What is a trigger and what are its types?
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Table1- have two column filename data AFGDFD-20112011 hi how r u bsdasd-23042011 name shoud be in bold Now i want output like filename data AFGDFD hi how r u bsdasd name shoud be in bold Kindly answer this
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emp numb is unique because that is primary key,,but what is foreign key .. explain very clear with example