Intro to SQL

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SQL Http://iwt.bz



Structured Query Language


Table: ebooks

ID Publication

Issue Date

1

XML

2011

2

Relational

2011

Algebra


SELECT Statements


SELECT Publication FROM ebooks SELECT ID, Publications, Issue Date FROM ebooks SELECT * FROM ebooks The asterisk will select all columns.


WHERE

Statements


Operator Values = Equal <> Not Equal > Greater Than < Less Than >= Or Equal <= Less than or equal BETWEEN Between an Inclusive Value

LIKE Searches for patterns IN Knowing the exact value you want to get from a column.


SELECT Publication FROM ebooks WHERE Issue Date='2011'

Operator Value


AND &

OR

Operators


The AND operator displays a record if both the frst condition and the second condition is true.


The OR operator displays a record if either the frst condition or the second condition is true.


SELECT publications FROM ebooks WHERE publications='XML' AND date='2011'


The ORDER BY keyword is used to sort the result set.


SELECT * FROM ebooks ORDER BY dates ASC


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