How subquery works in sql?


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More SQL PLSQL Interview Questions

Is null operator in sql?

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Explain two virtual tables available at the time of database trigger execution.

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How would you hide a table in sql. ie the table can be only visible to its maker?

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What is trigger types in sql?

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How to add a column ‘salary’ to a table employee_details?

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How do I view tables in sql developer?

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one of the column in my table contains the data like SAL ---- 1000 1000 2000 3000 3000 So my requirement is i want output like SAL --- 1000 2000 3000 it mean i want to delete duplicate rows only how should u write query?

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Enlist some predefined exceptions?

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What is sql mysql pl sql oracle?

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What is a merge query?

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how to create a database in oracle?please gve anser with example

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What is mdb stand for?

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