Hello to all,
I am new to this forum. I recently started learning SQL language. I have create one table in which there are three columns namely ids, tags1, tags2. In this ids is a primary key. In that I want one unique tags1-tags2-combination. So I have made three columns primary keys but the problem is that the second entry is inserted in another column. I don't know what is the problem in primary keys. Please help me to fix this problem.
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