what are corelated subqueries
Answer / anonymus
In a SQL database query, a correlated subquery (also known as a synchronized subquery) is a subquery (a query nested inside another query) that uses values from the outer query. Because the subquery may be evaluated once for each row processed by the outer query, it can be inefficient.
| Is This Answer Correct ? | 0 Yes | 0 No |
Explain the use of log option in exp command.
24. Display the order number for all orders whose average item cost is greater than the overall average item cost across all orders.
Which Database is the best for the Security issue ? 1. DB2 2.SQL Server 3.MySQL 4.ORACLE
a query to select maxmun 3 salaries of employee table
What is the order of defining local variables and sub procedures/functions?
How to drop an index in oracle?
What is TNS File
What is null value in oracle?
What do you mean by redo log file mirroring?
Explain what are the different type of segments?
Differentiate between post-database commit and post-form commit?
what is the syntax of DROP command?