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Lesson 89: COUNT Aggregate Function in PostgreSQL Step by Step
In this lesson, you will learn how to use the COUNT aggregate function in PostgreSQL step by step. The video explains how COUNT helps you count rows, records, and values in a table. You will learn the difference between COUNT(*), COUNT(column_name), and COUNT(DISTINCT column_name). This lesson also shows practical examples for counting total records, non-null values, and unique values, making it useful for beginners who want to analyze data in PostgreSQL.
Видео Lesson 89: COUNT Aggregate Function in PostgreSQL Step by Step канала Yousufzai SkillTech
Видео Lesson 89: COUNT Aggregate Function in PostgreSQL Step by Step канала Yousufzai SkillTech
PostgreSQL SQL Database Database Management System DBMS RDBMS ORDBMS Data Data Analysis SQL Programming Pashto Microsoft SQL Server MySQL Microsoft Access Create Database Drop Database SQL Commands SQL Syntax DDL DML DQL DCL DTCL Data Type Primary Key Unique Key Foreign Key Composite Key Keys in PostgreSQL Blank NULL ALTER TABLE CONSTRAINT DROP CHECK UNIQUE
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