Logical Operations Best Practices and Quick Reference
You can include logical operations when you build expressions. Here are best practices and a quick reference table of available logical operations.
Best Practices
Follow these best practices when you use logical operations in expressions.
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Calculated dates may include the entire time stamp and calculated numbers may return a number with decimals. For a calculated number, use the ROUND function, and for calculated dates use TRUNC when appropriate.
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While comparing strings, ensure their case matches to prevent incorrect responses. Use the UPPER or LOWER function as needed.
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To avoid possible null values use the NVL function.
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Usage of all Logical operations (which only have a Boolean output) is restricted to within the input condition of the CHOICE statement. This includes IS_GREATER, IS_LESS, IS_EQUAL, IS_NULL, NOT, IS_IN, IS_BETWEEN, AND, OR, and IS_LIKE.
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Strings are compared in lexical orders when used in comparison functions. Use them appropriately.
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While comparing multiple inputs, match the types. Use TO_NUMBER or TO_CHAR or TO_DATE functions as needed.
Quick Reference
This table lists the syntax, inputs, return data type, and examples for logical operations.
Syntax |
Inputs |
Return Data Type |
Example |
---|---|---|---|
CHOICE (Condition 1*, Value 1*, Condition 2, Value 2, ...Condition n, Value n, Value Z*) |
|
String, Number or Date (Same as Value) |
|
IS_EQUAL (Value 1*, Value 2*) |
|
Boolean |
|
IS_NULL (Value*) |
Value*: String or date or number or Boolean |
Boolean |
|
IS_GREATER (Value 1*, Value 2*) |
|
Boolean |
|
IS_LESS (Value 1*, Value 2*) |
|
Boolean |
|
IS_BETWEEN (Value to evaluate*, Minimum Value*, Maximum Value*) |
|
Boolean |
|
AND (Condition 1*, Condition 2, ...Condition n) |
|
Boolean |
|
OR (Condition 1*, Condition 2, ...Condition n) |
|
Boolean |
|
NOT (Condition*) |
Condition*: Boolean |
Boolean |
|
IS_LIKE (Value 1*, Value 2*) |
|
Boolean |
|
IS_IN (Value*, In Value 1*, ...In Value n) |
|
Boolean |
|