Why query optimization is needed?
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How will you select unique values from a list of records?
how many columns can be used for creating index? : Sql dba
Explain how can you save or place your msg in a table?
What is the benefit of foreign key?
How many indexes can be created on a table in sql?
How do I save a stored procedure?
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.
in procedure how to return a value
What is difference between joins and union?
What are triggers, and when would you use them?
Mention what is the plv (pl/vision) package offers?
What are the operators in sql?
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