1.
Define a temp table
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Xamarin SQL interview questions.
Only challenges
- 2.
What is a view?
Answer:
- 3.
What is PRIMARY KEY?
Answer:
- 4.
What is blocking?
Answer:
- 5.
What is Normalization?
Answer:
- 6.
What is the difference between WHERE clause and HAVING clause?
Answer:
- 7.
What is DEFAULT?
Answer:
- 8.
What is FOREIGN KEY?
Answer:
- 9.
What’s the difference between a local temp table and a global temp table?
Answer:
- 10.
How can a column with a default value be added to an existing table?
Answer:
- 11.
Is table size reduced, when you delete data from the table?
Answer:
- 12.
Define ACID Properties
Answer:
- 13.
Discuss INNER JOIN ON vs WHERE clause
Answer:
- 14.
What is the difference between “INNER JOIN” and “OUTER JOIN”?
Answer:
- 15.
What is the difference between JOIN and UNION?
Answer:
- 16.
What is the difference between UNION and UNION ALL?
Answer:
- 17.
What are the advantages of using Stored Procedures?
Answer:
- 18.
How do I perform an IF…THEN in an SQL SELECT?
Answer:
- 19.
What is the difference between inner and outer join?
Answer:
- 20.
Describe the difference between truncate and delete
Answer:
- 21.
What is Denormalization?
Answer:
- 22.
What are the difference between clustered and a non-clustered index?
Answer:
- 23.
How a database index can help performance?
Answer:
- 24.
What is a cursor how does it work?
Answer:
- 25.
What are row constructors?
Answer:
- 26.
Explain Function vs. Stored Procedure in SQL Server
Answer:
- 27.
What is collation?
Answer:
- 28.
Finding duplicate values in a SQL table
Answer:
- 29.
How to select first 5 records from a table?
Answer:
- 30.
How does a hash table index work?
Answer:
- 31.
How do I UPDATE from a SELECT in SQL Server?
Answer:
- 32.
What is a filegroup?
Answer:
- 33.
What is the cost of having a database index?
Answer:
- 34.
How does truncate and delete operation effect Identity?
Answer:
- 35.
What are DMV's and DMF's?
Answer:
- 36.
How does B-trees index work?
Answer:
- 37.
How deadlock is resolved?
Answer:
- 38.
What are statistics?
Answer:
- 39.
What is a linked server?
Answer:
- 40.
Explain the difference between exclusive lock and update lock
Answer:
- 41.
What is the difference among UNION, MINUS and INTERSECT?
Answer:
- 42.
How can we transpose a table using SQL (changing rows to column or vice-versa) ?
Answer:
- 43.
What's the difference between a primary key and a unique key?
Answer:
- 44.
Name types of Triggers
Answer:
- 45.
Explain a usage difference between user defined functions and stored procedures
Answer:
- 46.
What is Optimistic Locking and Pessimistic locking?
Answer:
- 47.
Select first row in each GROUP BY group (greatest-n-per-group problem)?
Answer:
- 48.
How does database indexing work?
Answer:
- 49.
What are some other types of indexes?
Answer:
- 50.
Name some disadvantages of a hash index
Answer:
- 51.
How does primary key constraint and unique key constraint effect null?
Answer:
- 52.
How can I do an UPDATE statement with JOIN in SQL?
Answer:
- 53.
How to generate row number in SQL Without ROWNUM
Answer:
- 54.
What would happen without an index?
Answer:
- 55.
Delete duplicate values in a SQL table
Answer:
- 56.
Insert results of a stored procedure into a temporary table
Answer:
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