What's a Stored Function If procedural programming is new to you, you may be wondering what the difference is between a Stored Procedure and a Stored Function. The next two examples are not ideal use of functions (in their current format they would more ideally be stored procedures), as we are not interested in the result being returned, and only want to manipulate the data, but they show you some of the potential power of functions
USing nested if then else in Stored procedure
- 2014 EE Annual Survey EXPERT WHO ANSWERED Anthony Perkins Anthony Perkins has answered 8,279 questions on Experts Exchange and is an expert in MS SQL Server, MS SQL Server 2005 and MS SQL Server 2008
http://javarevisited.blogspot.com/2013/02/-create-and-call-mysql-stored-procedure-database-sql-example-tutorial.htmlIn last couple of MySQL tutorial we have seen How to find second highest salary and How to join 3 tables in one query; In this MySQL tutorial we will see couple of examples of creating stored procedure and calling stored procedure using IN and OUT parameters
Once procedure get loaded into db, you may uncomment some of the lines to debug through! Cheers, Kedar Reply sneha - January 17, 2012 at 10:55 am Thanks guys, this code worked great. your procedure is very useful in my project to build the delivery packing list, piking up the list of magazine numbers subscribed from a comma-separated list
Procedures that are NOT DETERMINISTIC have implications for binary logging and replication (if it performs updates, it means that slave data could be different to master data, and for this reason you can't define a NOT DETERMINISTIC procedure if binary logging is enabled)
MySQL Stored Procedure - w3resource
Go Top Tools to create MySQL ProcedureYou can write a procedure in MySQL command line tool or you can use MySQL workbench which is an excellent front-end tool (here we have used version 5.3 CE). Go Top Variables in Stored ProgramsSystem variables and user-defined variables can be used in stored programs, just as they can be used outside stored-program context
But at the end, the limit option in that query causes it to return an empty result set because the offset is greater than result set and rows to return is one. @z was initialized and used previously, what status does it have when assigned an empty result set as it's value? Is there a command like the PHP isset() function SOLUTION: The comment by @a1ex07 had a fix
The first stored procedure I attempted to write accepted 3 parameters and based on one of them checks a lookup table, and creates a new value in it if the same value does not already exist
MySQL :: MySQL 5.0 Reference Manual :: 13.1.9 CREATE PROCEDURE and CREATE FUNCTION Syntax
As of MySQL 5.0.18, the handles the data type of a routine parameter, local routine variable created with DECLARE, or function return value as follows: Assignments are checked for data type mismatches and overflow. If there is no such attribute, as of MySQL 5.0.25, the database character set and collation that are in effect at the time the server loads the routine into the routine cache are used
MySQL :: MySQL 5.0 Reference Manual :: 18.2 Using Stored Routines (Procedures and Functions)
Stored routines can be particularly useful in certain situations: When multiple client applications are written in different languages or work on different platforms, but need to perform the same database operations. The tradeoff is that this does increase the load on the database server because more of the work is done on the server side and less is done on the client (application) side
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