Answer Posted / perumal
1. Primary Key Doesn't allow the NULL values and also
does not allow duplicate values.
2. Primary Key has the Unique Columns.
3. Primary Key Uniquely Identify the each row of the tables.
| Is This Answer Correct ? | 14 Yes | 3 No |
Post New Answer View All Answers
what are the other commands to know the structure of table using mysql commands except explain command? : Sql dba
What is input buffer in sql*plus?
Does truncate require commit?
What is the difference between mdf and ndf files?
What is a dynamic query?
What is sql dialect?
what is the difference between rownum pseudo column and row_number() function? : Sql dba
what is error ora-03113: end-of-file on communication channel?
What is sharding in sql?
How many commands are there in sql?
what is self-join? : Sql dba
What are different joins used in sql?
Which join condition can be specified using on clause?
how to get a list of all tables in a database? : Sql dba
How do you truncate?
