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sql server 2014 - column only has 1's and -1's sql

问题描述:

I have a column in one table that gives me the values I expect as a primary key, in another table I have the same column as a foreign key, but when I query this other table the values that exist are only -1, and 1.

Is this some kind of lookup or index? What is going on here?

Thank you

SQL Server 2014

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