PowerPoint Presentation on SQL (PPT File)






PowerPoint Presentation Content Sample:

 

IBM Sequel language developed as part of System R project at the IBM San Jose Research Laboratory
Renamed Structured Query Language (SQL)
ANSI and ISO standard SQL:
SQL-86
SQL-89
SQL-92
SQL:1999 (language name became Y2K compliant!)
SQL:2003
Commercial systems offer most, if not all, SQL-92 features, plus varying feature sets from later standards and special proprietary features. 
Not all examples here may work on your particular system.
 

Allows the specification of not only a set of relations but also information about each relation, including:

The schema for each relation.
The domain of values associated with each attribute.
Integrity constraints
The set of indices to be maintained for each relations.
Security and authorization information for each relation.
The physical storage structure of each relation on disk.

 

Types

char(n).  Fixed length character string, with user-specified length n.
varchar(n).  Variable length character strings, with user-specified maximum length n.
int.  Integer (a finite subset of the integers that is machine-dependent).
numeric(p,d).  Fixed point number, with user-specified precision of p digits, with n digits to the right of decimal point.
real, double precision.  Floating point and double-precision floating point numbers, with machine-dependent precision.
float(n).  Floating point number, with user-specified precision of at least n digits.

DDL

The schema for each relation.
The domain of values associated with each attribute.
Integrity constraints
The set of indices to be maintained for each relations.
Security and authorization information for each relation.
The physical storage structure of each relation on disk.
 
 
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Download PowerPoint Presentation on SQL.PPT


PowerPoint Presentation on SQL (PPT File)
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Further Reading:
http://en.wikipedia.org/wiki/Powerpoint
http://en.wikipedia.org/wiki/Sql
http://en.wikipedia.org/wiki/Ppt

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Posted by: Prateek on June 10, 2014


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