November 2008
Intermediate to advanced
592 pages
20h 13m
English
Content preview from Introduction to Database Systems
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CHAPTER 5
STRUCTURED QUERY LANGUAGE
After reading this chapter, the reader will understand:
- The basic features of SQL
- The concept of schema and catalog in SQL
- Different types of data types available in SQL
- DDL commands to create relations in SQL
- Various constraints that can be applied on the attributes of a relation
- DDL commands to alter the structure of a relation
- DML commands to manipulate the data stored in the database
- Various clauses of
SELECTcommand that can be used to extract data from database - Various set operations like union, intersect, and minus
- The use of
INSERT,UPDATE, andDELETEcommands to insert, update, and delete tuples in a relation - Searching of null values in a relation
- The use of various aggregate function in select query ...
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