SQL Tutorial

SQL Tutorial SQL Introduction SQL Syntax SQL OPERATORS SQL COMMANDS SQL Queries

SQL Table

SQL TABLE SQL CREATE TABLE SQL ALTER TABLE SQL DELETE SQL TRUNCATE TABLE SQL UPDATE TABLE

SQL SELECT

SQL SELECT Statement SQL SELECT IN Operator SQL BETWEEN Operator SQL SELECT BETWEEN Operator SQL SELECT AND Operator SQL SELECT DISTINCT SQL SELECT SUM SQL SELECT MAX SQL SELECT MIN SQL SELECT AVG

SQL Clause

SQL GROUP BY CLAUSE SQL ORDER BY Clause SQL HAVING Clause

SQL INSERT

SQL INSERT INTO Statement

SQL JOIN

SQL JOIN SQL Inner Join SQL Left Join SQL Right Join

SQL OPERATOR

SQL Comparison SQL LOGICAL Operator SQL Arithmetic

Difference

SQL vs NOSQL WHERE vs HAVING DELETE vs DROP GROUP BY vs ORDER BY DROP vs TRUNCATE SQL IN vs SQL EXISTS

MISC

SQL SubQuery SQL CASE Commit and Rollback in SQL Pattern Matching in SQL DDL Commands in SQL DML Commands in SQL Types of SQL Commands SQL COUNT SQL Primary Key SQL FOREIGN KEY SET Operators in SQL Check Constraint in SQL SQL EXCEPT SQL VIEW SQL WHERE Statement SQL CRUD Operation Where Condition in SQL TCL Commands in SQL Types of SQL JOINS SQL Nth Highest Salary SQL NOT OPERATOR SQL UNION ALL SQL INTERSECT SQL Data Definition Language SQL Data Manipulation Language SQL Data Control Language SQL CONSTRAINTS SQL KEYS Codd’s Rules in SQL What is SQL Injection? Trigger In SQL SQL WHERE Multiple Conditions Truncate function in SQL

How To

How to use the BETWEEN operator in SQL How To Use INNER JOIN In SQL How to use LIKE in SQL How to use HAVING Clause in SQL How to use GROUP BY Clause in SQL How To Remove Duplicates In SQL How To Delete A Row In SQL How to add column in table in SQL ? How to drop a column in SQL? How to create a database in SQL? How to use COUNT in SQL? How to Create Temporary Table in SQL? How to Add Foreign Key in SQL? How to Add Comments in SQL? How To Use Group By Clause In SQL How To Use Having Clause In SQL How To Delete Column In Table How To Compare Date In SQL

SQL Operators

Arithmetic Operators

Arithmetic operators are +, -, *, /, % performs addition, subtraction, multiplication, division, modulo respectively. Example:  
  • Select 100+222;
  • Select salary+100
From teacher Where teacher_id=1; Following output screen shows different arithmetic operations. We can perform single operation at a time or multiple operations.

Comparison Operators

Comparison operators ‘<’,   ‘<=’, ‘>’, >, =’, =’ performs less than, less than equal, greater than, greater than equal, equal respectively. Following output screen shows different comparison operators. Following output screen shows different queries with different comparison operations.  

Logical Operators

AND, OR, NOT, LIKE, IN, BETWEEN, ALL, SOME, ANY, EXISTS are logical operators from which some operators ALL, ANY, EXISTS, SOME used in sub queries. AND: It returns TRUE, if all the conditions separated by AND are TRUE. Example: Select * from teacher where salary>10000 and dept_name=’CS’; OR: It returns TRUE, if any of the conditions separated by OR is TRUE. Example: Select * from teacher where salary < 10000 OR dept_name=’IT’;   BETWEEN: It returns true, if the operands are within the range of comparison. Example: Select * from teacher where teacher_id between 4 and 8;   IN: It returns true if the operand is equal to one of the list of expressions. Example: Select * from teacher where teacher_id in (4,8); LIKE: It returns true if the operand matches a pattern. ‘_’ underscore represents single character. ‘%’ percent represents one or more characters. Example: Q1. Find out teachers whose name start with ‘a’? Select teacher_name from teacher where teacher_name like 'a%'; Q2 Find out teachers whose name end with ‘r’? Select teacher_name from teacher where teacher_name like '%r'; Q3 Find out teachers whose name contains letter ‘h’? Select teacher_name from teacher where teacher_name like '%h%'; Q4 Find out teacher whose name contains ‘h’ letter at third position? Select teacher_name from teacher where teacher_name like '__h%';   If the condition is not true. Example: Select teacher_name from teacher where teacher_name NOT like '%h%';   Reference: https://www.javatpoint.com/sql-operators



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