Interested to Buy Any Domain ? << Click Here >> for more details...
What is a pseudo key? What is its use???
- 2 Answers
- 18935 Views
- Mphasis, I also Faced
- E-Mail Answers
Answers were Sorted based on User's Feedback
Answer / tdguy
If a table in a database either has no natural key or the
natural key is so long that using it as the key would be
inefficient then we need to consider using a pseudokey
instead. Pseudokeys are usually given the same name as the
table they belong to with _id added to the end of the name.
They usually are defined to contain a number and use
autoincrement in mySQL or the equivalent in other versions
of SQL to dynamically allocate a value when new rows are
created.
source: http://www.felgall.com/mysql04.htm
| Is This Answer Correct ? | 6 Yes | 0 No |
Answer / guest
it is used in locks the rowhash
best to tell EXPLAIN in this explanation we locks pseudo key
then it start
| Is This Answer Correct ? | 0 Yes | 10 No |
Explain the most common data types used in teradata?
How to view every column and the columns contained in indexes in teradata?
Can we collect statistics on multiple columns?
What is the use of fallback?
Explain the term 'tables' related to relational database management system?
Explain the types of join supports by teradata?
Syntax for case when statement?
Did you write stored procedures in teradata?
How do you eliminate duplicates?
What is the use of having index's on table?
What interface is used to connect to windows based applications?
What does Amp contain and what are all the operations that it performs?
Teradata 
