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101
Difference between 3NF and BCNF in simple terms (must be able to explain to an 8-year old)
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54
What is a Projection?
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47
Selecting distinct rows in relational algebra
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43
Normalization: What does "repeating groups" mean?
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40
In SQL, is it composite or compound keys?
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36
Would like to Understand 6NF with an Example
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28
What is the difference between a primary key and an index key
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23
AND field NOT IN(NULL) returns an empty set
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22
Who does a product owner typically report to?
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20
MySQL: Using DATETIME as primary key
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20
SQL Server dynamic PIVOT query?
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19
What is the difference between logical data model and conceptual data model?
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19
create foreign key without a primary key
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19
Can we update primary key values of a table?
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19
What if developers don't want to spend their time on manual testing?
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19
What deficiencies do you feel exist with SQL and what changes would you make to it?
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17
When should you denormalize?
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17
NoSql vs Relational database
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17
Why is there still a varchar data type?
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17
Term for a one-row table?
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17
Superkey, candidate key & primary key
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17
Do graph databases deprecate relational databases?
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16
Developer keeps underestimating tasks time
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16
Union All With if/else T-SQL
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16
“Relation” versus “relationship” in RDBMS/SQL?
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15
During pre-planning developers do not have time to understand a task they have not investigated themselves, how to address their concerns?
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15
Why can't I perform an aggregate function on an expression containing an aggregate but I can do so by creating a new select statement around it?
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15
Is DB Normalization done purely based on the primary key or is it done based on all the candidate keys?
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15
Definition of a Story Point
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14
Foreign Keys vs. Partial Keys and their E-R representations
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