How to add an additional column in a table by comparing the values in a different column

Posted by S-Man on Stack Overflow See other posts from Stack Overflow or by S-Man
Published on 2010-04-18T22:19:02Z Indexed on 2010/04/18 22:23 UTC
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sql-server

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sql

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tsql

I have a table with the following records

id name city

1 aaa NY

2 bbb NY

3 ccc LA

4 ddd LA

5 eee NY

I want the table with an additional column by comparing the 'city' column. The values in the col4 should have '1' for every unique value in 'city' column and '0' for the repeating values in 'city' column.

id name city col4

1 aaa NY 1

2 bbb NY 0

3 ccc LA 1

4 ddd LA 0

5 eee NY 0

I hope to get some help.

Thanks

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