PostgreSQL Interview Questions 1. What is PostgreSQL and why it is used for? 2. What are the features of PostgreSQL? 3. How to install PostgreSQL on windows? 4. How to install PostgreSQL on Ubuntu? 5. List data type in PostgreSQL? 6. How to change the datatype of a column in Postgre...
SQL knowledge is essential for the majority of services. There are a lot of important questions for which the candidates need to be prepared while going for an interview. TheSQL Interview Questionsare very important for getting a job. One must answer the SQL Interview Questions to qualify for ...
Use libraries and modules such as 'mysql', 'pg' (for PostgreSQL), 'sqlite3' (for SQLite), or 'mssql' (for Microsoft SQL Server), depending on your database of choice to execute raw SQL queries in Node JS. Select the Appropriate Database Module: Select the Node JS database module ...
Here are some considerations for answering this question: Ask clarifying questions Is the interviewer looking for a design of the core features, or a high-level overview of the whole service? What are the constraints of the system? What are your assumptions? (traffic distribution, number of ...
Data Analyst SQL Interview Questions Image by Author Question #1: Days At Number One (PostgreSQL) “Find the number of days a US track has stayed in the 1st position for both the US and worldwide rankings. Output the track name and the number of days in the 1st position. Order your out...
Structured data: Schema-based data, Datastore in SQL, Postgresql databases etc Semi-structured data : Json objects , json arrays, csv , txt ,xlsx files,web logs ,tweets etc Unstructured data : Audio, Video files, etc FREE eBook on 250 Hadoop Interview Questions and Answers 6. On what conce...
For example, a docker-compose.yml file might look like this: version: '3.9' services: web: build: . ports: - "5000:5000" depends_on: - db db: image: postgres volumes: - db-data:/var/lib/postgresql/data volumes: db-data: Powered By This file defines two services, web and db, ...
Examples include Oracle, Microsoft SQL Server, MySQL, and PostgreSQL Examples include Oracle SQL, Microsoft SQL Server T-SQL, MySQL SQL, and PostgreSQL SQLExample of how DBMS and SQL work together for database management:Let’s say you have a database that stores customer information, and you...
SQL is Structured Query Language, which is a computer language for storing, manipulating and retrieving data stored in relational database.SQL can be used in different languages or database management systems like Oracle,SQL Server,Postgresql. ...
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