Use the following guidelines when you configure a Lookup transformation that has a static lookup cache or an uncached lookup source:
Use the following operators when you create the lookup condition:
=, >, <, >=, <=, !=
If you include more than one lookup condition, place the conditions in the following order to optimize lookup performance:
Equal to (=)
Less than (<), greater than (>), less than or equal to (<=), greater than or equal to (>=)
Not equal to (!=)
For example, create the following lookup condition:
ITEM_ID = IN_ITEM_ID
PRICE <= IN_PRICE
The input value must meet all conditions for the lookup to return a value.
The condition can match equivalent values or supply a threshold condition. For example, you might look for customers who do not live in California, or employees whose salary is greater than $30,000. Depending on the nature of the source and condition, the lookup might return multiple values.