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To delete a particular column in a relation which command is used ?
To delete a particular column in a relation ALTER command is used.
What is a foreign key, and what is it used for? A foreign key is used to establish relationships between relations in the relational model. Technically, a foreign key is a colu
Concatenation operator Example : Printing name and job as one string as column name employees: SELECT ENAME||JOB "EMPLOYEES" FROM EMP;
I need web security expert , website management Project Description: i want professional for the below . website management server management database management
what do you mean by consistency in rdbms?
Describe file organisation? A file is organized logically as a sequence of records. These records are mapped onto disk blocks. A) Fixed-Length Records Type deposit=record
Question: (a) Prepare an ERD for the scenario given below. (b) Convert the ER diagram produced in (a) above into its physical design. You have to choose an appropriate Pri
as a customer service employee, explain five measures you would recommend a displeased student to patronise a school canteen
Hi is anyone well versed in accounting information systems available now to help me work through an important assignment due tomorrow at noon?
What is DML (Data Manipulation Language)? This language that enable user to access or manipulate data as organised by appropriate data model. Procedural DML or Low level: DM
Define the terms i) DDL ii) DML DDL: Data base schema is particular by a set of definitions expressed by a special language known as a data definition language. DML: A data
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