mirror of
https://github.com/elastic/elasticsearch.git
synced 2025-06-29 18:03:32 -04:00
94cad286bc
In a few previous PR's we restructured the ES|QL docs to make it possible to generate them dynamically. This PR just moves a few files around to make the query languages docs easier to work with, and a little more organized like the ES|QL docs. A bit part of this was setting up redirects to the new locations, so other repo's could correctly link to the elasticsearch docs.
1.3 KiB
1.3 KiB
Comparison Operators [sql-operators]
Boolean operator for comparing against one or multiple expressions.
Equality (=) [sql-operators-equality]
SELECT last_name l FROM "test_emp" WHERE emp_no = 10000 LIMIT 5;
Null safe Equality (<=>) [sql-operators-null-safe-equality]
SELECT 'elastic' <=> null AS "equals";
equals
---------------
false
SELECT null <=> null AS "equals";
equals
---------------
true
Inequality (<> or !=) [sql-operators-inequality]
SELECT last_name l FROM "test_emp" WHERE emp_no <> 10000 ORDER BY emp_no LIMIT 5;
Comparison (<, <=, >, >=) [sql-operators-comparison]
SELECT last_name l FROM "test_emp" WHERE emp_no < 10003 ORDER BY emp_no LIMIT 5;
BETWEEN [sql-operators-between]
SELECT last_name l FROM "test_emp" WHERE emp_no BETWEEN 9990 AND 10003 ORDER BY emp_no;
IS NULL/IS NOT NULL [sql-operators-is-null]
SELECT last_name l FROM "test_emp" WHERE emp_no IS NOT NULL AND gender IS NULL;
IN (<value1>, <value2>, ...) [sql-operators-in]
SELECT last_name l FROM "test_emp" WHERE emp_no IN (10000, 10001, 10002, 999) ORDER BY emp_no LIMIT 5;