加载和应用映射中的 Qlikview CASE 语句或子查询

Question

有一个内联加载，我必须将歌曲 ID 添加到豁免列表中：

Exemptsongs:

Load * Inline [
Song ID
45875
65463
43785
90347
23456
89438
16745
];

Exemptsongsmap:
Mapping LOAD
[Song ID],'Exempt' as [Exempt songs exempt]
Resident Exemptsongs;

DROP Table Exemptsongs;

然后在需要时将其加载到播放列表的其他位置 table。

我想做的也是将特定用户添加的歌曲 ID 添加为豁免，但只有当该用户添加时，其他任何人添加时它们才不会豁免（除非在上述豁免名单）。

我在想（伪）是这样的：

Exemptsongs:

Load * Inline [
Song ID
45875
65463
43785
90347
23456
89438
16745
(SELECT SongID FROM Songs WHERE addedbyuser = 'MATT')
];

Exemptsongsmap:
Mapping LOAD
[Song ID],'Exempt' as [Exempt songs exempt]
Resident Exemptsongs;

DROP Table Exemptsongs;

然后在加载播放列表时，applymap 部分当前是这样的：

ApplyMap('Exemptsongsmap',[Playlist ID],'Non-exempt') as [Exempt songs exempt],

但是想不出如果songid也是别人加的，怎么不让songid免除。

例如

如果用户 matt 添加了歌曲 ID 12345 并且另一个用户添加了它，我希望它在 matt 添加时在播放列表中被豁免。

错误 1：

Syntax error, missing/misplaced FROM:

Exemptsongs:

Load [Song ID]& as UniqueID Inline [
Song ID
45875
65463
43785
90347
23456
89438
16745
]
Exemptsongs:

Load [Song ID]& as UniqueID Inline [
Song ID
45875
65463
43785
90347
23456
89438
16745
]

错误 2：

Field not found - <Song ID>
load [Song ID]&addedbyuser as UniqueID 
from Songs 
where addedbyuser='Matt';

错误 3：

Table not found
Exemptsongsmap:
Mapping LOAD Distinct
UniqueID,'Exempt' as [Exempt songs exempt]
Resident Exemptsongs

错误 4：

Table not found
DROP TABLES statement

然后我们还没有更改的其他多个错误...

Answer 1

您需要创建一个唯一的 Id，它是 SongId 和 addedbyuser 连接在一起的。 chr(39) 的东西只是为了创建一个列表，每个值都为 'value'.

USERS:
load concat(distinct addedbyuser,chr(39)&','&chr(39)) as userids from Songs;

let vList = chr(39)&fieldvalue('userids',1)&chr(39);;

for each a in $(vList)

ExemptSongs:
Load [Song ID]&$(a) as UniqueID; 
Inline [
Song ID
45875
65463
43785
90347
23456
89438
16745
];

next a

//Allow auto concatenate of these tables
load [Song ID]&addedbyuser as UniqueID 
from Songs 
where addedbyuser='Matt';

Exemptsongsmap:
Mapping LOAD distinct
UniqueID,'Exempt' as [Exempt songs exempt]
Resident Exemptsongs;

DROP Table Exemptsongs;

然后最后

ApplyMap('Exemptsongsmap',[Playlist ID]&addedbyuser,'Non-exempt') as [Exempt songs exempt],

加载和应用映射中的 Qlikview CASE 语句或子查询

Qlikview CASE statement or subquery inside a load and apply map

mapping

case

subquery

qlikview