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Step 7: Repeat Step 5 to 7 to add more fields in the table.
The green arrow key before the cell shows the currently active field. Move this arrow key to the first column
created - Adm No. field.
Step 8: Right-click on the arrow to display the context menu.
Step 9: Select Primary Key from the context menu as shown below:
A key-like symbol appears in front of Adm No. indicating that the column will now act like a primary key where only
unique values are allowed, and no value can be left blank.
Note that to set a composite key, i.e. a primary key consisting of two fields, keep the Ctrl key pressed and then click on
multiple fields to select them. Thereafter right click on selected fields and choose Primary Key option from the pop-up
menu.
308 Trackpad Information Technology (Ver. 1.0)-X

