Oracle 工作语句记录

SELECT LEVEL l FROM dual CONNECT BY LEVEL<=5------------------华丽的分隔线----------with tas(select '男;女;其他' txt from dual)select regexp_substr(txt,'[^;]+',1,level) txt from t connect by  level<=length(txt)-length(replace(txt,';',''))+1或with tas(select '项目1;项目2;项目3' txt from dual)select regexp_substr(txt,'[^;]+',1,level) cc from t connect by  level<=REGEXP_COUNT(txt,';')+1------------------华丽的分隔线---------- SELECT * FROM (
SELECT EXTRACT(year from sysdate)-2 year from dual
UNION
SELECT EXTRACT(year from sysdate)-1 year from dual
UNION
SELECT EXTRACT(year from sysdate) year from dual
UNION
SELECT EXTRACT(year from sysdate)+1 year from dual
UNION
SELECT EXTRACT(year from sysdate)+2 year from dual
)A等价于SELECT EXTRACT(year from sysdate)-3+LEVEL year  from dual CONNECT BY LEVEL<=5或SELECT to_char(sysdate,'yyyy')-3+LEVEL year  from dual CONNECT BY LEVEL<=5------------------华丽的分隔线---------------- 把'2013-01'转成'201301'这种格式的select  to_char(to_date('2013-01','yyyy-MM'),'yyyyMM') aa from dual  ------------------华丽的分隔线---------------- 告诉一开始年月和结束年月，查出中间所有年月SELECT  to_char(add_months(to_date('2013-01','yyyy-MM'),LEVEL-1),'yyyy-MM')  NY  from dual CONNECT BY LEVEL<= (select months_between(to_date('2013-12','yyyy-MM'),to_date('2013-01','yyyy-MM'))+1 "MONTHS" FROM DUAL)------------------华丽的分隔线---------------- SELECT tb.*,to_char(PLANSTART, 'yyyy-mm-dd') KG_PLANDATE,to_char(PLANEND, 'yyyy-mm-dd') JG_PLANDATE FROM table(DMJS_GetDWSSPRJ('cy9tb')) tb------------------华丽的分隔线---------------- create table DEP(DEPID      number(10) not null,DEPNAME    varchar2(256),UPPERDEPID number(10));INSERT INTO DEP(DEPID, DEPNAME, UPPERDEPID) VALUES (0, '总经办', null); INSERT INTO DEP(DEPID, DEPNAME, UPPERDEPID) VALUES (1, '开发部', 0); INSERT INTO DEP(DEPID, DEPNAME, UPPERDEPID) VALUES (2, '测试部', 0); INSERT INTO DEP(DEPID, DEPNAME, UPPERDEPID) VALUES (3, 'Sever开发部', 1); INSERT INTO DEP(DEPID, DEPNAME, UPPERDEPID) VALUES (4, 'Client开发部', 1);INSERT INTO DEP(DEPID, DEPNAME, UPPERDEPID) VALUES (5, 'TA测试部', 2); INSERT INTO DEP(DEPID, DEPNAME, UPPERDEPID) VALUES (6, '项目测试部', 2);SELECT RPAD( ' ', 2*(LEVEL-1), '-' ) || DEPNAME "DEPNAME",CONNECT_BY_ROOT DEPNAME "ROOT",CONNECT_BY_ISLEAF "ISLEAF",LEVEL ,SYS_CONNECT_BY_PATH(DEPNAME, '/') "PATH"FROM DEPSTART WITH UPPERDEPID IS NULLCONNECT BY PRIOR DEPID = UPPERDEPID;------------------华丽的分隔线---------------- --列累加WITH T AS(SELECT 1 ID, '一车队' NAME, '2013-10-01' MONTH, 10 AMOUNT FROM DUAL   UNION ALL SELECT 2, '一车队', '2013-10-02', 20 FROM DUAL   UNION ALL SELECT 3, '一车队', '2013-10-03', 40 FROM DUAL   UNION ALL SELECT 4, '二车队', '2013-10-01', 30 FROM DUAL   UNION ALL SELECT 5, '二车队', '2013-10-02', 20 FROM DUAL   UNION ALL SELECT 6, '二车队', '2013-10-03', 50 FROM DUAL)SELECT NAME, MONTH, AMOUNT, SUM(AMOUNT) OVER(PARTITION BY NAME ORDER BY MONTH) ACC FROM T------------------华丽的分隔线---------------- --有则更新，无则添加MERGE INTO ORDER_INFO_ALL A--源表USING (SELECT A.ORDER_CODE, A.ITEM_NAME, P.ITEM_PRICE FROM ORDER_INFO A LEFT JOIN ORDER_INFO_PRICE P ON P.ORDER_CODE=A.ORDER_CODE) P--目标表ON(P.ORDER_CODE=A.ORDER_CODE)WHEN MATCHED THEN UPDATE SET A.ITEM_PRICE=P.ITEM_PRICEWHEN NOT MATCHED THEN