Available in versions: Dev (3.21) | Latest (3.20) | 3.19 | 3.18 | 3.17 | 3.16 | 3.15 | 3.14 | 3.13 | 3.12 | 3.11
Derived tables
Applies to ✅ Open Source Edition ✅ Express Edition ✅ Professional Edition ✅ Enterprise Edition
A derived table is a nested SELECT in the FROM clause, i.e. it can be used as a table expression. As such, it works differently from a scalar subquery, which is a column expression.
SELECT nested.* FROM (
SELECT AUTHOR_ID, count(*) books
FROM BOOK
GROUP BY AUTHOR_ID
) nested
ORDER BY nested.books DESC
Table<?> nested =
create.select(BOOK.AUTHOR_ID, count().as("books"))
.from(BOOK)
.groupBy(BOOK.AUTHOR_ID).asTable("nested");
create.select(nested.fields())
.from(nested)
.orderBy(nested.field("books"))
.fetch();
Dialect support
This example using jOOQ:
selectFrom(select(BOOK.ID).from(BOOK).asTable("t"))
Translates to the following dialect specific expressions:
All dialects
SELECT t.ID FROM ( SELECT BOOK.ID FROM BOOK ) t
Generated with jOOQ 3.21. Support in older jOOQ versions may differ. Translate your own SQL on our website
Feedback
Do you have any feedback about this page? We'd love to hear it!