Question

有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表格的其他位置。

我想要做的还是添加由特定用户添加的歌曲ID以免除，但只有当该用户添加时，他们才会被其他人添加时免除（除非特别在豁免列表中）上文）。

我在想（伪）这样的东西：

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部分当前为：

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

但是如果被其他人添加的话，就不能想到如何不允许使用该歌曲。

e.g。

如果用户matt添加了歌曲ID 12345并且另一个用户添加了它，我希望它在播放列表中被免费播放时可以免除。

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

然后我们还没有改变其他多个错误......

Answer 1

您需要创建一个唯一的ID，即SongId和addedbyuser连接。 chr（39）的东西只是创建一个列表，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],

Qlikview CASE语句或子查询在加载和应用映射中

1 个答案: