Where is psql data stored?

406

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Can we modify approve purchase order?if yes what is navigation?

1534

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Can a unique index be created on a column, which contains null?

510

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Does drop table also drop indexes?

426

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Which all languages can be used with mongodb?

5

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What is pl sql collection?

514

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how to restart sql server in single user mode? How to start sql server in minimal configuration mode? : Sql server database administration

451

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What is oracle block? Can two oracle blocks have the same address?

611

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Which Statement would you use to remove the EMPLOYEE_Id_PK PRIMARY KEY constraint and all depending constraints from the EMPLOYEE table?

683

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Why are sql functions used?

609

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What are the differences between hash join, merge join and nested loops?

503

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What is an etl file?

514

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Can a view be mutating? If yes, then how?

563

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what is constraints? Also explain the different types of constraints?

512

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Show the two pl/sql cursor exceptions.

600

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