我想在Oracle做一个问询或某种功能,可以更新24 000个牢房。 例如,1个更新的问询就是这样:
update numbers
set status = 1 and some_id = 123123
where number_id = 1231;
在每一次询问中,“某些”和“数字”不同。
Problem is doing this one by one is taking too much time, I need quicker solution.
我想在Oracle做一个问询或某种功能,可以更新24 000个牢房。 例如,1个更新的问询就是这样:
update numbers
set status = 1 and some_id = 123123
where number_id = 1231;
在每一次询问中,“某些”和“数字”不同。
Problem is doing this one by one is taking too much time, I need quicker solution.
将不同价值观纳入一个表格,然后在您的问询中使用:
update numbers n
set status=1,
some_id = (select some_id from newtable t where t.number_id = n.number_id)
where number_id in (select number_id from newtable);
它看一看你是否在问询中难以调取定点和更新价值。 通过使用约束性变量,你可以大大改善业绩。 有了约束性变量,Oracle只需要一个硬拷贝,用于所有24k完全相同的UNPDATE,而不是24k硬拷贝(和最新的执行计划)用于24k独特的UNPDATE报表。
With Java:
update numbers
set status = ?, some_id = ?
where number_id = ?;
利用其他工具:
update numbers
set status = :1, some_id = :2
where number_id = :3;
笔录 它一劳永逸。
或使用<条码> 预先声明条码>,并批量您的请求。
他们可能要花太长的时间,因为你们每次都进行往返。 巴奇将帮助大事,因为你只进行一次往返。
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