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Describe DROP TABLE command of SQL along with both the options - CASCADE and RESTRICT.
DROP TABLE command - This command drops the specified table. Dropping a table also drops indexes and grants related with it. Objects built on dropped tables are marked invalid and cease to work.
CASCADE and RESTRICT options - The DROP TABLE with RESTRICT option destroy the table unless a few view or integrity constraint refer to the given table; if so, the command fails. Other than along with the CASCADE option, any referencing views or integrity constraints are (recursively) dropped as well.
Can you help me with the following: Drop statements for all objects in the lab project. Create statements for all objects of the lab project Create indexes for foreign keys Cre
What is the use of a slotted-page structure and what is the information are there in the header? The slotted-page structure is used for organizing records within a one block.
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Whst is logical schema ? Logical schema is the entire database.
Define instance and schema? Instance: Collection of data kept in the data base at a particular moment is known as an Instance of the database. Schema: The o
explain various steps uses in evaluation and maintenance of MIS.
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What is a PROJECT operation? The project operation is a unary operation that returns its argument relation with particular attributes left out. Projection is shown by pie (π).
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