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Transposing a table from multicolumn to key-value


Transposing a table from multicolumn to key-value

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sabyasm
sabyasm
Mr or Mrs. 500
Mr or Mrs. 500 (534 reputation)Mr or Mrs. 500 (534 reputation)Mr or Mrs. 500 (534 reputation)Mr or Mrs. 500 (534 reputation)Mr or Mrs. 500 (534 reputation)Mr or Mrs. 500 (534 reputation)Mr or Mrs. 500 (534 reputation)Mr or Mrs. 500 (534 reputation)

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I have a transactional table with 100+ columns and each row is uniquely identified by an id column. For a data export requirement, we need to make export the table flat - aka, id/column_name/column_value format. the number of columns are dynamic in nature. By this, I mean : there could be 10 additional columns in near future. Some columns might get dropped as well. This is another reason for exporting as a name/value pair.

A dynamic pivoting might be the answer - I tried using dynamic pivoting using xmlpath/cross apply and made things complex enough to get a cross joined resultset. Here is the sample schema (input/output) with sample data:


http://sqlfiddle.com/#!3/f0efa/7


Any help is highly appreciated.

--
Sabya

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