语法和PostreSQL一致,和Oracle的区别有点大。Oracle如果Update有Select的话是直接在Update后面的子查询里面的

语法

UPDATE [ONLY] table [[AS] alias]
   SET {column = {expression | DEFAULT} |
   (column [, ...]) = ({expression | DEFAULT} [, ...])} [, ...]
   [FROM fromlist]
   [WHERE condition | WHERE CURRENT OF cursor_name ]

实例

update fs.test t
  set channelprice = t1.channelprice,
      channelname  = t1.channelname,
      provider     = t1.provider,
      provinceid   = t1.provinceid,
      spcode       = t1.spcode,
  from (select * from def.test2 ) t1
 where t.sp_pay_id = t1.utmid
   and t.create_time >= '2016-05-01'::date
   and t.create_time <  '2016-06-08'::date
   and t.real_type = '961'

注意事项

对于set列中左边的列不能使用t.这种别名方式，只能使用columen名称

本文来源：https://blog.csdn.net/Team77/article/details/51611937