What is sql and how does it work?
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Can we join tables without foreign key?
how to retrieve the top 3 salaries of the table using rownum
How many row comparison operators are used while working with a subquery?
What is faster join or subquery?
How to convert ms-excel file to oracle table?
Can primary key be changed?
What is a cursor ? Why Cursor is required ?
What is cascade in sql?
How long will it take to learn pl sql?
What are the different types of database management systems?
How to make a copy values from one column to another in sql?
what is External tables? explain with examples
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