what are rollup and cube in t-sql? : Transact sql
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What is the process of copying data from table a to table b?
what is Complex index. how to create it?
how to implement one-to-one, one-to-many and many-to-many relationships while designing tables? : Sql dba
what are null values? : Sql dba
7. Where would you look for errors from the database design?
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what is the difference between sql and t-sql? : Transact sql
What is the difference between UNIQUE CONSTRAINT and PRIMARY KEY? 1. There is no difference. 2. A PRIMARY KEY cannot be declared on multiple columns. 3. A UNIQUE CONSTRAINT cannot be declared on multiple columns. 4. A table can have multiple PRIMARY KEYS but only one UNIQUE CONSTRAINT. 5. A table can have multiple UNIQUE CONSTRAINTs but only one PRIMARY KEY.
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