IBM Interview Questions, Process, and Tips for Experienced

SQL is a programming language used to manage and manipulate relational databases. Joins are used to combine data from multiple tables.

• SQL stands for Structured Query Language

• It is used to create, modify, and query databases

• Joins are used to combine data from two or more tables based on a related column

• Types of joins include inner join, left join, right join, and full outer join

• Example: SELECT * FROM table1 INNER JOIN t

Set operators are used to combine the result sets of two or more SELECT statements.

• Set operators include UNION, UNION ALL, INTERSECT, and EXCEPT.

• UNION combines the results of two SELECT statements and removes duplicates.

• UNION ALL combines the results of two SELECT statements and includes duplicates.

• INTERSECT returns only the common rows between two SELECT statements.

• EXCEPT returns only the rows from the first SELECT st...read more

Constraints are rules that are applied to a table column or a group of columns.

• Constraints ensure data accuracy and consistency in a database.

• They can be used to enforce rules like uniqueness, primary key, foreign key, etc.

• Constraints can be added when creating a table or altered later using ALTER TABLE statement.

• Examples of constraints include NOT NULL, CHECK, UNIQUE, PRIMARY KEY, FOREIGN KEY, etc.

Growth to me means continuous improvement and development in various aspects of life, such as career, personal skills, and knowledge.

• Growth involves expanding one's knowledge and skills through learning and experience

• It also includes personal development, such as improving communication skills or emotional intelligence

• In a career context, growth can mean advancing to higher positions or taking on more responsibilities

• O...read more