WHAT IS SQL?

-

 Blogspot #5

A. Engage

What is SQL?

- SQL, which stands for Structured Query Language, is a widely-used language for managing relational databases. It enables businesses and organizations to manipulate large amounts of data efficiently by creating, updating, deleting, retrieving, and manipulating data stored in tables. SQL is a declarative language, which means that users specify what they want to do with the data, and the database system determines how to carry out the task. In addition to creating and modifying database structures like tables and indexes, SQL provides a wide range of querying capabilities, such as searching for specific data, aggregating data, and joining multiple tables. Because SQL is supported by many relational database management systems and has a standardized syntax, it facilitates data and command transfer between different database systems.


B. Explore and Explain


1. What are some SQL commands?

- CREATE DATABASE, SELECT, UPDATE, DELETE, INSERT INTO, DROP INDEX, CREATE INDEX, DROP TABLE, ALTER TABLE, CREATE TABLE.


2. What is the difference between drop and delete command?

- In a database, the DELETE command removes one or multiple records from a table. On the other hand, the DROP command eliminates the entire table from the database.


C. ELABORATE & EVALUATION

SELECT 1. Extracts data from a database.

INSERT INTO 2. Inserts new data into a database.

ALTER TABLE 3. Modifies a table.

SQL 4. A standard language for accessing and manipulating databases.

GRANT AND REVOKE 5. Can set permissions on tables, procedures, and views.

Comments

Post a Comment

Popular posts from this blog

Function, Advantages, Disadvantages of DBMS

-
Image
 Blogpost #2 A. Engage (a) Functions of DBMS Data Definition -  The DBMS must be able to accept data definitions in source form and convert to the appropriate object form.  Data Manipulation -  The DBMS must be able to handle request from the user to retrieve and possibly update existing data in the database, or to add a new data to the database. Data Security and Integrity - The DBMS must be able to monitor user requests and reject any attempts to violate the security and integrity checks defined by the database administrator. Data Recovery and Concurrency -  The DBMS must have the capability of recover from or minimize the effects of a system crash. Data Dictionary -  The DBMS must provide a system database called the database dictionary. The Main function of a DBMS it organizes your database files and provides end users more access and control over their data.  (b) Advantages of DBMS DATA INTEGRITY  - Since a single copy of a particular...
Read more

Introduction To SQL

-
Image
 Blogpost #4 A. Engage  a. DATA DEFINITION LANGUAGE - Data definition language is a language for describing data and how it relates to other data in the database. b. INTERACTIVE DATA MANIPULATION LANGUAGE  - IDML is a programming language used for manipulating data in a database, where users can directly interact and modify data in real-time. c. EMBEDDED DATA MANIPULATION LANGUAGE - EDML is a programming language that is integrated into software applications to help users manipulate database data within the application. With EDML, users can easily perform data manipulation tasks without having to leave the application interface. B. EXPLORE & EXPLAIN 1. What are the basic SQL expression? ·         SELECT: Used to retrieve data from a database table ·         INSERT: Used to add new records to a database table ·         UPDATE: Used to modify e...
Read more

Information Management 1 Class Experience

-
Image
  Blogpost #1 The first week our teacher gave us an overview on the topics and what will do in her class and I'm looking forward to learning more to this subject. Every Wednesday and Thursday I take my Information Management classes, at first, I thought this subject wouldn't be interesting but a couple of weeks later I learned a lot about databases and how they work and the reason why databases is needed. During my classes I've learned a lot about data and information and what are their differences and also, I've learned about concepts and DBMS and its components and more. I've learned a lot for the past 4 weeks, so I must say the subject is hard, but I think I can handle it for the next few months.
Read more