PRIMARY KEY vs UNIQUE KEY vs FOREIGN KEY Part 3, FOREIGN KEY CONSTRAINT, SELF REFERENCE KEY
PRIMARY KEY vs UNIQUE KEY vs FOREIGN KEY Part 3, FOREIGN KEY CONSTRAINT, SELF REFERENCE and CROSSREFERENCE FOREIGN KEY PRIMARY KEY vs UNIQUE KEY, PRIMARY KEY vs FOREIGN KEY, PRIMARY KEY Constraint vs UNIQUE KEY Constraint, PRIMARY KEY Constraint vs FOREIGN KEY Constraint, Index vs Key, Unique Key vs Unique Index, Unique Clustered Index, nonclustered index, composite key, candidate key, alternate key, HEAP in SQL, Key vs Index, WITH CHECK vs WITH NOCHECK FOREIGN KEY Constraint, Nonclustered PRIMARY KEY, Clustered Unique Key, PRIMARY KEY vs UNIQUE KEY vs FOREIGN KEY, PRIMARY KEY Constraint, UNIQUE KEY Constraint, FOREIGN KEY Constraint Agenda: Q01. What is the use of FOREIGN KEY constraints Q02. Can a unique constraint be referenced by a FOREIGN KEY Constraint Q03. How many foreign keys you can create in a table Q04. Can a FOREIGN KEY reference multiple columns of the parent table Q05. Is NUll value allowed in the FOREIGN KEY column Q06. Can a FOR
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