Data transfer between databases with different structures
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This should be pretty straight forward to any SQL guru out there, but not really my forte. So would appreciate any help
Ok say we've got two databases with two tables and we need to
transfer data from one to another. However, the data structure in
sourceDB is different to targetDB. Better to illustrate:
sourceDB
tablesource
PIN SYSTEM HEADER PROPERTY VALUE STATUS
1000 AF ADDRESS DETAILS LINE 1 The Grange Active
1000 AF ADDRESS DETAILS LINE 2 69 Tintagel Way
1000 AF ADDRESS DETAILS LINE 3 Woking
1001 AF ADDRESS DETAILS LINE 1 50 Active
8888 AF ADDRESS DETAILS LINE 2 Evans Way
8888 AF ADDRESS DETAILS LINE 3 Islington
8888 AF ADDRESS DETAILS
8888 AF ADDRESS DETAILS
8888 AF ADDRESS DETAILS
Now each matching PIN on the multiple rows in sourceDB above relates to
one customer. In order to extract the relevant info for an address for
instance for each customer, we need to know the unique PIN, header,
property and value fields.
So I created this piece of SQL which to give me the result in targetDB:
INSERT targetDB.dbo.targettbl (pin, address1, address2, address3, MemberNo, Tel1, Tel2, Tel3, Tel4, DOB, Email, IDNumber, Title, Initials, Firstname, Surname, STATUS)
SELECT
PIN,
MAX(CASE WHEN HEADER = 'ADDRESS DETAILS' AND PROPERTY = 'LINE 1' THEN VALUE ELSE NULL END) AS address1,
MAX(CASE WHEN HEADER = 'ADDRESS DETAILS' AND PROPERTY = 'LINE 2' THEN VALUE ELSE NULL END) AS address2,
MAX(CASE WHEN HEADER = 'ADDRESS DETAILS' AND PROPERTY = 'LINE 3' THEN VALUE ELSE NULL END) AS address3,
MAX(CASE WHEN HEADER = 'AFORBES' AND PROPERTY = 'Membership Number' THEN VALUE ELSE NULL END) AS MemberNo,
MAX(CASE WHEN HEADER = 'AFS' AND PROPERTY = 'Membership Number' THEN STATUS ELSE NULL END) AS STATUS,
MAX(CASE WHEN HEADER = 'CONTACT DETAILS' AND PROPERTY = 'Preferred method of contact*' THEN VALUE ELSE NULL END) AS Tel1,
MAX(CASE WHEN HEADER = 'CONTACT DETAILS' AND PROPERTY = 'Tel number (o/h) e.g. 011 2690000' THEN VALUE ELSE NULL END) AS Tel2,
MAX(CASE WHEN HEADER = 'CONTACT DETAILS' AND PROPERTY = 'Mobile number e.g. 0821234567' THEN VALUE ELSE NULL END) AS Tel3,
MAX(CASE WHEN HEADER = 'CONTACT DETAILS' AND PROPERTY = 'Fax number e.g. 011 2691000' THEN VALUE ELSE NULL END) AS Tel4,
MAX(CASE WHEN HEADER = 'Date Of Birth' AND PROPERTY = 'eg. 04 Jan 1965' THEN VALUE ELSE NULL END) AS DOB,
MAX(CASE WHEN HEADER = 'Email address' AND PROPERTY = 'Email Address' THEN VALUE ELSE NULL END) AS Email,
MAX(CASE WHEN HEADER = 'ID Number' AND PROPERTY = 'Some ID Number' THEN VALUE ELSE NULL END) AS IDNumber,
MAX(CASE WHEN HEADER = 'Member Information' AND PROPERTY = 'Title' THEN VALUE ELSE NULL END) AS Title,
MAX(CASE WHEN HEADER = 'Member Information' AND PROPERTY = 'Initials' THEN VALUE ELSE NULL END) AS Initials,
MAX(CASE WHEN HEADER = 'Member Information' AND PROPERTY = 'Firstname' THEN VALUE ELSE NULL END) AS Firstname,
MAX(CASE WHEN HEADER = 'Member Information' AND PROPERTY = 'Surname' THEN VALUE ELSE NULL END) AS Surname
FROM
sourceDB.dbo.sourcetbl
GROUP BY PIN
However, keep getting this message:
Msg 8152, Level 16, State 14, Line 1
String or binary data would be truncated.
The statement has been terminated.
Warning: Null value is eliminated by an aggregate or other SET operation.
What am I doing wrong here????? Argggh!!!??
Many thanks in advance,
Paul
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the insert-sequence & select-sequence are out of order
insert-sequence: status at the end
select-sequence: status in the middle
move MAX(CASE WHEN HEADER = 'AFS' AND PROPERTY = 'Membership Number' THEN STATUS ELSE NULL END) AS STATUS
to the end of the select.
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thx everyone
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