Data Manipulation Language in SQL (DML)
SQL language also includes syntax to update, insert, and delete records. These query and update commands together form the Data
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Data Definition Language (DDL) in SQL
The Data Definition Language (DDL) part of SQL permits database tables to be created or deleted. We can also define
Read moreCharacteristics of SQL Commands
Here you can see that SQL commands follow a number of basic rules: • SQL keywords are not normally case
Read moreSQL Commands
There are three groups of commands in SQL: 1. Data Definition 2. Data Manipulation and 3. Transaction Control
Read moreWhat is SQL?
Structured Query Language, commonly abbreviated to SQL and pronounced as “sequel”, is not a conventional computer programming language in the
Read moreThe Entity-Relationship Model
The Entity-Relationship (ER) model was originally proposed by Peter in 1976 as a way to unify the network and relational
Read moreTypes of Database System
Several criteria are normally used to classify DBMSs. The first is the data model on which the DBMS is based.
Read moreDBMS Architecture and Data Independence
Three important characteristics of the database approach are (1) insulation of programs and data (program-data and program-operation independence); (2) support
Read moreDatabase Administrators and Database Users
A primary goal of a database system is to retrieve information from and store new information in the database. People
Read moreData Dictionary
We can define a data dictionary as a DBMS component that stores the definition of data characteristics and relationships. You
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