REGEXP_SUBSTR 结合 CONECT BY LEVEL 代码语言:sql AI代码解释 SELECTregexp_substr(temp.STUDENT,'[^,]+',1,level)STUDENTFROM(SELECT'Student001,Student002,Student003'STUDENTFROMdual)tempCONNECTBYlevel<=REGEXP_COUNT('Student001,Student002,Student003','[^,]+');--Student001--Student002--Student003 ...
2)在oracle中rownum和level都是自动生成数字序列集合,结合connect by使用 selectDISTINCT regexp_substr('A,B,C,D,E,F','[^,]+',1,level)fromDUAL connect by level<= length('A,B,C,D,E,F') - length(replace('A,B,C,D,E,F',',','')) +1;selectDISTINCT regexp_substr('A,B,C,D,E,...
需要返回多行,可以采用oracle的connect by 命令,行数的获得通过length来获得。 select regexp_substr(‘2001,2002,200103,2005’, ‘[^,]+’, 1, level, ‘i’) as str from dual connect by level <= length(‘2001,2002,200103,2005’) - length(regexp_replace(‘2001,2002,200103,2005’, ‘,’,...
SELECT LEVEL FROM DUAL CONNECT BY LEVEL <=7; 结果: www.2cto.com LEVEL --- 1 2 3 4 5 6 7 4、将上面REGEXP_SUBSTR的occurrence关联 [sql] SELECT NVL(REGEXP_SUBSTR('17,20,23', '[^,]+', 1, LEVEL, 'i'), 'NULLL') AS STR FROM DUAL CONNECT BY LEVEL <= 7; STR www.2cto.c...
regexp_substr(DESCR, '[^/]+', 1, level) value from RFDGENERIC where id = 14966150 connect by level <= length(DESCR) - length(replace(DESCR, '/')) + 1 and prior DESCR = DESCR and prior sys_guid() is not null; 但结果是。
select distinct regexp_substr('020101:1:13,020101:1:175,020301:1:107+020401:1:140-020501:1:107,020301:1:107*020401:1:140/020501:1:107','[^,|+|*|/|-]+', 1, level) as str from dual connect by level <= regexp_count('020101:1:13,020101:1:175,020301:1:107+020401...
SELECTREGEXP_SUBSTR(string, '[^特定字符]+', 1, LEVEL, 'i')as分割后结果 FROMDUAL CONNECTBYLEVEL<=特定字符在字符串当中出现的次数+1; 1. 2. 3. 4. 5. 6. 7. 进一步优化 SELECTREGEXP_SUBSTR(string, '[^特定字符]+', 1, LEVEL, ...
ORACLE -返回空值的regexp_substr ORACLE是一种关系型数据库管理系统(RDBMS),它提供了广泛的功能和工具,用于管理和处理大量的结构化数据。在云计算领域中,ORACLE提供了云数据库服务,使用户能够在云环境中轻松部署和管理数据库。 "返回空值的regexp_substr"是一个正则表达式函数,用于在字符串中查找匹配指定模式的子字...
SELECT regexp_substr('This is a test. My em本人l is xxx and another em本人l is xxx', '[A-Za-z0-9._+-]+[A-Za-z0-9.-]+\.[A-Za-z]{2,4}', 1, level) AS em本人l FROM dual CONNECT BY regexp_substr('This is a test. My em本人l is xxx and another em本人l is xxx',...
SELECT REGEXP_SUBSTR('17,20,23','[^,]+',1,3,'i') AS STR FROM DUAL; 结果: STR --- 23 3、获取一个多个数值的列,从而能够让结果以多行的形式展示出来 [sql] SELECT LEVEL FROM DUAL CONNECT BY LEVEL <=7; 结果: LEVEL --- 1 ...