cloudEQ Database Developer Interview Questions, Process, and Tips

Indexing is a technique to improve database performance by reducing the time taken to retrieve data.

• Indexes are created on one or more columns of a table.

• Types of indexes include clustered, non-clustered, unique, and full-text indexes.

• Clustered indexes determine the physical order of data in a table.

• Non-clustered indexes are separate structures that contain a copy of the indexed columns and a pointer to the actual data...read more

Optimize select statements by using indexes, avoiding unnecessary joins, and limiting the number of columns selected.

• Use indexes to speed up queries

• Avoid unnecessary joins and subqueries

• Limit the number of columns selected

• Use WHERE clauses to filter results

• Use GROUP BY and ORDER BY clauses wisely

• Consider using stored procedures or views

• Regularly analyze and optimize the database

Stored procedures are pre-written SQL codes that can be saved and reused in a database.

• Stored procedures are used to improve database performance and security.

• They can be called from within an application or directly from the database.

• They can accept input parameters and return output parameters or result sets.

• Examples include procedures for inserting, updating, and deleting data.

• They can also be used for complex data

Joins are used to combine data from two or more tables based on a related column. A view is a virtual table created from a query.

• Joins are used to retrieve data from multiple tables based on a related column

• There are different types of joins such as inner join, left join, right join, and full outer join

• Views are virtual tables created from a query that can be used to simplify complex queries or restrict access to sensi...read more