Petre,
Tuesday, November 05, 2002, 9:26:08 PM, you wrote:
PA> just out of interest,
PA> How can I create unique "data sets", or rather, set a set of data as
PA> unique, to prevent another entry in the table that meets the same
PA> criteria,
PA> for instance:
PA> id name surname address
PA> 1 john doe 1 street
PA> 2 mary jane 2 lane
PA> 3 john doe 3 ave
PA> 4 john doe 1 street
PA> As you can see row one and row 4 is identical in all 3 collumns, so how
PA> would I prevent a write like this to the table?
You can create UNIQUE key on these three fiels:
http://www.mysql.com/doc/en/CREATE_INDEX.html
http://www.mysql.com/doc/en/CREATE_TABLE.html
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