在加入 2 个表时需要帮助

Question

我需要加入 2 tables 并分配 0（HoursBilled 列）并且所有月份都出现在每个唯一 AuthId 的 BilledHours table 中。

First table (AuthHours) 具有每个 ClientId 的数据及其在每个唯一 AuthId 的不同日期范围内的允许小时数（每月）。

create table AuthHours
(AuthId INT, ClientId INT, AuthStartDate DATE, AuthEndDate DATE, AllowedHoursPerMonth Float);

INSERT INTO AuthHours
VALUES
(123, 55, '2021-12-19', '2022-03-17', 43.0),
(109, 55, '2021-12-19', '2022-03-17', 9.0),
(218, 55, '2021-12-19', '2022-03-17', 6.0),
(619, 55, '2021-12-19', '2022-03-17', 43.0),
(777, 55, '2021-12-19', '2022-03-17', 43.0),
(345, 55, '2022-03-18', '2022-07-28', 40.0),
(346, 55, '2022-03-18', '2022-07-28', 12.0),
(395, 55, '2022-03-18', '2022-07-28', 10.0),
(487, 55, '2022-03-18', '2022-07-28', 45.0),
(198, 55, '2022-03-18', '2022-07-28', 37.0)

SELECT * FROM AuthHours

第二个 table (BilledHours)（已按 ClientId、AuthId、月份和年份分组）具有每个的数据每个 AuthId 和每月的 ClientId 及其已经计费小时数。

create table BilledHours
(ClientId INT, Month VARCHAR(10), Year INT, AuthId INT, HoursBilled Float);

INSERT INTO BilledHours
VALUES
(55, 'January', 2022, 123, 26.33),
(55, 'January', 2022, 109, 4.25),
(55, 'January', 2022, 777, 2.5),
(55, 'February', 2022, 123, 32.5),
(55, 'February', 2022, 109, 4.25),
(55, 'February', 2022, 777, 1.5)

SELECT * FROM BilledHours

我需要为每个不在 BilledHours table 中的 AuthId 分配 0 HoursBilled，但如果今天日期不在 AuthStartDate 和 AuthEndDate 日期范围之间，则将其保留为 NULL。此外，需要为每个不在 BilledHours table.

中的 AuthId 添加 BilledHours table 中出现的月份和年份

我的加入，但它是错误的（很明显）。

SELECT  AuthHours.AuthId,
        AuthHours.ClientId,
        AuthHours.AuthStartDate,
        AuthHours.AuthEndDate,
        BilledHours.Month,
        BilledHours.Year,
        AuthHours.AllowedHoursPerMonth,
        BilledHours.HoursBilled
        
FROM AuthHours
LEFT JOIN BilledHours
  ON (AuthHours.AuthId = BilledHours.AuthId) AND (AuthHours.ClientId = BilledHours.ClientId)

输出不正确：

AuthId	ClientId	AuthStartDate	AuthEndDate	Month	Year	AllowedHoursPerMonth	HoursBilled
123	55	2021-12-19	2022-03-17	January	2022	43	26.33
123	55	2021-12-19	2022-03-17	February	2022	43	32.5
109	55	2021-12-19	2022-03-17	January	2022	9	4.25
109	55	2021-12-19	2022-03-17	February	2022	9	4.25
218	55	2021-12-19	2022-03-17	NULL	NULL	6	NULL
619	55	2021-12-19	2022-03-17	NULL	NULL	43	NULL
777	55	2021-12-19	2022-03-17	January	2022	43	2.5
777	55	2021-12-19	2022-03-17	February	2022	43	1.5
345	55	2022-03-18	2022-07-28	NULL	NULL	40	NULL
346	55	2022-03-18	2022-07-28	NULL	NULL	12	NULL
395	55	2022-03-18	2022-07-28	NULL	NULL	10	NULL
487	55	2022-03-18	2022-07-28	NULL	NULL	45	NULL
198	55	2022-03-18	2022-07-28	NULL	NULL	37	NULL

我需要的输出：

AuthId	ClientId	AuthStartDate	AuthEndDate	Month	Year	AllowedHoursPerMonth	HoursBilled
123	55	2021-12-19	2022-03-17	January	2022	43	26.33
123	55	2021-12-19	2022-03-17	February	2022	43	32.5
109	55	2021-12-19	2022-03-17	January	2022	9	4.25
109	55	2021-12-19	2022-03-17	February	2022	9	4.25
218	55	2021-12-19	2022-03-17	January	2022	6	0
218	55	2021-12-19	2022-03-17	February	2022	6	0
619	55	2021-12-19	2022-03-17	January	2022	43	0
619	55	2021-12-19	2022-03-17	February	2022	43	0
777	55	2021-12-19	2022-03-17	January	2022	43	2.5
777	55	2021-12-19	2022-03-17	February	2022	43	1.5
345	55	2022-03-18	2022-07-28	NULL	NULL	40	NULL
346	55	2022-03-18	2022-07-28	NULL	NULL	12	NULL
395	55	2022-03-18	2022-07-28	NULL	NULL	10	NULL
487	55	2022-03-18	2022-07-28	NULL	NULL	45	NULL
198	55	2022-03-18	2022-07-28	NULL	NULL	37	NULL

Answer 1

我更改了查询以反映您在 month/year 请求中寻找的更多内容

select
    distinct
    a.authid,
    a.clientid,
    a.authstartdate,
    a.authenddate,
    case when a.hoursbilled is null then null else a.month end as month,
    case when a.hoursbilled is null then null else a.year end as year,
    a.allowedhourspermonth,
    a.hoursbilled
from 
    (
        select
        a.authid,
        a.clientid,
        a.authstartdate,
        a.authenddate,
        a.allowedhourspermonth,
        a.month,
        a.year,
        case 
            when a.hoursbilled is null and getdate() between cast(a.authstartdate as date) and cast(a.authenddate as date) then 0
            when a.hoursbilled is null and getdate() not between cast(a.authstartdate as date) and cast(a.authenddate as date) then null
            else a.hoursbilled 
        end as hoursbilled
    from 
        (
        SELECT 
            a.authid,
            a.clientid,
            a.authstartdate,
            a.authenddate,
            a.allowedhourspermonth,
            b.month,
            b.year,
            b.hoursbilled
        FROM 
            (
            select
                d.clientid,
                d.month,
                d.year,
                d.authid,
                b.hoursbilled
            from 
                (
                    select
                        distinct
                        a.clientid,
                        a.authid,
                        month,
                        year
                    from BilledHours b 
                        join AuthHours a on 1=1
                ) d 
                left join BilledHours b on b.authid = d.authid and d.clientid = b.clientid and d.month = b.month and b.year = d.year
            ) b 
                left join AuthHours a on a.clientid = b.clientid and a.authid = b.authid
        ) a
    ) a

这是一个没有 CAL_DM table 的选项，但如果您的公司还没有 CAL_DM table，我建议投资。

在加入 2 个表时需要帮助

Need assistance in Joining 2 tables

sql

sql-server

join