January 2005
Beginner to intermediate
928 pages
22h 14m
English
book
Understanding DB2®: Learning Visually with Examples
by Raul F. Chong, Clara Liu, Sylvia F. Qi, Dwaine R. Snow
Content preview from Understanding DB2®: Learning Visually with Examples
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7.14. Stored Procedures
Stored procedures are programs whose executable binaries reside at the database server. They serve as subroutines to calling applications, and they normally wrap multiple SQL statements with flow logic. Figure 7.27 depicts a situation in which stored procedures are useful.
Figure 7.27. Reducing network traffic by using stored procedures
In the figure, Program 1 and stored procedure mysp execute the same set of SQL statements. Program 1, however, does not perform as well as Program 2 because of the extra overhead of sending each SQL statement through the network and waiting for its return. On the other hand, Program 2 only ...
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