Why is there a performance difference between two similar queries where one uses union and the other uses union all?
- 0 Answers
- 516 Views
- I also Faced
- E-Mail Answers
No Answer is Posted For this Question
Be the First to Post Answer
What is the disadvantage of using subquery exact after a select statement?ex. select (select * from sometable)
Name three version of sql server 2000 and also their differences?
Why do you want to join software field as you have done your BE in Electronics?
How can you append an identity column to a temporary table?
explain different types of cursors? : Sql server database administration
What is stored procedures?
When would you use sql joins?
find the 3rd max salary
What would be the Expected Salary For SQL Server Developer for 3 years exp. as per indian market?
How to view the error log for any specific instance? : sql server database administration
What is the difference between system objects and user objects?
What do you understand by the analysis services in sql server?
-
Oracle (3239) - SQL Server (4518)
- MS Access (429)
- MySQL (1402)
- Postgre (483)
- Sybase (267)
- DB Architecture (141)
- DB Administration (291)
- DB Development (113)
- SQL PLSQL (3312)
- MongoDB (502)
- IBM Informix (50)
- Neo4j (82)
- InfluxDB (0)
- Apache CouchDB (44)
- Firebird (5)
- Database Management (1391)
- Databases AllOther (288)
