Count - Paradedb — ContextQMD

The following query counts the number of values in a field:

<CodeGroup> ```sql SQL SELECT pdb.agg('{"value_count": {"field": "rating"}}') FROM mock_items WHERE id @@@ pdb.all(); ```

import { search } from "@paradedb/drizzle-paradedb";

await db
  .select({
    agg: search.agg({ value_count: { field: "rating" } }),
  })
  .from(mockItems)
  .where(search.all(mockItems.id));

python

from paradedb import Agg, All, ParadeDB

MockItem.objects.filter(
    id=ParadeDB(All())
).aggregate(agg=Agg('{"value_count": {"field": "rating"}}'))

python

from sqlalchemy import select
from sqlalchemy.orm import Session
from paradedb.sqlalchemy import facets, pdb, search

stmt = (
    select(pdb.agg(facets.value_count(field="rating")))
    .select_from(MockItem)
    .where(search.all(MockItem.id))
)

with Session(engine) as session:
    session.execute(stmt).all()

ruby

MockItem.search(:id)
        .match_all
        .facets_agg(agg: ParadeDB::Aggregations.value_count(:rating))

await dbContext
    .MockItems.Where(item => EF.Functions.All(item.Id))
    .Select(item => EF.Functions.Agg(new { value_count = new { field = "rating" } }))
    .ToListAsync();

</CodeGroup>

ini

       agg
-----------------
 {"value": 41.0}
(1 row)

See the Tantivy documentation for all available options.

SQL Count Syntax

SQL's COUNT syntax is supported in beta. To enable it, first run

sql

SET paradedb.enable_aggregate_custom_scan TO on;

With this feature enabled, the following query is equivalent to the above and is executed in the same way.

sql

SELECT COUNT(rating) FROM mock_items
WHERE id @@@ pdb.all();

To count all rows, including rows with null values, use COUNT(*):

sql

SELECT COUNT(*) FROM mock_items
WHERE id @@@ pdb.all();