单表更新

最近更新时间: 2025-02-18 16:02:00

  • 复制
    复制成功
postgres=# update tbase set nickname ='Hello TDSQL PG' where id=1;
UPDATE 1
  • null条件的表达方法。
  • 复制
    复制成功
postgres=# update tbase set nickname = 'Good TDSQL PG' where nickname is null;
UPDATE 1
postgres=# select * from tbase;
 id |  nickname   
----+-------------
  2 | TDSQL PG好
  1 | Hello TDSQL PG
  3 | Good TDSQL PG
(3 rows)