Hi all,
any1 tried before this?
the column will set it in a way that no repeated/duplicated record is
allowed to enter.

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For example:
Column1
Test1
Test2
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when user enter"test3", it will become like this:
For example:
Column1
Test1
Test2
test3
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But when user enter "Test1", it will prompt the user that record is already
inside. Please enter new record.

Thanks~