SQL Tutorials | 01. Intro

Question 1

SQL is a standard _____ for _____ and _____ databases.

Answer 1

SQL is a standard LANGUAGE for ACCESSING and MANIPULATING databases.

Question 2

What does SQL stand for?

Answer 2

SQL stands for Structured Query Language

Question 3

T/F | SQL lets you access and manipulate databases

Answer 3

TRUE

Question 4

T/F | SQL became a standard of the American National Standards Institute (ANSI) in 1987, and of the International Organization for Standardization (ISO) in 1986

Answer 4

FALSE

SQL became a standard of the American National Standards Institute (ANSI) in 1986, and of the International Organization for Standardization (ISO) in 1987

Question 5

What are the 10 things SQL can do?

Answer 5

1. SQL can execute queries against a database
2. SQL can retrieve data from a database
3. SQL can insert records in a database
4. SQL can update records in a database
5. SQL can delete records from a database
6. SQL can create new databases
7. SQL can create new tables in a database
8. SQL can create stored procedures in a database
9. SQL can create views in a database
10. SQL can set permissions on tables, procedures, and views

Question 6

T/F | Although SQL is an ANSI/ISO standard, there are different versions of the SQL language.

Answer 6

TRUE

Question 7

What must different versions of the SQL language need to be compliant with the ANSI standard?

Answer 7

To be compliant with the ANSI standard, they all support at least the major commands (such as SELECT, UPDATE, DELETE, INSERT, WHERE) in a similar manner.

Question 8

T/F | Some of the SQL database programs also have their own proprietary extensions in addition to the SQL standard.

Answer 8

FALSE

MOST (not some) of the SQL database programs also have their own proprietary extensions in addition to the SQL standard!

Question 9

What are the things you need to build a website that shows data from a database?

Answer 9

Using SQL In Your Website

To build a web site that shows data from a database, you will need:

1. An RDBMS database program (i.e. MS Access, SQL Server, MySQL)
2. To use a server-side scripting language, like PHP or ASP
3. To use SQL to get the data you want
4. To use HTML / CSS to style the page

Question 10

What does RDBMS stand for?

Answer 10

RDBMS

Relational Database Management System.

Question 11

Why is RDBMS important?

Answer 11

RDBMS is the basis for SQL, and for all modern database systems such as MS SQL Server, IBM DB2, Oracle, MySQL, and Microsoft Access.

Question 12

What are some modern database systems?

Answer 12

MS SQL Server
IBM DB2
Oracle
MySQL
Microsoft Access.

Question 13

The data in RDBMS is stored where?

Answer 13

In database objects called tables

Question 14

What is the definition of a table in SQL?

Answer 14

A table is a collection of related data entries and it consists of columns and rows.

Question 15

Every table is broken further into what?

Answer 15

Every table is broken up into smaller entities called fields.

Question 16

What is the definition of a field in SQL?

Answer 16

A field is a column in a table that is designed to maintain specific information about every record in the table.

Question 17

What is the definition of a record in SQL?

Answer 17

A record, also called a row, is each individual entry that exists in a table. For example, there are 91 records in the above Customers table. A record is a horizontal entity in a table.

Question 18

What are other names for field?

Answer 18

Column, Attribute (less common)

Question 19

What are other names for record?

Answer 19

Row, Tuple (less common)

Question 20

What is a column in SQL?

Answer 20

A column is a vertical entity in a table that contains all information associated with a specific field in a table.