Question

我有一个适用于Jaspersoft报告的MySQL SQL：

SELECT pr.id AS project_id,
   pr.project_name as project_name,
   pr.export_event_id,
   au.full_name,
   ee.timestamp 
FROM (
    SELECT project.id, project.project_name, MAX(project.export_event_id) AS max_export_event_id FROM project INNER JOIN export_event iee ON project.export_event_id = iee.id
    where IIF ($P{exportEventDate} IS NULL, TRUE, CONVERT(DATE, iee.timestamp) <= $P{exportEventDate})
      GROUP BY project_name
   ) AS in_PR INNER JOIN project AS pr ON pr.project_name = in_PR.project_name AND pr.export_event_id = in_PR.max_export_event_id
   INNER JOIN project_owner_base pob ON pob.id = pr.project_owner_id
   INNER JOIN export_event AS ee ON pr.export_event_id = ee.id
   INNER JOIN auth_user au ON pob.auth_user_id = au.id
   WHERE IIF ($P{projectOwner} IS NULL, TRUE, au.id = $P{projectOwner})

我正在尝试将其转换为SQL Server，但无法找出相应的内容。

将$ P {...}视为＆＃39;？＆＃39;在动态SQL中任何的想法？

Answer 1

我认为这只是一个简单的OR语句。

Where @ProjectOwner IS NULL
OR au.id = @ProjectOwner

Answer 2

您的查询非常接近。我会在任一数据库中完全删除IIF()。结果是这样的：

SELECT pr.id AS project_id,
       pr.project_name as project_name,
       pr.export_event_id,
       au.full_name,
       ee.timestamp 
FROM (SELECT p.project_name, MAX(p.export_event_id) AS max_export_event_id
      FROM project p INNER JOIN
           export_event iee
           ON p.export_event_id = iee.id
      WHERE ? IS NULL OR CONVERT(DATE, iee.timestamp) <= ?
      GROUP BY p.project_name
     ) in_PR INNER JOIN
     project pr
     ON pr.project_name = in_PR.project_name AND
        pr.export_event_id = in_PR.max_export_event_id INNER JOIN
     project_owner_base pob
     ON pob.id = pr.project_owner_id INNER JOIN
     export_event ee
     ON pr.export_event_id = ee.id INNER JOIN
     auth_user au
     ON pob.auth_user_id = au.id
WHERE ? IS NULL OR au.id = ?;

我将变量替换为?（根据您的问题建议）。以上内容适用于任一数据库。

请注意，这也会修复子查询中的聚合以删除p.id，这似乎是不必要的（并且应该在SQL Server中导致错误）。

将mysql sql转换为sql server

2 个答案: