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69 lines
1.4 KiB
ReStructuredText
69 lines
1.4 KiB
ReStructuredText
Distinct queries
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================
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.. contents:: Table of contents
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:backlinks: none
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:depth: 1
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:local:
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You can fetch distinct columns using ``distinct_on`` argument. Initial ``order_by`` columns must
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match ``distinct_on`` columns. Learn more about ``order_by`` :doc:`here <sorting>`.
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.. code-block:: graphql
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employee (
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distinct_on: [employee_select_column]
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order_by: [employee_order_by]
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): [employee]!
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#select column enum type for "employee" table
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enum employee_select_column {
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id
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name
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department
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salary
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}
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For example, fetch highest salaried employee from each department:
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.. graphiql::
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:view_only:
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:query:
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query {
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employee(
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distinct_on: [department]
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order_by: [{department: asc}, {salary: desc}]
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){
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id
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name
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department
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salary
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}
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}
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:response:
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{
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"data": {
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"employee": [
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{
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"id": 5,
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"name": "Kamila",
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"department": "Engineering",
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"salary": 4325
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},
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{
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"id": 4,
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"name": "Damien",
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"department": "Product",
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"salary": 3124
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},
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{
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"id": 7,
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"name": "Rickard",
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"department": "Services",
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"salary": 2223
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}
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]
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}
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}
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