mirror of
https://github.com/elastic/elasticsearch.git
synced 2025-06-30 10:23:41 -04:00
b98606e712
* [docs] Migrate docs from AsciiDoc to Markdown (#123507) * delete asciidoc files * add migrated files * fix errors * Disable docs tests * Clarify release notes page titles * Revert "Clarify release notes page titles" This reverts commit8be688648d. * Comment out edternal URI images * Clean up query languages landing pages, link to conceptual docs * Add .md to url * Fixes inference processor nesting. --------- Co-authored-by: Liam Thompson <32779855+leemthompo@users.noreply.github.com> Co-authored-by: Liam Thompson <leemthompo@gmail.com> Co-authored-by: Martijn Laarman <Mpdreamz@gmail.com> Co-authored-by: István Zoltán Szabó <szabosteve@gmail.com> (cherry picked from commitb7e3a1e14b) # Conflicts: # docs/build.gradle # docs/reference/migration/index.asciidoc # docs/reference/migration/migrate_9_0.asciidoc # docs/reference/release-notes.asciidoc # docs/reference/release-notes/9.0.0.asciidoc # docs/reference/release-notes/highlights.asciidoc * Fix build file * Really fix build file --------- Co-authored-by: Colleen McGinnis <colleen.j.mcginnis@gmail.com>
70 lines
1.3 KiB
Markdown
70 lines
1.3 KiB
Markdown
---
|
|
mapped_pages:
|
|
- https://www.elastic.co/guide/en/elasticsearch/reference/current/sql-operators.html
|
|
---
|
|
|
|
# Comparison Operators [sql-operators]
|
|
|
|
Boolean operator for comparing against one or multiple expressions.
|
|
|
|
## `Equality (=)` [sql-operators-equality]
|
|
|
|
```sql
|
|
SELECT last_name l FROM "test_emp" WHERE emp_no = 10000 LIMIT 5;
|
|
```
|
|
|
|
|
|
## `Null safe Equality (<=>)` [sql-operators-null-safe-equality]
|
|
|
|
```sql
|
|
SELECT 'elastic' <=> null AS "equals";
|
|
|
|
equals
|
|
---------------
|
|
false
|
|
```
|
|
|
|
```sql
|
|
SELECT null <=> null AS "equals";
|
|
|
|
equals
|
|
---------------
|
|
true
|
|
```
|
|
|
|
|
|
## `Inequality (<> or !=)` [sql-operators-inequality]
|
|
|
|
```sql
|
|
SELECT last_name l FROM "test_emp" WHERE emp_no <> 10000 ORDER BY emp_no LIMIT 5;
|
|
```
|
|
|
|
|
|
## `Comparison (<, <=, >, >=)` [sql-operators-comparison]
|
|
|
|
```sql
|
|
SELECT last_name l FROM "test_emp" WHERE emp_no < 10003 ORDER BY emp_no LIMIT 5;
|
|
```
|
|
|
|
|
|
## `BETWEEN` [sql-operators-between]
|
|
|
|
```sql
|
|
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]
|
|
|
|
```sql
|
|
SELECT last_name l FROM "test_emp" WHERE emp_no IS NOT NULL AND gender IS NULL;
|
|
```
|
|
|
|
|
|
## `IN (<value1>, <value2>, ...)` [sql-operators-in]
|
|
|
|
```sql
|
|
SELECT last_name l FROM "test_emp" WHERE emp_no IN (10000, 10001, 10002, 999) ORDER BY emp_no LIMIT 5;
|
|
```
|
|
|
|
|