Interested to Buy Any Domain ? << Click Here >> for more details...
What is a pseudo key? What is its use???
- 2 Answers
- 18868 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 |
What are tpump utility limitations?
what is the difference between bpo and call centre?
What are the commands to make a new table, change a table and remove a table in teradata?
Please tell me a query to find the Primary key,Foreign key,primary Index,PPI for the Database?
What do you mean by teradata intelliflex?
How to Skip or Get first and Last Record from Flat File through MultiLoad and TPUMP Utility?
What are the differences between TerdataV2R5 and V12 Versions please??
In general, how do you optimze any sql in teradata?
What is a level of granularity of a fact table?
Highlight a few of the important components of Teradata?
How to handle nulls in Teradata??? How many columns can be there in a table??? How to find average sal with out using avg function????
What is dimensional modeling?
Teradata 
