SQL Server

1. What is SQL  
2.  how to create database in sql 
3.  how to create table in sql server 
4.  Select Query in sql server
5. SQL Alias or SQL Column Alias or SQL Table Alias 
6. Sql From Clause 
7. Sql Where Clause  
8. Sql Group By Clause  
9. SQL Having Clause 
10. SQL Order By Clause  
11. SQL AND Operator  
12. SQL OR Operator 
13. SQL AND & OR Operator 
14. Deleting Duplicate Records in Sql Server  
15.  how to filter for sql null or empty string
16.  how to filter for sql is not null or not empty string 
17.