如何正确编写SQL查询

Question

I am trying to write a SQL querybut am not sure how to properly do what I want to achieve. Right now I have

select id 
from job 
where status = 'NE' 
    or status = 'RU' 
    and queue = CONCAT('VA-', varVappId) 
    or queue = CONCAT('CL-', varClientId, '||', 'VA-', varVappId);

so basically if the job has a status of NE or a status of RU and queue matches either concat string then it should produce a result.

Answer 1

You should use parentheses to group together clauses.

select id 
from job 
where 
    (status = 'NE' or status = 'RU')
    and (queue = CONCAT('VA-', varVappId) 
    or queue = CONCAT('CL-', varClientId, '||', 'VA-', varVappId));

Answer 2

Missing Parenthesis.

select id 
from job 
where (status = 'NE' 
    or status = 'RU' )
    and (queue = CONCAT('VA-', varVappId) 
    or queue = CONCAT('CL-', varClientId, '||', 'VA-', varVappId));

or

select id 
from job 
where status in( 'NE','RU' )
    and (queue = CONCAT('VA-', varVappId) 
    or queue = CONCAT('CL-', varClientId, '||', 'VA-', varVappId));

Answer 3

In your where condition the OR condition should seperated from AND using (),So the OR condition will check first and it will combine with AND

select id 
from job 
        where (status = 'NE' or status = 'RU' ) and 
    (queue = CONCAT('VA-', varVappId) or 
    queue = CONCAT('CL-', varClientId, '||', 'VA-', varVappId));

Answer 4

There are some parameters missing, needed to group clauses. Also this is the general format, if that's something you needed too.

SELECT id 
  FROM job 
 WHERE status IN( 'NE','RU' )
       AND (queue = CONCAT('VA-', varVappId) 
       OR queue = CONCAT('CL-', varClientId, '||', 'VA-', varVappId));