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...
Prepare comprehensively for your PostgreSQL interview with our extensive list of 24 questions. These questions will test your expertise and readiness for any PostgreSQL interview scenario. Ideal for candidates of all levels, this collection is a must-have for your study plan. Download the free PDF ...
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 ...
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In SQL Server, PostgreSQL, and SQLite, this can be done using the except keyword as follows: select * from test_a except select * from test_b; In Oracle, the minus keyword is used instead. Note that if there are multiple columns, say ID and Name, the column should be explicitly state...
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...
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A few popular examples are MySQL, PostgreSQL, Microsoft Access, SQL Server, FileMaker, and Oracle. 3. What is Object-Relational Mapping? Object-Relational Mapping (ORM)is a tool that lets you query and manipulates data from a database using an object-oriented programming language such as Java...