Counting number of errors and generating a report

Question

Hi All
I am fairly new to PL/SQL and I have a bit of a problem that I can't work out.
What I need to do, is take a file that has a 6-digit store code, and a corresponding date, that indicates that the store made a particular error on that date. That table only has 2 columns, the STOREID and ERRORDATE. If a particular store did not make the error, they will not be included in this table.
This table is provided to me monthly, .CSV format which i can import and place in a table with no problems.
I also have another "master" table that contains a list of all the store codes, and their corresponding name & address details, so something like MASTERID (number), STORENAME, ADDRESS1, ADDRESS2, ADDRESS3 ( all varchar2(200)). STOREID will be included somewhere in the MASTERID column.
I need to check each store and see if it has made the error. If it has, it needs to be placed in a table which is then used to issue an error noice. The part I'm finding difficult, is that if the store has made the same error in the past 3 months, it needs to be placed in a table so it can be issued a 'second notice' and if it has made the error twice previously in the past 6 months it needs to be placed in another table to be issued a 'final notice'.
So I somehow need to keep track of which stores have made the error for the past 6 months and then check against it to see if it should be a first, second or third notice. I thought of using another table, call it HISTORY, with the columns STOREID and ERRORDATE, which indicates the store id code and the date the error was made
The way I thought of doing it was to use the MASTERID column from the master detail table, and check each store code against the provided monthly file (STOREID). If it is in there, check the past 6 month history, count the number of previous errors and issue the notice accordingly IE-
Store code is in the monthly file but not found in the previous 6 months in HISTORY - first notice, put store code and date into HISTORY table
Store code is in the monthly and found ONCE in the previous 6 months in HISTORY - second notice, put store code and date into HISTORY table
Store code is in the monthly file and TWICE in the previous 6 months in HISTORY - third notice, put store code and date into HISTORY
Store code is in the monthly file and THREE+ times in the past 6 months in HISTORY - put store code into a table for further action, put store code and date into HISTORY
If anyone could help it would be appreciated! I will be using this in Application Express, just as an anonymous pl/sql block, and I really am not sure how to do it.
Importing and exporting .CSV files from tables is not an issue, that part I can do.
The versions are ApEx 3.0.1 and Oracle 10g 10.2
Thanks
Bill

Answer 1

As Frank said, please provide us some sample data else refer
WITH T1 AS
SELECT 'SRT1' STORE_ID, 'ER1' ERROR_CD FROM DUAL UNION ALL
SELECT 'SRT2' STORE_ID, 'ER6' ERROR_CD FROM DUAL UNION ALL
SELECT 'SRT1' STORE_ID, 'ER5' ERROR_CD FROM DUAL UNION ALL
SELECT 'SRT3' STORE_ID, 'ER9' ERROR_CD FROM DUAL UNION ALL
SELECT 'SRT1' STORE_ID, 'ER60' ERROR_CD FROM DUAL UNION ALL
SELECT 'SRT2' STORE_ID, 'ER10' ERROR_CD FROM DUAL
T2 AS
SELECT COUNT(ERROR_CD) OVER (PARTITION BY STORE_ID)CNT_ERR,T1.*
FROM   T1
SELECT DECODE(CNT_ERR,1,'FIRST_NOTICE',2,'SECOND_NOTICE',3,'FINAL_NOTICE') NOTICE, T2.*
FROM T2;*009*