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Explain DML with some examples?
DML - Data Manipulation Language: statements used for managing data within schema objects. Some examples:• SELECT - retrieve data from the a database• INSERT - insert data into a table• UPDATE - updates existing data within a table• DELETE - deletes all records from a table, the space for the records remain• MERGE - UPSERT operation (insert or update)• CALL - call a PL/SQL or Java subprogram• EXPLAIN PLAN - explain access path to data
Drawbacks of Data Distribution: The primary drawbacks of distributed database systems are the added complexity needed to ensure proper coordination between the sites. This increas
What is entity in DBMS? Entity: A DBMS entity is either a thing in the modelled world or a drawing element in an ERD.
Database Administrator One of the main perpose for having the database management system is to have control of both data or programs accessing that data. The person having li
Hi there, Have an issue with my Database. I have: TblOrderDetails and FmOrderDetails TblCircuit and FmCircuit Whenever I add data into the Form, it will update the table as expect
Which is a valid SQL type? A valid SQL Should be in CHARACTER it is should be NUMERIC and FLOAT.
What is Candidate Key Super Key or Candidate Key: It is such an attribute of a table that can uniquely recognize a row in a table. Generally they have unique values and can n
what is 3nf
PRINCIPLES OF DATABASE 1. State the following terms: a) Database b) Database Management System c) Entity d) Attribute e) Relationship 2. Discuss the Three Level Architecture
Example RELATION SCHEMA for STUDENT: STUDENT (Roll No: string, name: string, login: string, age: integer) RELATION INSTANCE
We face problem of stock Opening balance and closing balance in Minus
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