我有一个查询,我在DISTINCT ON中使用CASE语句,如下所示: SELECT
DISTINCT ON(COALESCE(users.cuid,events.uid),CASE WHEN events.props->>'prop' IS NULL THEN '$none' WHEN events.props->>'prop' = '' THEN '$none' ELSEevents.pr
现在,我尝试了这样的代码,但它的工作并不像我预期的那样: employee, case when count(question_id = 1) or count(question_id = 2) > 0 then 1 else 0 end case when count(question_id = 3) or count(question_id
我在Postgres上工作,我有两个表vehicles和vehicles_flag。这两个表之间没有关系,因此我们无法连接两个表来获取所需的数据。我的目标是实现这样的结果,但事实证明case语句需要更高的输出: select count(id) from vehiclesvehicles.id in (case
when @hasbluetooth=1 then (select distinct id from vehicle_flags where flag='bluetooth' a
我有一个spring应用程序,我有一个具有以下语法的原生查询: COUNT(DISTINCT person.id,(CASE WHEN salary_person.rating= 'Satisfactory' THEN 1 END)) AS totalSatisfactory,
COUNT(DISTINCT person.id,(CASE WHEN salary_person.rating
with_parts = a.with_parts, FROM (SELECT CASEWHEN count(*) > 0 THEN (SELECT DISTINCT ON (machine_id) with_parts, amc_validity_upto, machine_idwith_parts, NULL AS amc_validity_upto, 2 AS machine_id)