What is pragma in pl sql?
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What normalization means?
Why query optimization is needed?
What is sql catalog?
Why join is faster than subquery?
i have table T!. A B C D NULL 1 2 3 4 NULL 5 6 7 8 NULL 9 10 11 12 NULL. I WANT COUNT OF NULL VALUES IN TABLE. WRITE A QUERY.
can we delete the trigger in a view? if yes why if not why?
What are local and global variables and their differences?
wht is the difference between sqlaserver2000 and 2005
How to change a value of the field ‘salary’ as 7500 for an employee_name ‘john’ in a table employee_details?
explain the delete statements in sql
What are the basic techniques of indexing?
what is the forward decleration in packages?
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