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ALTER TABLE Command: This command is used for variation of existing structure of the table in the given situation:
Syntax
ALTER TABLE
You require to put many constraints like that the database integrity is not compromised.
I need help in doing my dbms project
Benefits and Limitations od Data Models?
Which model is record based logical model? Network Modelis basically known as record based logical model.
tell me the functionality,advantages and disadvantages of student database
Write short note on Data models? Data models: A data model is an abstract model which elaborates how data is represented and accessed. The term data model has two commonly ac
Discuss the count function? The COUNT function used returns the number of tuples or values fixed in a query. The count function comprises two types of syntax: (1) COUNT (*)
What is a block and a block number? A block is a contiguous sequence of sectors from a single track of one platter. Every request specifies the address on the disk to be refere
What is an entity relationship model? The entity relationship model is a collection of basic objects known as entities and relationship between those objects. An
When a function module is activated syntax checking is performed automatically. YEs, a function module is activated syntax checking.
What are the purpose for having variable length records? What kinds of separator characters are required for each? Variable-Length Records - Variable-length records are thos
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