Open the Relation Design window again, this time change both Update options to ‘Update cascade’ for both lines. Update cascade – automatically updates any related foreign keys to match the primary key. Also set the Delete options to ‘Delete cascade’. … Take lesson
Referential integrity means controlling how records are altered or deleted in a relational database (i.e. one with links/relationships between fields in different tables). To define the rules of how records are altered across relationships, you must right click on the … Take lesson
For this example, create 3 new tables with the designs shown. Note the Order Details table has 2 fields combined to create the primary key. To do this, hold down Ctrl key, click in the grey area to the left … Take lesson
A one-to-many relationship links the primary key to a field in a second table that may have more than one records (row). Click Tools – Relationships from the main window ribbon. The Relation Design window opens. Click ‘Insert’ – Add … Take lesson
For this section we need to create a new table. Create a new table in design mode, with the two fields shown for the cost of repair jobs. For the Cost field, select Decimal data type, set decimal places to … Take lesson
Open the ‘Jobs’ table in design mode. If we want to ensure that data is always entered for a certain field, click on the relevant field. In the Field Properties box at the bottom of the screen, select ‘Yes’ from … Take lesson
In Base you can only create input masks in a form (not a table as in MS Access). We are going to edit the date field to only allow dates to be inputted in the format DD** MMM YY (e.g. … Take lesson
Libreoffice Base doesn’t allow you to create a ‘lookup’ list in a table in the way it does in MS Access. We will have to use a form to do the same thing. Right click on the Jobs Entry form … Take lesson
Create a form for inputting jobs. Go to forms in the main window, then click on ‘Use wizard to create form’. Select all of the fields from the ‘Jobs’ table, select the arrangement you prefer. Name the form ‘Jobs Entry’ … Take lesson
For this module we are going to create a database for a car repairs garage. We are going to set up some tables and a form in this section to demonstrate the principles. First, create a new database in LibreOffice … Take lesson