79 lines
1.1 KiB
Markdown
79 lines
1.1 KiB
Markdown
|
---
|
||
|
|
layout: default
|
||
|
|
title: Delete
|
||
|
|
parent: SQL
|
||
|
|
nav_order: 12
|
||
|
|
---
|
||
|
|
|
||
|
|
|
||
|
|
# Delete
|
||
|
|
|
||
|
|
The `DELETE` statement deletes documents that satisfy the predicates in the `WHERE` clause.
|
||
|
|
If you don't specify the `WHERE` clause, all documents are deleted.
|
||
|
|
|
||
|
|
### Syntax
|
||
|
|
|
||
|
|
Rule `singleDeleteStatement`:
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
### Example
|
||
|
|
|
||
|
|
SQL query:
|
||
|
|
|
||
|
|
```sql
|
||
|
|
DELETE FROM accounts
|
||
|
|
WHERE age > 30
|
||
|
|
```
|
||
|
|
|
||
|
|
Explain:
|
||
|
|
|
||
|
|
```json
|
||
|
|
{
|
||
|
|
"size" : 1000,
|
||
|
|
"query" : {
|
||
|
|
"bool" : {
|
||
|
|
"must" : [
|
||
|
|
{
|
||
|
|
"range" : {
|
||
|
|
"age" : {
|
||
|
|
"from" : 30,
|
||
|
|
"to" : null,
|
||
|
|
"include_lower" : false,
|
||
|
|
"include_upper" : true,
|
||
|
|
"boost" : 1.0
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
],
|
||
|
|
"adjust_pure_negative" : true,
|
||
|
|
"boost" : 1.0
|
||
|
|
}
|
||
|
|
},
|
||
|
|
"_source" : false
|
||
|
|
}
|
||
|
|
```
|
||
|
|
|
||
|
|
Result set:
|
||
|
|
|
||
|
|
```json
|
||
|
|
{
|
||
|
|
"schema" : [
|
||
|
|
{
|
||
|
|
"name" : "deleted_rows",
|
||
|
|
"type" : "long"
|
||
|
|
}
|
||
|
|
],
|
||
|
|
"total" : 1,
|
||
|
|
"datarows" : [
|
||
|
|
[
|
||
|
|
3
|
||
|
|
]
|
||
|
|
],
|
||
|
|
"size" : 1,
|
||
|
|
"status" : 200
|
||
|
|
}
|
||
|
|
```
|
||
|
|
|
||
|
|
The `datarows` field shows the number of documents deleted.
|