创建一个多重查询

Question

我想在同一代码中运行2个查询，但是我不知道该怎么做。这两个查询如下：

UPDATE usercomp
         SET shiftstart = shifts.shiftstarttime,
             shiftfinish = shifts.shiftfinishtime
FROM shifts
     WHERE usercomp.shiftid = shifts.id
         SET break1start = breaks.timestarted,
             break1finish = breaks.timefinished,
             break1duration = breaks.duration
FROM breaks
     WHERE usercomp.break1id = breaks.id;

我遇到以下错误：

ERROR:  syntax error at or near "SET"
LINE 6: SET break1start = breaks.timestarted,

任何人都可以帮忙吗？

Answer 1

您需要编写两个UPDATE语句

UPDATE usercomp 
    SET shiftstart = shifts.shiftstarttime,
        shiftfinish = shifts.shiftfinishtime
FROM shifts
WHERE usercomp.shiftid = shifts.id;

UPDATE usercomp
    SET break1start = breaks.timestarted,
        break1finish = breaks.timefinished,
        break1duration = breaks.duration
FROM breaks
WHERE usercomp.break1id = breaks.id;