Assignment: NURS 655 What are the basic characteristics of Structured Query Language

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Assignment: NURS 655 What are the basic characteristics of Structured Query Language

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Question 2

What are the basic characteristics of Structured Query Language (SQL)?

SQL is a stand-alone application

SQL is a data manipulation language

SQL is a nonprocedural language

SQL is a complex language that requires in-depth education to learn

Unsaved change Moving to the next question prevents changes to this answer.

Question 3

What kind of design philosophy is used when attributes are first defined then grouped to form entities?

Bottom-up

Decentralized

Top-down

Centralized

Question 4

What makes data meaningful in a database?

Defined and applied business rules

Application design and implementation

Data integrity

Characteristics of the data elements

Question 5

What two tasks must be completed before using a relational database management system?

Create the database structure

Enter preliminary data into the database

Apply the rules of precedence to the data

Create the tables that will hold end-user data

Structured Query Language (SQL) is the standard language used for writing queries in a databases. It was approved by ISO (International Standard Organization) and ANSI(American National Standards Institute).

SQL contains of some important features and they are:

Data Definition language (DDL):
It contains of commands which defines the data. The commands are:create: It is used to create a table.
Syntax:
```
create table 
tablename(attribute1 datatype......attributen datatype);
```
drop: It is used to delete the table including all the attributes.
Syntax:
```
drop table tablename;
```
alter: alter is a reserve word which modifies the structure of the table.
Syntax:
```
alter table 
tablename add(new column1 datatype......new columnx datatype);
```
rename: A table name can be changed using the reserver ‘rename’
Syntax:
```
rename old table name to new table name;
```
Data Manipulation Language (DML):
Data Manipulation Language contains commands used to manipulate the data.
The commands are:insert: This command is generally used after the create command to insert a set of values into the table.
Syntax:
```
insert into tablename values(attribute1 datatype);
:
:
:
insert into tablename values (attributen datatype);
```
delete: A command used to delete particular tuples or rows or cardinality from the table.
Syntax:
```
delete from tablename where condition;
```
update: It updates the tupples in a table.
Syntax:
```
update tablename set tupplename='attributename';
```
Triggers:
Triggers are actions performed when certain conditions are met on the data.A trigger contains of three parts.
- (i). event – The change in the database that activates the trigger is event.
- (ii). condition – A query or test that is run when the trigger is activated.
- (iii). action – A procedure that is executed when trigger is activated and the condition met is true.
Client server execution and remote database access:
Client server technology maintains a many to one relationship of clients(many) and server(one). We have commands in SQL that control how a client application can access the database over a network.
Security and authentication:
SQL provides a mechanism to control the database meaning it makes sure that only the particular details of the database is to be shown the user and the original database is secured by DBMS.
Embedded SQL:
SQL provides the feature of embedding host languages such as C, COBOL, Java for query from their language at runtime.
Transaction Control Language:
Transactions are an important element of DBMS and to control the transactions, TCL is used which has commands like commit, rollback and savepoint.commit: It saves the database at any point whenever database is consistent.
Syntax:
```
commit;
```
rollback: It rollbacks/undo to the previous point of the transaction.

Assignment NURS 655 What are the basic characteristics of Structured Query Language

Syntax:
```
rollback;
```
savepoint: It goes back to the previous transaction without going back to the entire transaction.
Syntax:
```
savepoint;
```
Advanced SQL:
The current features include OOP ones like recursive queries, decision supporting queries and also query supporting areas like data mining, spatial data and XML(Xtensible Markup Language).

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I understand this is a lot of information to cover in 5 weeks, however, the Bible says in Philippians 4:13 that we can do all things through Christ that strengthens us. Even in times like this, we are encouraged by God’s word that we have that ability in us to succeed with His strength. I pray that each and every one of you receives strength for this course and life generally as we navigate through this pandemic that is shaking our world today. Relax and enjoy the course!

Hi Class,

Please read through the following information on writing a Discussion question response and participation posts.

Contact me if you have any questions.

Important information on Writing a Discussion Question

Your response needs to be a minimum of 150 words (not including your list of references)
There needs to be at least TWO references with ONE being a peer reviewed professional journal article.
Include in-text citations in your response
Do not include quotes—instead summarize and paraphrase the information
Follow APA-7th edition
Points will be deducted if the above is not followed

Participation –replies to your classmates or instructor

A minimum of 6 responses per week, on at least 3 days of the week.
Each response needs at least ONE reference with citations—best if it is a peer reviewed journal article
Each response needs to be at least 75 words in length (does not include your list of references)
Responses need to be substantive by bringing information to the discussion or further enhance the discussion. Responses of “I agree” or “great post” does not count for the word count.
Follow APA 7th edition
Points will be deducted if the above is not followed
Remember to use and follow APA-7th edition for all weekly assignments, discussion questions, and participation points.
Here are some helpful links
Student paper example
Citing Sources
The Writing Center is a great resource

Assignment: NURS 655 What are the basic characteristics of Structured Query Language