实际项目中一些实用SQL

1.case when

SELECT
A .GUID AS PROD_GUID,
A .GDNAME,
A .GZCZNO,
A .PRODUCER,
(CASE A.GUID
WHEN '222E836FC33B477F8AB22CDE1565724A' THEN '已生成'
ELSE '新增' END)
as status
FROM
XT_PRODUCT_FBZ A,DOC_OTHER_LIC o
WHERE
A .GUID IN ('222E836FC33B477F8AB22CDE1565724A','333E836FC33B477F8AB22CDE1565724A','444E836FC33B477F8AB22CDE1565724A')
GROUP BY
A .GUID,
A .GDNAME,
A .GZCZNO,
A .PRODUCER
ORDER BY
A .GDNAME

2.查询嵌套表数据
SELECT
i.*
FROM
doc_other_lic D,
TABLE (D .imgpath) I
WHERE
d.guid='333DA5A53C444942A613430982868354'

3.在嵌套表中插入数据
INSERT INTO THE (
SELECT
IMGPATH
FROM
DOC_OTHER_LIC
WHERE
guid = '333DA5A53C444942A613430982868354'
)
VALUES
(
'https://ss2.baidu.com/6ONYsjip0QIZ8tyhnq/it/u=2507907452,1782106577&fm=58',
'',
'2',
'3',
'4',
'5'
);

4.查询所有嵌套证照类型和每一种的数量
SELECT
D .lictype AS TYPE,
COUNT (D .lictype) AS COUNT
FROM
doc_other_lic D,
TABLE (D .imgpath) I
WHERE
D .sup_guid = '1A0774CDEBDA425DBEDA3BBAAF58023E'
AND D .h
4000
osp_guid = '2333609FBB4442239A5A285462C39FB1'
and d.PROD_GUID is null
GROUP BY
D .lictype;
5.读取某几行的数据（像oracle不提供此功能，一般分页或读取特定行数据时使用）
select * from(
SELECT scg.PUST_GUID,scg.PUST_NAME,rownum no
FROM DOC_SUP_CUST s,DOC_SUP_CUST_GOODS scg,DOC_CHANGE_OTHER_LIC co,DOC_CHANGE_DOC c
WHERE
co.GUID = '8BC2651DEC474C7C8E0C16BB6574B690'
AND s.HOSP_GUID = c.HOSP_GUID
AND s.SUP_GUID = c.SUP_GUID
AND co.DOC_CHANGEGUID = c.GUID
AND s.GUID = scg.SUP_CUST_GUID
GROUP BY scg.PUST_GUID,scg.PUST_NAME,rownum)where no>1 and no<3;

6.简单存储过程及存储过程中的数组使用
declare
TYPE list_type IS TABLE OF VARCHAR2(100) INDEX BY BINARY_INTEGER;
testlist list_type;
begin

FOR i IN 1 .. 3 LOOP
select PUST_GUID INTO testlist(i) from(
SELECT scg.PUST_GUID,scg.PUST_NAME,rownum no
FROM DOC_SUP_CUST s,DOC_SUP_CUST_GOODS scg,DOC_CHANGE_OTHER_LIC co,DOC_CHANGE_DOC c
WHERE
co.GUID = '3AD57E7B3D5C4569ACC588FA38895D92'
AND s.HOSP_GUID = c.HOSP_GUID
AND s.SUP_GUID = c.SUP_GUID
AND co.DOC_CHANGEGUID = c.GUID
AND s.GUID = scg.SUP_CUST_GUID
GROUP BY scg.PUST_GUID,scg.PUST_NAME,rownum)where no>i-1 and no<i+1 ;
END LOOP;
FOR i IN 1 .. testlist.count LOOP
Dbms_Output.put_line(testlist(i));
END LOOP;
end;

7.修改嵌套表数据
UPDATE THE (
SELECT
IMGPATH
FROM
DOC_OTHER_LIC
)
SET imagepath = '';

8.删除嵌套表数据
DELETE
FROM
THE (
SELECT
IMGPATH
FROM
DOC_OTHER_LIC
WHERE
guid='78ECAFBF1C144B7384EA6672A125CD81'
);
9.嵌套表去重
DELETE
FROM
THE (
SELECT
IMGPATH
FROM
doc_other_lic
WHERE
guid = '78ECAFBF1C144B7384EA6672A125CD80'
)
WHERE
ROWID NOT IN (
SELECT
MIN (i. ROWID)
FROM
doc_other_lic D,
TABLE (D .imgpath) i
WHERE
D .guid = '78ECAFBF1C144B7384EA6672A125CD80'
GROUP BY
i.imagepath
)
10.插入从另一张表查询出的数据
INSERT INTO DOC_CHANGE_OTHER_LIC c (
c.guid,
c.licobjtype,
c.lictype,
c.memo,
c.BEGRQ
)
SELECT
sys_guid(),
o.licobjtype,
o.lictype,
'CESHI22222222',
to_date('2015-1-30 12:20','YYYY-MM-DD HH24:MI')
FROM
DOC_OTHER_LIC o
WHERE
o.SUP_GUID = '1A0774CDEBDA425DBEDA3BBAAF58023E'
AND o.HOSP_GUID = '2333609FBB4442239A5A285462C39FB1'
AND o.lictype = '合同书'

未完待续。。。