如何使用with子句和union sqlserver

Question

我想在下面的查询中对每个位置使用with子句使用union。我尝试了多种方式，但一直没有能够得到这个工作。然后我想创建一个查询。

WITH MaxLoadId AS 
(
select MAX(t.loadid) AS loadid, p.partitionkey, p.partdesc, p.partname 
FROM tdataseg t 
    INNER JOIN part p ON t.partitionkey = p.partitionkey 
WHERE p.partname = 'MEXICO' 
GROUP BY p.partitionkey, p.partdesc, p.partname 
) 
select distinct 
mli.loadid AS loadid, 
a.process_id, 
mli.partitionkey, 
-- t.partitionkey, 
mli.partdesc, 
mli.partname, 
c.catname, 
r.rule_name, 
r.file_path, 
a.execution_start_time, 
a.execution_end_time, 
a.records_processed, 
a.status, 
a.last_updated_by as processed_by, 
a.last_update_date 
FROM MaxLoadId mli 
INNER JOIN datat ON mli.loadid = t.loadid 
INNER JOIN details a ON mli.loadid = a.process_id 
INNER JOIN category c ON t.catkey = c.catkey 
INNER JOIN balances r ON t.RULE_ID = r.RULE_ID; 

Answer 1

你的意思是像下面的代码示例吗？您可以首先指定多个公用表表达式，并在每个表达式之间以逗号分隔，然后编写引用每个CTE的常规联合查询。

CREATE VIEW dbo.MyView AS 
WITH MaxLoadId AS 
(
select MAX(t.loadid) AS loadid, p.partitionkey, p.partdesc, p.partname 
FROM tdataseg t 
    INNER JOIN part p ON t.partitionkey = p.partitionkey 
WHERE p.partname = 'MEXICO' 
GROUP BY p.partitionkey, p.partdesc, p.partname 
) 
,MaxLoadId_Australia AS 
(
select MAX(t.loadid) AS loadid, p.partitionkey, p.partdesc, p.partname 
FROM tdataseg t 
    INNER JOIN part p ON t.partitionkey = p.partitionkey 
WHERE p.partname = 'Australia' 
GROUP BY p.partitionkey, p.partdesc, p.partname 
) 
select distinct 
mli.loadid AS loadid, 
a.process_id, 
mli.partitionkey, 
-- t.partitionkey, 
mli.partdesc, 
mli.partname, 
c.catname, 
r.rule_name, 
r.file_path, 
a.execution_start_time, 
a.execution_end_time, 
a.records_processed, 
a.status, 
a.last_updated_by as processed_by, 
a.last_update_date 
FROM MaxLoadId mli 
INNER JOIN datat ON mli.loadid = t.loadid 
INNER JOIN details a ON mli.loadid = a.process_id 
INNER JOIN category c ON t.catkey = c.catkey 
INNER JOIN balances r ON t.RULE_ID = r.RULE_ID 

UNION ALL 

select distinct 
mli.loadid AS loadid, 
a.process_id, 
mli.partitionkey, 
-- t.partitionkey, 
mli.partdesc, 
mli.partname, 
c.catname, 
r.rule_name, 
r.file_path, 
a.execution_start_time, 
a.execution_end_time, 
a.records_processed, 
a.status, 
a.last_updated_by as processed_by, 
a.last_update_date 
FROM MaxLoadId_Australia mli 
INNER JOIN datat ON mli.loadid = t.loadid 
INNER JOIN details a ON mli.loadid = a.process_id 
INNER JOIN category c ON t.catkey = c.catkey 
INNER JOIN balances r ON t.RULE_ID = r.RULE_ID