Which are the most commonly used sql joins?

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What is secondary key?

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How do I count rows in sql?

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What packages are available to pl/sql developers?

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Are left and right joins the same?

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Name the different types of indexes in sql and define them.

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how can we replace the particular column value of a resulted set of executed query? I mean write down a sql query to chane the particular column's value of a resulted set of executed query

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What is rank dense_rank and partition in sql?

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What is the difference between a primary key and a unique key?

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How to use sql*plus built-in timers?

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Do ddl statements need commit?

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What can I use instead of union in sql?

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