This class can execute general purpose MySQL queries using PDO.

It can connect to a given MySQL database server using PDO and executes several types of SQL queries. Currently it can:

- Insert, update and delete table records with given values
- Execute arbitrary prepared queries
- Execute queries and return results in arrays or objects
- Get the last inserted table record identifier
- Check if a given table record exists with a given column value
- Disable foreign key check
- Get the average, sum, maximum or minimum value of a given table column
- Retrieve the column values of a given table
- Retrieve table records as key value-pair associative arrays
- Get a single value of a given table record
- Get a given table column list
- Get a given database tables list