原文地址: https://www.elastic.co/guide/en/elasticsearch/reference/7.7/sql-operators.html, 原文档版权归 www.elastic.co 所有
IMPORTANT: No additional bug fixes or documentation updates will be released for this version. For the latest information, see the current release documentation.
Elasticsearch Guide [7.7] » SQL access » Functions and Operators » Comparison Operators
« Functions and Operators Logical Operators »

Comparison Operatorsedit

Boolean operator for comparing against one or multiple expressions.

Equality (=)edit 

SELECT last_name l FROM "test_emp" WHERE emp_no = 10000 LIMIT 5;

Null safe Equality (<=>)edit 

SELECT 'elastic' <=> null AS "equals";

    equals
---------------
false
SELECT null <=> null AS "equals";

    equals
---------------
true

Inequality (<> or !=)edit 

SELECT last_name l FROM "test_emp" WHERE emp_no <> 10000 ORDER BY emp_no LIMIT 5;

Comparison (<, <=, >, >=)edit 

SELECT last_name l FROM "test_emp" WHERE emp_no < 10003 ORDER BY emp_no LIMIT 5;

BETWEENedit 

SELECT last_name l FROM "test_emp" WHERE emp_no BETWEEN 9990 AND 10003 ORDER BY emp_no;

IS NULL/IS NOT NULLedit 

SELECT last_name l FROM "test_emp" WHERE emp_no IS NOT NULL AND gender IS NULL;

IN (<value1>, <value2>, ...)edit 

SELECT last_name l FROM "test_emp" WHERE emp_no IN (10000, 10001, 10002, 999) ORDER BY emp_no LIMIT 5;
« Functions and Operators Logical Operators »