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Why do you go for sorting your query results?
SQL SELECT command to fetch data from MySQL table. Whenever you select rows, the MySQL server is free to return them in any order unless you instruct it or else by stating how to sort the result. However you sort a result set by adding
An ORDER BY section that names column or columns you want to sort by.
Consider the following relational schema: Doctor(DName,Reg_no) Patient(Pname, Disease) Assigned_To (Pname,Dname) Give expression in both Tuple calculus and Domain calculus for
What are audit trails? An audit trail is a log of all alters to the database along with information like which user performed the change and when the alter was performed.
Control as a State Machine Engine First let us define the state machine: "the state machine is a machine which is an object but not an application object. It is a part of lang
Saving Derived Attributes to Avoid Re-computation As discussed, "redundancy means duplication of exact data". But, if multiple copies of same data are present in the system,
Define the basic operations of the relational algebra? Ans: Basic operators of relational algebra are: 1. Union (∪) - Selects tuples which are in either P or Q or in bot
Data Manipulation Language Data manipulation language (DML) describes a set of commands that are used to query and change data within existing schema objects. In this case comm
Explain the two types of participation constraint. Total: The participation of an entity set E in a relationship set R is said to be total if each entity in E participates i
I have to create a database about anything of my choice. It has to contain 4 queries, and 4 forms. It can be anything as simple as a shoe inventory with numbers - is this a service
The functions of DBA ?
WHAT IS DATABASE TECHNOLOGIES
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