Software Platform User guide

Table Of Contents
Note:
When you link fields using joins, no indexed fields are required.
The join types are:
Inner join
Left Outer join
Right Outer join
Full Outer join
The enforce join options are:
Not Enforced
Enforced From
Enforced To
Enforced Both
The link types are:
Equal [=] link
Greater Than [>] link
Greater Than Or Equal [>=] link
Less Than [<] link
Less Than Or Equal [<=] link
Not Equal [!=] link
Inner join
An Inner join is the standard type of join. The result set from an Inner join
includes all the records in which the linked field value in both tables is an
exact match. For instance, you can use an Inner join to view all customers
and the orders they have placed. You will not get a match for any customer
who has not placed orders.
Orders TableCustomer TableCustomer Table
Order AmountCustomer NameCustomer ID
25141.50Allez Distribution52
Crystal Reports 2008 SP3 User's Guide 679
25
Understanding Databases
Linking tables