MySql Stored Procedures Primer Tutorial

MySql Stored Procedures Primer Tutorial

Today’s tutorial follows up on phpMyAdmin interface to MySql and PHP Primer Tutorial in that we again use the brilliant phpMyAdmin to oversee the results of some PHP code which uses MySql calls to create tables called POINT and CIRCLE used to store information defining a circle, and then it creates three MySql stored procedures in the database to help add circle data with the single MySql statement that goes CALL AddCircle(x, y, radius); via the use of those stored procedures. Let’s see below what Wikipedia says about Stored Procedures generally.

A stored procedure is a subroutine available to applications that access a relational database system. A stored procedure (sometimes called a proc, sproc, StoPro, StoredProc, sp or SP) is actually stored in the database data dictionary.

Typical use for stored procedures include data validation (integrated into the database) or access control mechanisms. Furthermore, stored procedures can consolidate and centralize logic that was originally implemented in applications. Extensive or complex processing that requires execution of several SQL statements is moved into stored procedures, and all applications call the procedures. One can use nested stored procedures by executing one stored procedure from within another.

Stored procedures are similar to user-defined functions (UDFs). The major difference is that UDFs can be used like any other expression within SQL statements, whereas stored procedures must be invoked using the CALL statement.[1]

Here is some downloadable PHP programming source code which shows the results of the MySql SQL requests made and can be renamed to ourmysqlstoredprocedure.php as required.

Here is some downloadable supervisory PHP programming source code which gathers the MySql SQL requests made and can be renamed to ourmysql_storedprocedure.php as required.

If you want to develop your own live usage (have provided a live usage link here which will not work but you can use if you are a beginner, to get used to mysql errors, which will occur after you hit either button of the link (these errors indicate bad MySql connection details which are the same reason the database dropdown is not full of options), or you can use this link to see the raw MySql SQL involved in piecing this tutorial together) of these two PHP source codes then you could fix up the hard codings for MySql host/username/password up the top of ourmysql_storeprocedure.php (where you may notice that the default host in the code is localhost:8889 which is the default host string for MySql (ie. port 8889 is used) when using a MAMP (Mac laptop) local web server (which uses localhost:8888 as its local “domain name” for http usage)) or you can keep the same code and use a URL like:

[your-domain-name-plus-a-bit-maybe]/ourmysql_storeprocedure.php?host=[your MySql host address]&username=[your MySql username]&password=[your MySql password]&database=[your optional MySql default database name within the looked up list presented]

Previous phpMyAdmin interface to MySql and PHP Primer Tutorial is relevant and shown below.

phpMyAdmin interface to MySql and PHP Primer Tutorial

You never hear much about the data when you hear about great PHP products, but we
all know it is the data that differentiates the quality of the end result.

That is probably because database products like MySql, SqlServer, Oracle SQL, Advantage and Access
are pretty good at what they do, and emphasise reliability rather than flashiness.

MySql and PHP have a great open source interface with phpMyAdmin, which is so good,
you forget that it is not the default MySql administrator’s interface product.

Let’s have a look at this WordPress database and a bit of how it looks, looking
through the prism of phpMyAdmin …

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If this was interesting you may be interested in this too.