相当于在sql脚本中选择

Question

我在将job_num_to_run变量设置为sql脚本中的实际job_id时遇到问题。下面的示例将要运行的作业数设置为字符串文字“select max ...”并且不评估该值。我尝试了许多不同的方法但没有成功。任何帮助将不胜感激。谢谢

def job_num_to_run = select max(job_id) from job_table;

update job_table
   set processed = 'Y' where job_id = &job_num_to_run;

Answer 1

DECLARE @job_num_to_run INT = select max(job_id) from job_table;

update job_table
set processed = 'Y' 
where job_id = @job_num_to_run;

INT可以是job_id的数据类型

Answer 2

Update job_table set processed = 'Y' where job_id = (select max(job_id) from job_table)