How to Work with Processes > Working with the Remote Database Processes Group

Process Purpose

The "Delete Record(s)" process is used to delete records from the tables of a remote database in a specific host.

The remote database profile you create within MCL-Designer V4 is responsible for the direct communication between your MCL-Designer project and a remote database.

Once the project is loaded into a device, that same profile can be used to allow communication between the device and the remote database/host server, via MCL-Net. Therefore, make sure that the connection string of the selected profile includes an OLE DB provider that is compatible with the intended remote database. Ex: If you intend to use an Oracle database, select a remote database profile with the corresponding Oracle OleDB driver.

When you add a process, you are required to define its settings. This occurs in the process's properties window which is displayed automatically after having added the "Delete Record(s)" process. This properties window is divided into three tabs - "General", "Query" and "Advanced".

If any subsequent edition is required, double-click the process to open its properties window and enter the necessary modifications.

"General" tab

Fill in the following options

Host Name & Data Source
Host Name	Select a host profile from the drop-down OR click to create a new host profile or edit an existing one. See To Create a Host Profile OR To Edit a Host Profile OR or The <Default> Host Profile. As an alternative, you can use a variable to define the Host Name (use the "Variable Select" option that is accessed if you right-click this box). See The Use of a Variable to Define a Host Name.
Data Source	Select the database that includes the records to delete from the drop-down OR click to add one. See To Add a Data Source to MCL-Designer V4. As an alternative, you can use a variable to define the Data Source (use the "Variable Select" option that is accessed if you right-click this box). See The Use of a Variable to Define a Data Source. Before using the “Variable Select” alternative, consider your choices in the “Remote Database” tab (see Remote Database tab in "Project Properties"): •If the “SQL Commands option” is set to “2. Server (Save SQL statement into MQD file for server)", the “Variable Select” option is NOT applicable/supported.
Data Table
Table Name	Select the table with the records to delete from the drop-down. As an alternative, you can use a variable to define the Table Name (use the "Variable Select" option that is accessed if you right-click this box). See The Use of a Variable to Define a Data Source.

Proceed to the "Query" tab.

"Query" tab

Proceed as follows:

Where
Where Clause	Click to create the appropriate query. See To Use the Query Assistant. You can create up to 80 Where Conditions.

Use the editing icons to the right of the table to move the rows up and down and to delete or add more rows.

Go to the "Advanced" tab.

"Advanced" tab

Proceed as follows:

SQL request name (Must be unique)
Name	Define a unique name for the SQL request. One is always suggested.
If … Go to
DB Error	Select a target location from the drop-down or the list, if an "ODBC Error" occurs. See Detail of a window below. When defining a screen as a target destination (ex: via a “Go to” process), you CANNOT use variables to specify the name of that target screen. You must select the intended screen from the available drop-down/list.
Comm Error	Select a target location from the drop-down list or the list, in case there is a communications error. See Detail of a window below. When defining a screen as a target destination (ex: via a “Go to” process), you CANNOT use variables to specify the name of that target screen. You must select the intended screen from the available drop-down/list.

Detail of a window:

"S:Menu" is a screen included in the same program as the process.

"R:Routine_1" is a routine included in the same program as the process.

If required, use the icons on the upper right corner of the properties window:

Click it to set up a time out. See Time Out.

Click it to edit a data file. See Editing a Data File.

Use it to test SQL scripts. See To Test SQL Scripts.

Use the icon to attach any relevant notes to this process. Click it and enter your notes in the resulting text box. These notes will be displayed in the corresponding "Actions" tab or "Process" window (in the "Notes" field) and in the "Developer Report".

After filling in the required options, click to conclude or to abort the operation.

The added process is displayed in the corresponding "Actions" tab or "Process" window.

If you want to use a label as a target destination, you can use the "Auto-Label" mechanism. This alternative to the "Set Label" process allows you to create a label in the properties window of a process - specifically, in the fields used to define target destinations (ex: the "If Error..." type fields). See To Automatically Create a Label.

Use the right-click in MCL-Designer's input boxes to access some related options as well as the general "Cut", "Copy"; "Paste"; "Search" actions (active/inactive according to the current context).

Ex: If you right-click the "Variable" input box (included in a "Conversion's" properties window), you are provided with general editing/search actions and other more specific options such as "Variable Select" (see "Variable Select"); "Variable Insert" (see "Variable Insert"); "Insert Special Character" (see To Insert Special Characters into a Control's Text Input Field) and "Localization Select" (see Localization List).

If you right-click another input box, it may provide other possibilities.