MySql – Insert
Inserting rows into MySql can be done in a couple of ways. You can use the INSERT…VALUES and INSERT…SET commands.
MySql
MySql is the worlds second most popular database engine (July 2013) and its open source. It is based on SQL (Sequential Query Language). Unlike MS Access it does not run as a stand-alone application. It runs as a background service on a computer (typically called ‘a server’) and you connect to it using a username and password. Once you have connected to the MySql server you can query it using SQL or Structured Query Language. The server will respond with the results of your query.
MySql – Create Database
If you need to create a database via the command line (or through the MYSQL prompt in PHPMyAdmin) then you can use the following where dynamo is the name of the database you wish to create. See W3Schools/Create DB for more information.
CREATE DATABASE dynamo;
MySQL – Create Table
The process and command for creating a table in MySql are similar to that for a database. You will need to make decisions about data types and key fields. Detailed information on creating tables is available at W3Schools/Create Table.
MySql – Feedback
Getting helpful feedback from MySQL when it errors is possible if you use the following:
mysql_query($sql) or die('Some useful message:' . mysql_error() );
MySql – Relationships
Dealing with relationships in MySql is not as straightforward as either MS Access or as you would have hoped for. Creating simple primary keys isn’t too difficult
MySql – Connections
Connecting to the MySql database via PHP is done through the CONNECT functions.
MySql – Select
SELECTING DATA
To grab a bunch of data from an SQL database you need to write a SELECT query.
MySql – Delete
If you need to delete a row you can use the DELETE
command with a WHERE
clause dictating which ones:
DELETE FROMtbl_name
WHEREfieldx
= "X";
Example
DELETE FROMcriminals
WHEREcrime
= "Arson";