- PostgreSQL - Home
- PostgreSQL - Overview
- PostgreSQL - Environment Setup
- PostgreSQL - Syntax
- PostgreSQL - Data Types
- PostgreSQL - Operators
- PostgreSQL - Expressions
- PostgreSQL Database
- PostgreSQL - Create Database
- PostgreSQL - ALTER DATABASE
- PostgreSQL - Drop Database
- PostgreSQL - Loading Database
- PostgreSQL - Rename Database
- PostgreSQL - Select Database
- PostgreSQL - Show Database
- PostgreSQL Query Operations
- PostgreSQL - SELECT
- PostgreSQL - CREATE
- PostgreSQL - INSERT
- PostgreSQL - UPDATE
- PostgreSQL - DELETE
- PostgreSQL - ALTER TABLE Command
- PostgreSQL - WHERE Clause
- PostgreSQL - ORDER BY Clause
- PostgreSQL - GROUP BY
- PostgreSQL - HAVING Clause
- PostgreSQL - DISTINCT Keyword
- PostgreSQL - LIMIT Clause
- PostgreSQL - LIKE Clause
- PostgreSQL - WITH Clause
- PostgreSQL - AND & OR Clauses
- PostgreSQL - DROP TABLE
- PostgreSQL - Upsert
- TRUNCATE TABLE Command
- PostgreSQL JOINS & Schemas
- PostgreSQL Schemas
- PostgreSQL Joins
- PostgreSQL Data Integrity & Transaction
- PostgreSQL - Constraints
- PostgreSQL - Transactions
- PostgreSQL - Commit
- PostgreSQL - Rollback
- PostgreSQL - Views
- PostgreSQL Functions
- PostgreSQL - ALIAS Syntax
- PostgreSQL - Functions
- PostgreSQL - Useful Function
- PostgreSQL - MAX() Function
- PostgreSQL - MIN() Function
- PostgreSQL - SUM() Function
- PostgreSQL - COUNT() Function
- PostgreSQL - Array Function
- PostgreSQL - String Function
- PostgreSQL - Numeric Function
- PostgreSQL Operators
- PostgreSQL - UNION Operator
- PostgreSQL - INTERSECT Operator
- PostgreSQL - EXCEPT Operator
- PostgreSQL - ANY Operator
- PostgreSQL - ALL Operator
- PostgreSQL - EXISTS Operator
- PostgreSQL Interface
- PostgreSQL - C / C++
- PostgreSQL - Java
- PostgreSQL - PHP
- PostgreSQL - Perl
- PostgreSQL - Python
- Advanced PostgreSQL
- PostgreSQL - NULL Values
- PostgreSQL - Triggers
- PostgreSQL - Indexes
- PostgreSQL - Locks
- PostgreSQL - Sub Queries
- PostgreSQL - Auto Increment
- PostgreSQL - Privileges
- PostgreSQL - Date/Time Functions & Operators
- PostgreSQL - Errors & Messages
- PostgreSQL - Assert
Quiz on PostgreSQL Expressions
1. What is an expression in PostgreSQL?
2. Which operator is used for string concatenation in PostgreSQL?
3. What does the COALESCE function do?
4. Which function can be used to extract the year from a date in PostgreSQL?
5. What type of expressions can be used in PostgreSQL?
Advertisements