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RANK

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

The RANK() hypothetical set function calculates the rank with gaps of the hypothetical value, i.e. ranks will be 1, 1, 1, 4, 5, 5, 7 (DENSE_RANK produces values without gaps, e.g. 1, 1, 1, 2, 3, 3, 4)

SELECT 
  rank(0) WITHIN GROUP (ORDER BY AUTHOR_ID),
  rank(1) WITHIN GROUP (ORDER BY AUTHOR_ID),
  rank(2) WITHIN GROUP (ORDER BY AUTHOR_ID)
FROM BOOK
create.select(
         rank(val(0)).withinGroupOrderBy(BOOK.AUTHOR_ID),
         rank(val(2)).withinGroupOrderBy(BOOK.AUTHOR_ID),
         rank(val(4)).withinGroupOrderBy(BOOK.AUTHOR_ID))
      .from(BOOK)

Producing:

+---------+---------+---------+
| rank(0) | rank(1) | rank(2) |
+---------+---------+---------+
|       1 |       1 |       3 |
+---------+---------+---------+

Dialect support

This example using jOOQ:

rank(val(0)).withinGroupOrderBy(BOOK.ID)

Translates to the following dialect specific expressions:

-- AURORA_POSTGRES, H2, ORACLE, POSTGRES
rank(0) WITHIN GROUP (ORDER BY BOOK.ID)

-- ACCESS, ASE, AURORA_MYSQL, COCKROACHDB, DB2, DERBY, FIREBIRD, HANA, HSQLDB, INFORMIX, INGRES, MARIADB, MEMSQL, MYSQL, 
-- REDSHIFT, SQLDATAWAREHOUSE, SQLITE, SQLSERVER, SYBASE, TERADATA, VERTICA
/* UNSUPPORTED */

(These are currently generated with jOOQ 3.15, see #10141)

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