declare
v_community_type_name communitytype.name%type;
begin
select c.name into v_community_type_name
from communitytype c
where c.community_type_id = '&community_type_id';
case
when v_community_type_name = '電子圖書'
then
dbms_output.put_line('查詢到電子圖書');
when v_community_type_name = '新書快讀'
then
dbms_output.put_line('查詢到新書快讀');
else
dbms_output.put_line('查詢到其他資源庫');
end case;
end;
case when 也可用於查詢語句
select
case
when id is null and parent_id is null
then 'yzhnykxyjs'
when id is null and parent_id is not null
then parent_id
else id
end id,
case
when id is null and parent_id is null
then (select com.name from community com where com.community_id = 'yzhnykxyjs')
when id is null and parent_id is not null
then (select com.name from community com where com.community_id = parent_id)
else (select col.name from collection col where col.collection_id = id)
end name,
case
when id is null and parent_id is null
then '0'
when id is null and parent_id is not null
then 'yzhnykxyjs'
else parent_id
end parent_id,
case
when id is null and parent_id is null
then 'community'
when id is null and parent_id is not null
then 'zsk'
else 'collection'
end object_type,
count
from
(select cc.collection_id id,count(1) count,cc.community_id parent_id
from community com
join community2community c2c on c2c.community_id = com.community_id and c2c.parent_community_id = 'yzhnykxyjs'
join community2collection cc on cc.community_id = c2c.community_id
join collection col on col.collection_id = cc.collection_id and col.withdrawn = 'n'
join collection2item c2i on c2i.collection_id = col.collection_id
join item i on i.item_id = c2i.item_id and i.withdrawn = 'n'
where not exists (select 1 from community2institution c2i where c2i.community_id = com.community_id)
and com.withdrawn = 'n'
group by rollup(cc.community_id,cc.collection_id)) allcom
輸出如下:
[list]
1 qt_2934 參加會議情況 qt collection 3
2 qt_2935 實驗室活動記事 qt collection 2
3 qt_2936 無法歸類卻有必要儲存 qt collection 3
4 qt 其它 yzhnykxyjs zsk 8
5 cgk_2529 發明專利 cgk collection 27
6 cgk_2530 科技成果 cgk collection 23
7 cgk_2727 圖書著作 cgk collection 10
8 cgk_3328 品種庫 cgk collection 5
9 cgk 成果庫 yzhnykxyjs zsk 65
10 xmk_2729 專案經費 xmk collection 1
11 xmk_2730 在研專案 xmk collection 5
12 xmk_2926 完成專案 xmk collection 17
13 xmk 專案庫 yzhnykxyjs zsk 23
14 jxgz_2531 教學課件 jxgz collection 1
15 jxgz 教學工作 yzhnykxyjs zsk 1
16 shfw_2928 農業推廣 shfw collection 1
17 shfw_2929 企業合作 shfw collection 1
18 shfw 社會服務 yzhnykxyjs zsk 2
19 xslw_2472 期刊** xslw collection 254
20 xslw_2526 會議** xslw collection 17
21 xslw_2527 學位** xslw collection 32
22 xslw_3597 jkljkl xslw collection 1
23 xslw 學術** yzhnykxyjs zsk 304
24 xspy_2533 碩士研究生 xspy collection 6
25 xspy_2534 博士研究生 xspy collection 6
26 xspy_2535 博士後 xspy collection 2
27 xspy 學生培養 yzhnykxyjs zsk 14
28 jssrcsml_2930 中文書刊 jssrcsml collection 1
29 jssrcsml 教師私人藏書目錄 yzhnykxyjs zsk 1
30 yzhnykxyjs 浙江大學原子核農業科學研究所 0 community 418
[/list]
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