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Predicates in SQL
Predicates are operations that test whether something is true or not. They can test the relationship between expressions or test for a characteristic of an expression. Row value expressions can also be used as operands to predicates where this makes sense.
SQL supports the following types of predicates:
Comparison
=, <>, <, >=, >, <=
IS DISTINCT FROM
BETWEEN
Quantified comparison
=ALL, <>ALL, <ALL, >=ALL, >ALL, <=ALL
=ANY, <>ANY, <ANY, >=ANY, >ANY, <=ANY
Pattern matching:
LIKE
BEGINNING, ENDING, CONTAINING
SIMILAR TO
Containment
IN
Existence
EXISTS
IS NULL
IS INTEGER
IS DECIMAL
IS FLOAT
IS TRUE, IS FALSE, IS UNKNOWN
IS INGRESDATE
IS ANSIDATE
IS TIME
IS TIMESTAMP
IS INTERVAL YEAR TO MONTH
IS INTERVAL DAY TO SECOND
IS II_DATE_FORMAT
Note:  The long data types (long varchar, long byte, and long nvarchar) cannot be used with predicates that need to inspect the content of data, such as to determine equality. The pattern-matching predicates can be used with long varchar and long nvarchar.
Last modified date: 08/29/2024