What is the unique index?
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How many joins can you have in sql?
Explain the working of foreign key?
What do you understand by pl/sql records?
write a query to delete similar records in different tables with same structure
What are analytic functions in sql?
How many sql statements are used?
i have one table with accounts and amounts as colums.accounts with columns c and d. and amounts with values 1000,2000,3000 for c and 4000,5000,8000 for d.i need to find the sum of these accounts c and d individually and find the differences between their sum using one select statement.
Is oracel sql developer written in java?
IF i write before / after insert / update trigger and i do rollback what will happen?
how to calcuate the second highest salary of he employee
How does stored procedure reduce network traffic?
What is the default isolation level in sql server? : Transact sql