What is a self join? Explain it with an example?
- 16 Answers
- 58461 Views
- TCS, I also Faced
- E-Mail Answers
Answer Posted / nishant dubey
Table join itself using alias..
example
Select N,emp_id,N.emp_name,D.emp_id,D.emp_name from Nishant
N,Nishant D where N.emp_id=D.emp_id;
| Is This Answer Correct ? | 11 Yes | 19 No |
Post New Answer View All Answers
Explain about the hierarchical model of the database?
How to use online Backups?
How to combine two function together?
A) Which two are benefits of Teradata's support for ANSI Standard SQL? (Choose two.) 1.data is distributed automatically 2.queries get optimized to better plans 3.submit queries from other database systems 4.can interface with BI tools B) Which statement is true when comparing the advantages of third normal form to star schema? 1.Star schema tends to have fewer entities. 2.Star schema requires additional data storage. 3.Third normal form tends to have fewer entities. 4.Third normal form requires additional data storage. C)Which two sets of functions does the Parsing Engine (PE) perform? (Select two.) 1.sorting, formatting, and aggregating of the final answer set 2.flow control of the data to and from the participating tables 3.SQL statement interpretation, syntax validation, and semantic evaluation 4.dispatching the step execution sequence to the AMP via the BYNET D) Which two can be achieved with Teradata Active System Management (TASM)? (Choose two.) 1.disable hardware 2.react to hardware failure 3.influence response times 4.collect metadata E) Which three mechanisms can be used to ensure security within the Teradata Database? (Choose three.) 1.views 2.spool limits 3.roles 4.access rights 5.profiles
Explain the rollup operator?
Explain the role of indexing in databases?
On friday, you issued several insert statements using query analyzer. You then verified the data had been correctly entered with a select statement on monday, your users report that the data is not there what happened?
How to replace not in with not exist?
Explain about a primary key?
What are data modelling techniques?
How to generate OIDS
Explain the process of the user request and data generating?
What is DB Development software?
How can I detect whether a given connection is blocked?
How can you fix a poorly performing query?
