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Ordering and NULLS
Applies to ✅ Open Source Edition ✅ Express Edition ✅ Professional Edition ✅ Enterprise Edition
A few databases support the SQL standard "null ordering" clause in sort specification lists, to define whether NULL values should come first or last in an ordered result.
SELECT
AUTHOR.FIRST_NAME,
AUTHOR.LAST_NAME
FROM AUTHOR
ORDER BY LAST_NAME ASC,
FIRST_NAME ASC NULLS LAST
create.select(
AUTHOR.FIRST_NAME,
AUTHOR.LAST_NAME)
.from(AUTHOR)
.orderBy(AUTHOR.LAST_NAME.asc(),
AUTHOR.FIRST_NAME.asc().nullsLast())
.fetch();
If your database doesn't support this syntax, jOOQ emulates it using a CASE expression
Dialect support
This example using jOOQ:
select(AUTHOR.FIRST_NAME).from(AUTHOR).orderBy(AUTHOR.FIRST_NAME.asc().nullsLast())
Translates to the following dialect specific expressions:
Access, SQLServer
SELECT AUTHOR.FIRST_NAME FROM AUTHOR ORDER BY iif(AUTHOR.FIRST_NAME IS NOT NULL, 0, 1), AUTHOR.FIRST_NAME ASC
ASE, Aurora MySQL, MemSQL, MySQL, SQLDataWarehouse, Sybase
SELECT AUTHOR.FIRST_NAME FROM AUTHOR ORDER BY CASE WHEN AUTHOR.FIRST_NAME IS NOT NULL THEN 0 ELSE 1 END, AUTHOR.FIRST_NAME ASC
Aurora Postgres, BigQuery, ClickHouse, CockroachDB, Derby, DuckDB, Exasol, Firebird, H2, HSQLDB, Hana, Informix, Oracle, Postgres, SQLite, Snowflake, Teradata, Trino, YugabyteDB
SELECT AUTHOR.FIRST_NAME FROM AUTHOR ORDER BY AUTHOR.FIRST_NAME ASC NULLS LAST
DB2, MariaDB, Redshift, Vertica
SELECT AUTHOR.FIRST_NAME FROM AUTHOR ORDER BY nvl2(AUTHOR.FIRST_NAME, 0, 1), AUTHOR.FIRST_NAME ASC
Generated with jOOQ 3.20. Translate your own SQL on our website
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