下面的Oracle查询采用逗号分隔的值列表(如'3,4' ),并在单独的行中返回其单独的标记3和4。FROM DUAL CONNECT BYREGEXP_SUBSTR('3,4', '[^,]+', 1, LEVEL 浏览3提问于2016-11-28得票数0 2回答 MYSQLREGEXP_SUBSTR:从文本中获取字符串或ip 、、 我在一个复杂的查询中挣扎,需要帮助处理WHERE子句中使用...
因为xxdddddd中的xx和dddddd,位置是固定的,所以用substr解析,通过||'.'...(1)和(2)的中间结果集,如下所示, SQL> SELECT substr(regexp_substr(a, '[^,]+',1,level),3,7)||'.'...函数可以用group_concat替代,regexp_substr在MySQL 5.x中是不支持的,而且connect by level是没有直接能用的,据...
Description: An aggregate function and group by with regexp_substr() result as wrong How to repeat: 1、version: select version(); +---+ | version() | +---+ | 8.0.13 | +---+ 1 row in set (0.00 sec) 2、desc table info: show create table test_ak\G *** 1. row *** Tabl...
withtas(selectdeptno,listagg(ename,',')withingroup(orderbyempno)asyonghufromempwheredeptnoisnotnullgroupbydeptno)selectdeptno,yonghu,regexp_substr(yonghu,'[^,]+',1,2)assubfromt; DEPTNO YONGHU SUB--- --- ---10CLARK,KING,MILLER KING20SMITH,JONES,SCOTT,ADAMS,FORD ...
REGEXP_SUBSTR(source-string ,pattern-expression ,start,occurrence,flags,group ,CODEUNITS32,CODEUNITS16OCTETS ) The schema is SYSIBM. source-string An expression that specifies the string in which the search is to take place. This expression must return a built-in character string, graphic string...
2 from emp 3 group by deptno;DEPTNO YONGHU--- --- 10 CLARK,KING,MILLER 20 SMITH,JONES,SCOTT,ADAMS,FORD 30 ALLEN,WARD,MARTIN,BLAKE,TURNER,JAMES test四、如何使用substr或regexp_substr提取第N个分隔符的子串有如下临时表,每个部门的员工以逗号分隔:SQL> select deptno,listagg...
若使用了WMSYS.WM_CONCAT函数,应尽量不要对查询结果进行distinct,union,和group by操作,避免oracle版本的差异化 regexp_substr(): 格式 REGEXP_SUBSTR (source_string, pattern[, position [, occurrence [, return_option [, match_parameter]] ] ]
REGEXP_SUBSTR延伸SUBSTR函数的功能。让你搜索一个正則表達式模式字符串。 这也相似于REGEXP_INSTR。而是返回子字符串的位置,它返回的子字符串本身。 语法 Oracle数据库中的REGEXP_SUBSTR函数的语法是: REGEXP_SUBSTR(source_char, pattern [, position [, occurrence [, match_parameter ]]]) ...
-> https://mariadb.org SELECT REGEXP_SUBSTR('ABC','b'); -> B SELECT REGEXP_SUBSTR('ABC' COLLATE utf8_bin,'b'); -> SELECT REGEXP_SUBSTR(BINARY'ABC','b'); -> SELECT REGEXP_SUBSTR('ABC','(?i)b'); -> B SELECT REGEXP_SUBSTR('ABC' COLLATE utf8_bin,'(?+i)b'); ...
(EVENT_DESC, ',') WITHIN GROUP (ORDER BY EVENT_DESC) FROM EVENT_REF WHERE EVENT_ID IN ( SELECT to_number(REGEXP_SUBSTR(AFTER_VALUE,'\d+', 1, level)) FROM DUAL CONNECT BY level<=REGEXP_COUNT(AFTER_VALUE, '\d+') ) ) from ( select '1' AFTER_VALUE from dual union all select...