group by where条件的设置
2012-06-07 15:57
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/*
where要放在group by前面
group by 后面加条件只能用having关键字
*/
select case_id, count(*) from td
inner join TD_PROC proc
on td.wf_proc_id = proc.businessid
and proc.type != 'done'
where case_id is not null --where要放在group by前面
group by case_id
--可用having case_id is not null
where要放在group by前面
group by 后面加条件只能用having关键字
*/
select case_id, count(*) from td
inner join TD_PROC proc
on td.wf_proc_id = proc.businessid
and proc.type != 'done'
where case_id is not null --where要放在group by前面
group by case_id
--可用having case_id is not null
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