The elements of logic include conditional and comparison blocks used to modify trigger behavior. The following blocks are available: IF...THEN... , CASE, true/false, AND/OR, NOT, not true/false, and comparison blocks. 

IF... THEN... 

IF... THEN... statement can be used to conditionally execute the logic based on the status of a condition. If the condition is true, the statement is executed, and if the condition is false, then the IF statement does nothing. 

It can be used to conditionally send email reminders to sales representatives based on the status of their open leads. 

Options

You can combine IF... THEN... with ELSE. To do so, click the gear icon in the block. 

IF... THEN... executes actions defined in ELSE when the IF condition is not satisfied.  

In the above example, whenever the condition is true, the record with the matching ID is removed from the table. Otherwise, an email with a notification is sent. 

Note: The IF... THEN... block is resource-hungry, which means it may slow down your application. Therefore, it is preferable to move the condition from the IF... THEN... to the WHERE block whenever possible.

CASE

CASE reads all the conditions and returns a value when the first condition is met. When the first condition set to true is encountered, it stops reading and returns the result. 

For example, it can be used to define conditions upon which field categories are assigned to a given table. The CASE function reads the conditions and, when the first true condition is encountered, assigns the corresponding category to the field. 

Options 

You can combine CASE with ELSE. To do so, click the gear icon in the block. 

CASE returns the value in the ELSE clause when no conditions in the logic are true. If there is no ELSE option and no true conditions, it doesn’t return any value. 

Note: A CASE block should always return one and the same data type. Returning different data types, for instance, number in WHEN but text in ELSE can lead to undefined behavior and incorrect trigger operation.

True/False  

True/False provides true or false value for a statement. It can be used in the logic statements.

AND/OR 

And/ Or elements can be combined with WHERE or when joining tables. 

For And, the condition is true if all the conditions separated by And are true. 

For Or, the condition is true if any of the conditions separated by Or is true.

NOT 

Displays a record if the condition is not true. It is used to negate a condition in the WHERE block. 

Not True/False 

Not True/False returns inverted true/false value.