INSERT (ORDER_CODE, ITEM_NAME, ITEM_PRICE) VALUES (P.ORDER_CODE, P.ITEM_NAME, P.ITEM_PRICE)------------------华丽的分隔线---------------- CREATE TABLE T_INFO(T_PERSON_ID NUMBER,T_PERSON_NAME VARCHAR(20),T_TYPE_ID VARCHAR(200));INSERT INTO T_INFO SELECT 1, '张三', '1,2' FROM DUAL UNION ALL SELECT 2, '李四', '1' FROM DUAL/*结果2        李四        011        张三        021        张三        01把      1        张三        01,02这条记录分成1        张三        021        张三        01*/create table T_INFO_Test as select * from T_INFO where rownum <1;declarel_i number;l_p number;l_times number;l_str varchar2(10);beginfor x in (select * from T_INFO) loopl_i := 1;l_times := length(x.T_TYPE_ID) - length(replace(x.T_TYPE_ID, ',', '')) + 1;for y in 1 .. l_times loopl_p := l_i;l_i := instr(x.T_TYPE_ID || ',', ',', l_i) + 1;l_str := substr(x.T_TYPE_ID, l_p, l_i - l_p - 1);insert into T_INFO_Test values (x.T_PERSON_ID, x.T_PERSON_NAME, l_str);end loop;end loop;commit;end;select * from T_INFO_Test;或select T_PERSON_ID,T_PERSON_NAME,regexp_substr(T_TYPE_ID, '[^,]+', 1, level) T_TYPE_IDfrom t_infoconnect by level <= regexp_count(T_TYPE_ID, ',') + 1and T_PERSON_ID = prior T_PERSON_IDand prior dbms_random.value is not null;或     select distinct T_PERSON_ID,T_PERSON_NAME,regexp_substr(T_TYPE_ID, '[^,]+', 1, level) T_TYPE_IDfrom t_infoconnect by level <= regexp_count(T_TYPE_ID, ',') + 1;------------------华丽的分隔线(剔除表数据)---------------- SELECT EVENTID,PRJNM,CASE WHEN ID IS NOT NULL THEN PARENTNO ELSE '0' END PARENTNO,PRJCODEFROM(SELECT * FROM table(DMJS_GetDWSSPRJ('cy9tb'))  A where eventid not in (select xmmc from dmjs_xmhtxx)) A LEFT JOIN(SELECT a.EVENTID ID,a.PARENTNO PID FROM table(DMJS_GetDWSSPRJ('cy9tb')) A  where eventid not in (select xmmc from dmjs_xmhtxx)) B ON A.PARENTNO = B.ID--------------------------------------------------------------------------------with t as(SELECT  to_char(sysdate,'yyyy')-3+LEVEL D_YEAR  from dual CONNECT BY LEVEL<=5)select D_year, to_char(LEVEL)||'月份' M_Month  from t CONNECT BY LEVEL<=12  and d_year=prior d_year and prior dbms_random.value is not null;with t as(SELECT  to_char(sysdate,'yyyy')-3+LEVEL D_YEAR  from dual CONNECT BY LEVEL<=10 )SELECT D_YEAR, REGEXP_SUBSTR('01;02;03;04;05;06;07;08;09;10;11;12', '[^;]+', 1, LEVEL)||'月份'  M_Month FROM t CONNECT BY LEVEL<=12 and d_year=prior d_year and prior dbms_random.value is not null;--------------------------查找最近的日期----------------------------------------------select t.*,row_number() over(partition by well_id order by STATUS_DATE desc) rn from CD_WELL_STATUS_HISTORY t--------------------------ListAgg行转列-----------------------------------------------with temp as(select '中国' nation,'北京' city  from dual union allselect '中国','上海' from dual union allselect '中国','武汉' from dual union allselect '美国','华盛顿' from dual union allselect '美国','纽约' from dual union allselect '日本','东京' from dual )--select nation,listagg(city,',')  within group (order by city desc) city  from temp group by nation ;select nation,listagg(city,',')  within group(order by city) over (partition by nation) city  from temp;

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