What Is Constrains In Oracle SQL With Example |what is datatypes in Oracle SQL With Example SQL #SQL

Chapters
0:00 Introduction
0:13 Datatype
0:30 Example of datatypes
1:11 How many datatypes and what they are
1:20 String datatype in SQL
2:11 What is difference between varchar1 and varchar2
2:47 what is nchar and nvarchar
3:50 Example for String datatypes and Nchar and NVarchar
4:53 What is number datatype in SQL
5:34 What is date datatype in SQL
5:58 What is data large object
6:14 what is Constrains in SQL
6:52 Example for constrains in SQL
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