strongduanmu commented on issue #22170: URL: https://github.com/apache/shardingsphere/issues/22170#issuecomment-1319493004
According to PostgreSQL document——https://www.postgresql.org/docs/current/queries-order.html, The NULLS FIRST and NULLS LAST options can be used to determine whether nulls appear before or after non-null values in the sort ordering. By default, null values sort as if larger than any non-null value; that is, NULLS FIRST is the default for DESC order, and NULLS LAST otherwise. ```sql demo_ds_0=# SELECT * FROM t_ssdb_tb_1 order by a asc; id | c_id | a | b ----+------+----+------------ 2 | 1 | 20 | test21 2 | 3 | | Test22 (2 rows) demo_ds_0=# SELECT * FROM t_ssdb_tb_1 order by a desc; id | c_id | a | b ----+------+----+------------ 2 | 3 | | Test22 2 | 1 | 20 | test21 (2 rows) ``` -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
