100% satisfaction guarantee Immediately available after payment Both online and in PDF No strings attached
logo-home
Previously searched by you
Previously searched by you
logo
A Guide to Advanced SQL - Microsoft Access R100,00   Add to cart
Quickly navigate to
Preview
  2.  
  3. 12th Grade
  4.  
  5. Computer Literacy

Interview

A Guide to Advanced SQL - Microsoft Access
 45 views  1 purchase

A comprehensive summary of Advanced SQL content at a Grade 12 Level. It contains all the necessary information in a colourful, table format. All information has been typed for improved legibility.

Preview 2 out of 8  pages

Document information

  • March 11, 2022
  • 8
  • 2021/2022
  • Interview
  • Unknown
  • Unknown

Subjects

Connected book

book image

Book Title:

Author(s):

  • Edition:
  • ISBN:
  • Edition:

More summaries for

All for this textbook (3)

Written for

All documents for this subject (115)

Seller

avatar-seller
Zeyni

Reviews received

Content preview

1

, 2




1. General Form of a SQL SELECT Statement


SELECT TOP <n> <field(s)>
FROM <tableName(s)>
WHERE <condition(s)>
GROUP BY <expression>
HAVING <condition>
ORDER BY <expression>

SELECT Extracts data from the table (Fields that need to be displayed)

TOP <n> Limits the number of rows displayed in a table

FROM Found in the specified table(s)

WHERE ● Will select all records where the field(s) condition(s) are met
<condition> ● Condition can consist of any Boolean condition, using any number of fields
● A field value can be compared to a value, but not to an aggregate
The condition always consists of:
● A field name, followed by a relational operator, then a comparison value

GROUP BY Provides the result of a (function) for each (category) of rows
<expression> Used to assign values to a specific field - keyword ‘each’

HAVING Removes rows from a GROUP BY Result Set
<condition> (Same way as a WHERE clause, but is used for aggregate functions → COUNT( ),
SUM( ) etc.)

ORDER BY Ranks selected fields only, in order of the fields entered (field1 before field2)
<expression>



Whenever there is a primary / foreign key in one table that links to a foreign key (a primary key in
another table) a relationship exists between the two tables and we can perform queries that make use
of that relationship to combine data from both tables

The primary / foreign key relationships that exist in this database are:

● ActNum primary key in tblActs links to the foreign key ActNum in tblEntrants
- the relationship is one-to-many, where one act may have many entrants

● ActNum primary key in tblActs links to the foreign key ActNum in tblPoints
- the relationship is one-to-one, meaning that one act has one set of points

When there is a one-to-one relationship between primary keys of two tables, the primary key of each
table is considered to be a foreign key in the other table




2

The benefits of buying summaries with Stuvia:

Guaranteed quality through customer reviews

Guaranteed quality through customer reviews

Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.

Quick and easy check-out

Quick and easy check-out

You can quickly pay through EFT, credit card or Stuvia-credit for the summaries. There is no membership needed.

Focus on what matters

Focus on what matters

Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!

Frequently asked questions

What do I get when I buy this document?

You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.

Satisfaction guarantee: how does it work?

Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.

Who am I buying this summary from?

Stuvia is a marketplace, so you are not buying this document from us, but from seller Zeyni. Stuvia facilitates payment to the seller.

Will I be stuck with a subscription?

No, you only buy this summary for R100,00. You're not tied to anything after your purchase.

Can Stuvia be trusted?

4.6 stars on Google & Trustpilot (+1000 reviews)

60434 documents were sold in the last 30 days

Founded in 2010, the go-to place to buy summaries for 14 years now

Start selling
R100,00  1x  sold
  • (0)
  Buy now