... procedures and triggers. (See Chapter 14.)
e SQL standard has been updated three times since the
appearance of SQL: 1999 in versions named SQL: 2003,
SQL: 2006, and SQL: 2008. As well as eshing out the ... text les. SQL s XML
features are introduced in Chapter 17.
is book is based on the more recent versions of the SQL
standard (SQL: 2003 through SQL: 2008). However, keep in...
... end.
Chapter 1:
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SQL Clearly
Explained
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... Work
Chapter 1:
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SQL Clearly
Explained
Third Edition
Jan L. Harrington
Please purchase PDF Split-Merge on www.ve...
...
form.tax_year || form.customer_numb
e || operator represents concatenation in most SQL imple-
mentations. It instructs the SQL command processor to view
the two columns as if they were one and to base ... the SQL- 92 syntax
SELECT acct_first_name, acct_last_name,
form.tax_year, form.form_ID
FROM project JOIN form;
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... will be reading about in this
chapter are often referred to as SQL s OLAP (Online Analytical
Processing) functions.
e basic SQL set, or aggregate, functions (summarized in Table
7-1) compute ... unless you resort to the group making
trick shown earlier. e more recent versions of the SQL stan-
dard (from SQL: 2003 onward), however, include a new way
to compute aggregate functions...
... one DBMS. Catalog creation is implementation dependent
and therefore not part of the SQL standard.
Prior to SQL- 92, clusters often represented database les, and the
clustering of objects into ... long. ey are not case sen-
sitive. (In fact, many SQL command processors convert names
to all upper- or lowercase characters before submitting a SQL
statement to a DBMS for processing.)...
... sql_ stuff
WHERE seq_numb = 16;
would extract the document from the row with the sequence
number of 16, convert it to plain text (removing the tags) and
display it on the screen. Because SQL ... test
Note: You could store XML in a text column, tags and all. How-
ever, when you use an XML column, SQL will check the XML to
see that it is well-formed.
e XMLSERIALIZE function is essent...
... > 0
AND P2. month_cnt > 0
AND P0.sin = P1.sin
AND P0.sin = P2. sin
AND P0.pen_year BETWEEN P2. pen_year-59 AND (P2. pen_year -
4)
AND P1.pen_year BETWEEN P0.pen_year AND P2. pen_year
... AS P2
ON P1.sin = P2. sin
INNER JOIN Pensions AS P3
ON P1.sin = P3.sin
WHERE P3.pen_year BETWEEN P1.pen_year
AND P2. pen_year
AND P3.month_cnt > 0
GROUP BY P1.sin, P1.pen_year,...
... are SQL program modules that
are invoked by an application program using the SQL CALL
command. Both triggers and stored procedures are stored as
part of a database.
Writing and
Executing SQL ... Writing and Executing SQL Routines and Modulesx
Note: Support for SQL programming varies considerably from one
DBMS to another. is chapter presents what is documented in
the SQL st...