. For example if you like at the line marked with error, the line has a term date of 20070630 and the top line has an effective date of 20070801. This is incorrect because there's a time gap (July). The correct termdt for the error line should be 20070731 or the effective date on the next line should be 20070701. I can't figure out how to have SQL read the effdt on the top line and do a datediff of one day with the termdt in the bottom line.
Please post the sql query you run to analyze this.
ASKER CERTIFIED SOLUTION
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ASKER
SELECT t1.abeligno,t1.absubno, t1.abeffdt, t1.abtermdt, DATEDIFF(d, CAST(t1.abeffdt as datetime), (
SELECT MAX(CAST(t2.abtermdt as datetime))
FROM diamond.JMELIGM0_DAT t2
WHERE t2.abtermdt > '0' and t2.abeligno < t1.abeligno)) AS Interval
FROM diamond.JMELIGM0_DAT t1
WHERE t1.absubno like '199803000000'
ORDER BY t1.abeffdt desc
Where t1.abeligno is the line number and t1.absubno is the member ID
SELECT MAX(CAST(t2.abtermdt as datetime))
FROM diamond.JMELIGM0_DAT t2
WHERE t2.abtermdt > '0' and t2.abeligno < t1.abeligno)) AS Interval
FROM diamond.JMELIGM0_DAT t1
WHERE t1.absubno like '199803000000'
ORDER BY t1.abeffdt desc
Where t1.abeligno is the line number and t1.absubno is the member ID
ASKER
imitchie:
Your solution almost acts like a union query it's not comparing the dates (effdate and termdate) between the two lines
Your solution almost acts like a union query it's not comparing the dates (effdate and termdate) between the two lines
ASKER
imitchie:
I used your solution but also joined the subid number and that seems to give me the answer and I needed I also added to the where statement so that I see only the line I needed. This seems to be the solution I'm looking for. Thank you
I used your solution but also joined the subid number and that seems to give me the answer and I needed I also added to the where statement so that I see only the line I needed. This seems to be the solution I'm looking for. Thank you