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JSON_OBJECT

Applies to ✅ Open Source Edition   ✅ Express Edition   ✅ Professional Edition   ✅ Enterprise Edition

The JSON_OBJECT function is used to produce simple JSON objects from scalar values, without aggregation (see also JSON_OBJECTAGG)

SELECT json_object(
  KEY 'firstName' VALUE author.first_name,
  KEY 'lastName'  VALUE author.last_name
)
FROM author
create.select(jsonObject(
          key("firstName").value(AUTHOR.FIRST_NAME),
          key("lastName").value(AUTHOR.LAST_NAME)))
      .from(AUTHOR)
      .fetch();

The result would look like this:

+--------------------------------------------+
| json_array                                 |
+--------------------------------------------+
| {"firstName":"Paulo","lastName":"Coelho"}  |
| {"firstName":"George","lastName":"Orwell"} |
+--------------------------------------------+

Dialect support

This example using jOOQ:

jsonObject("firstName", AUTHOR.FIRST_NAME)

Translates to the following dialect specific expressions:

Aurora Postgres, CockroachDB, Postgres, YugabyteDB

json_build_object('firstName', AUTHOR.FIRST_NAME)

DB2, H2, Oracle

json_object(KEY 'firstName' VALUE AUTHOR.FIRST_NAME)

MariaDB, MySQL, SQLite

json_object('firstName', AUTHOR.FIRST_NAME)

Snowflake

object_construct_keep_null('firstName', AUTHOR.FIRST_NAME)

SQLServer

(
  SELECT (
    SELECT *
    FROM (
      VALUES (AUTHOR.FIRST_NAME)
    ) t (firstName)
    FOR JSON PATH, INCLUDE_NULL_VALUES, WITHOUT_ARRAY_WRAPPER
  )
)

Trino

CAST(map_from_entries(ARRAY[row(
  'firstName',
  CAST(AUTHOR.FIRST_NAME AS json)
)]) AS json)

ASE, Access, Aurora MySQL, BigQuery, Derby, DuckDB, Exasol, Firebird, HSQLDB, Hana, Informix, MemSQL, Redshift, SQLDataWarehouse, Sybase, Teradata, Vertica

/* UNSUPPORTED */

(These are currently generated with jOOQ 3.20, see #10141), or translate your own on our website

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