Available in versions: Dev (3.19) | Latest (3.18) | 3.17 | 3.16 | 3.15 | 3.14 | 3.13 | 3.12

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)

-- ACCESS, ASE, AURORA_MYSQL, BIGQUERY, DERBY, DUCKDB, EXASOL, FIREBIRD, HANA, HSQLDB, INFORMIX, MEMSQL, REDSHIFT, 
-- SQLDATAWAREHOUSE, SYBASE, TERADATA, VERTICA
/* UNSUPPORTED */

(These are currently generated with jOOQ 3.19, see #10141), or translate your own on our website

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