The target file will be named something like "mysql-connector-java-x. NOTE: In Windows systems, double-clicking a zipped file usually gives access to the contents of the zip file, whereupon you may select from the resulting explorer window "Extract Files. Next, make OOo aware of the newly downloaded java archive. Start OpenOffice. Click on the button Class Path Click on the mysql-connector-x. The mysql-connector-x. Click on OK to close the dialog.
Finally, restart OOo and check functionality. Close OpenOffice. Restart OpenOffice. Obtain mysql-connector-odbc from the MySQL website and install it on your system. Server: localhost in case mysql server is installed on the local machine, or IP Address if it's on network machine.
You should be able to see mysql databases under Database drop-down list, choose one. Click OK. Click on Next. Unpack, untar or unzip the downloaded file anywhere where you can access it as a normal user, for example, to your desktop. A directory is created at the desired location named mysql-connector-java-x.
Inside this directory, you will find a file called mysql-connector-x. Version 1. An automatic backup file is also maintained if enabled. The end-user can supplement these measures by storing the database files in a folder protected by automatic backup software or cloud-sync services.
It's also prudent to run database applications on a computer protected by an 'uninterruptable power supply' UPS or on a laptop with the battery installed. These measures avoid loss rollback of any buffered data in the event of a power failure. Speaking of buffered data, all transactional database engines employ a write-delay buffer to enhance performance. The buffer can be set to 0 seconds at the expense of write performance.
HSQLDB uses a modest ms buffer by default, so new data is safely written to disk after a half-second delay. Base sets this write-delay buffer to 60 seconds for all 'embedded databases' files, which is excessive, but most folks can recover from the loss of one minute's productivity in the event of a power failure or similar event.
In all cases, buffered data is written immediately to disk upon normal shutdown. In Base parlance, an 'embedded database' is a single-file database. Specifically, this refers to the inclusion of both front-end and back-end database components within a single, zip-archive file. So with Base, an 'embedded database' is simply a zip-archive file. The contents of this. The first signs of a corrupted Base. In many cases the file is recoverable through tedious manual recovery.
But much like recovering a crashed hard-drive, the process requires some expertise with file-recovery tools and knowledge of HSQLDB's automatic backup system. So it's best to avoid these 'embedded database' files whenever possible. This means avoiding the wizard dubbed ' Create a new database ' in Base.
In fact, Base offers a robust alternative to leveraging the ' Connect to an existing database ' wizard. The wizard connects Base to various data-sources in a traditional ' split database ' architecture. In this configuration the database files remain separate. The Base. The back-end database files are managed exclusively by their respective driver or database engine.
Due to the separation of roles at the file-level, a Base crash cannot corrupt the back-end database files. But manual setup is tedious, and the resulting database is scarcely portable. In response, the user-community developed macro-enhanced Base templates. But understand that these two methods are mutually exclusive. A macro-enhanced Base template. These templates do not require manual Class Path setup as outlined below.
The templates use a macro-derived 'session' Class Path as opposed to a manually-setup 'global' Class Path. So unless you're running a split HSQL database in server-mode multi-user support , there's no good reason to setup the global Class Path manually in Base. In fact, a global Class Path has the potential to corrupt your legacy 'embedded database'. Click OK. In the DataPilot table, cells containing Datetime fields are marked as " empty ".
See instance at:. Calculated fields derive their values from data that exists elsewhere in the database. The example query in this section uses a calculated field to work out the total value of each order in the Northwind Orders table.
The calculated field does this by multiplying the Quantity column value by the UnitPrice column value. The calculation produces a value in the query result set that is derived from but not stored in the database table.
The Alias cell lets you change the default column heading that displays when you retrieve the query data in Base and other OpenOffice applications. By default, OpenOffice displays the formula value "Order Details". Criterion fields let you place restrictions on a query to help you find specific records that you want to work with. For example, instead of retrieving all orders received, you can create a criterion field that retrieves orders received in a particular month.
This section shows how to use a criterion field with an external ODBC data source to filter Northwind orders by month.
OpenOffice automatically delimits each date with hash characters, which the Criterion field syntax requires. The filtered query results display in the upper pane.
You many need to change the OrderDate column format. To do this, right-click the OrderDate column heading and choose Column Format. In the format code box, type:. Base lets you sort result set data on a particular column and choose whether the query results display in ascending or descending order. This example query shows the total value of the orders taken by each Northwind sales rep.
To rank the employees, the query sorts the records by order amount and displays the records in descending order. The larger the order amount, the earlier the employee displays in the query results. The example form is based around the Northwind Products table.
To enable users to choose from a predefined list of supplier IDs and category IDs when entering data, change the form controls for these fields to list boxes that retrieve the available IDs. You can also ensure that a form field value falls within a specific range. For example, if the unit price for a product is never above , you can prevent prices above this value from being entered.
In the Value maximum box, type "". Note that although this method prevents values that are outside the range from being entered, OpenOffice does not prompt for a valid value. Instead, OpenOffice sets the value to the maximum permitted by the range.
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