我有这张表,其中包含以下数据
Job Quantity Status Repeat 1 100 OK 2 2 400 HOLD 0 3 200 HOLD 1 4 450 OK 3
根据每行“重复”列中的值,应再次重复该行。例如,对于“作业1”,“重复”值为2,因此“作业1”应重复两次以上。
结果表应如下
Job Quantity Status Repeat 1 100 OK 2 1 100 OK 2 1 100 OK 2 2 400 HOLD 0 3 200 HOLD 1 3 200 HOLD 1 4 450 OK 3 4 450 OK 3 4 450 OK 3 4 450 OK 3
有人可以帮我解决这个问题吗?我正在使用oracle 10g
假设您每行不会产生超过1000行:
with num as (select level as rnk from dual connect by level<=1000) select Job, Quantity, Status, Repeat, rnk from t join num on ( num.rnk <= repeat ) order by job, rnk;
这是一个测试:http : //sqlfiddle.com/#!4/4519f/12
更新: 正如Jeffrey Kemp所说,您可以通过子查询“检测”最大值:
with num as (select level as rnk from dual connect by level<=(select max(repeat) from t) ) select job, quantity, status, repeat, rnk from t join num on ( num.rnk <= repeat ) order by job, rnk;