Tag Archives: sql commands

Hi, I will share with you Step by Step Oracle SQL Tutorials For Beginners.

Hi, What is sql in this article? , What are the sql rules of writing? We will find answers to such questions . WHAT IS SQL (STRUCTURED QUERY LANGUAGE) ? …

CREATING TABLE WITH SUB-QUERIES With this method, table is created automatically with the column types that result from a query. While the table is created, data that came from the …

Chapter 7 – CREATING AND MANAGING TABLES Classify Main Database Objects Examining Table Structure Data Types of the Columns Creating a Simple Table Understanding How Schema Objects Work DATABASE OBJECTS …

Hi, I’m writing Oracle SQL articles and sharing with you. You can learn SQL by following my articles and trying example SQL’s. Here are the SQL Tutorials, I highly recommend …

Chapter 5 – Selecting Data From Multiple Tables Usage of multiple tables in one query Combining tables – JOIN Different Types of SQL Join Left Outer Join Right Outer Join …

Chapter 4 – Group Functions AVG Function SUM Function MIN Function MAX Function COUNT Function DISTINCT Function GROUP BY Statement HAVING Statement   One row functions can be applied to …

CONVERSION FUNCTIONS TO_CHAR (DATE) TO_CHAR(date, ‘format’) It’s case-sensitive and must be written between quotes. It must contain a valid date format. Let’s list the hire dates of employees like below. …

NUMERIC FUNCTIONS ROUND Let’s try some different usages of the ROUND function. SELECT ROUND (45.923), ROUND (45.943, 1), ROUND (45.924, 2), ROUND (44.923, -1), ROUND (55.923, -2) FROM DUAL;   …

Chapter 3 – Single Row Functions Charcter Functions Numeric Functions Date Functions Converting Functions NVL Function Decode Function CASE Statement   SQL FUNCTIONS SQL Functions can be classiifed under 2 …