QSpiders HR Executive and Team Lead Interview Questions and Answers

Write a pivot dinamic column from rows in SQL server.

Q1. Clustered and non clustered indexing in SQL server
Ans. 
Clustered indexing physically reorders the data in the table, while non-clustered indexing creates a separate structure.
• Clustered indexing determines the physical order of data rows in a table based on the indexed column.

• Non-clustered indexing creates a separate structure that contains the indexed column's values and pointers to the actual data rows.

• Clustered indexes are faster for retrieval but slower for inserts and ...read more
Answered by AI
Add your answer
Q2. Nested loops in SQL server
Ans. 
Nested loops in SQL server are used to iterate through multiple levels of data.
• Nested loops are used when you need to iterate through a set of data within another set of data.

• They can be implemented using nested SELECT statements or JOIN clauses.

• Example: SELECT * FROM table1 t1 INNER JOIN table2 t2 ON t1.id = t2.id WHERE t1.column = 'value'
Answered by AI
Add your answer

Repository pattern in asp.net core API