What do high confidence, low confidence and no confidence mean in explain plan?


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why varchar takes 2 extra bytes?

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Hi frinds pls help me regarding this question WHY usi is two amp operation in teradata? THANKS IN ADVANCE....

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IN A TABLE CAN WE USE PRIMARY KEY IN ONE COLUMN AND IN ANOTHER COLUMN BOTH UNIQUE AND NOT NULL CONSTRAINS.IF YES HOW?PLZ GIVE ME A EXAMPLE.

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