dbms:oracle:devel:regexp:regexp_substr

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--- dbms:oracle:devel:regexp:regexp_substr [2017/10/31 09:06]
starlits [뒷자리 4자리만 가져오기]
+++ dbms:oracle:devel:regexp:regexp_substr [2019/03/05 00:40] (현재)
starlits [구분자로 나누기]
@@ 줄 25: / 줄 25: @@
 ==== 방법 1 ====
-  - STUDYUNITCODE를 숫자와 문자를 분리하여 나타낸다. (맨 앞에 0은 삭제한다.) <code>
+  - STUDYUNITCODE를 숫자와 문자를 분리하여 나타낸다. (맨 앞에 0은 삭제한다.) <code sql>
 SELECT
     STUDYUNITCODE,
-    REGEXP_SUBSTR(REGEXP_REPLACE(STUDYUNITCODE,\'^0\',\'\'),\'[[:digit:]]{1,2}\') TAPE,
+    REGEXP_SUBSTR(REGEXP_REPLACE(STUDYUNITCODE,'^0',''),'[[:digit:]]{1,2}') TAPE,
-    REGEXP_SUBSTR(STUDYUNITCODE,\'[[:alpha:]]{1}\') SIDE
+    REGEXP_SUBSTR(STUDYUNITCODE,'[[:alpha:]]{1}') SIDE
 FROM TB_STUDYUNIT
 ORDER BY KWON,STUDYUNITCODE
@@ 줄 75: / 줄 75: @@
   - 페이지정보에서 첫페이지를 찾아서 알려준다. <code sql>
-SELECT SOURCE, REPLACE(REGEXP_SUBSTR(SOURCE,\'p[[:digit:]]{1,3}\'),\'p\',\'\') PAGE
+SELECT SOURCE, REPLACE(REGEXP_SUBSTR(SOURCE,'p[[:digit:]]{1,3}'),'p','') PAGE
 FROM QUESTION WHERE ROWNUM < 10;
 </code>
@@ 줄 96: / 줄 96: @@
 SELECT
      ADDRESS
-    ,REGEXP_SUBSTR(ADDRESS,\'[^ ]+\') AS SIDO
+    ,REGEXP_SUBSTR(ADDRESS,'[^ ]+') AS SIDO
-    ,REPLACE(REGEXP_SUBSTR(ADDRESS,\' +[^ ]+\'),\' \',\'\') as GUGUN
+    ,REPLACE(REGEXP_SUBSTR(ADDRESS,' +[^ ]+'),' ','') as GUGUN
-    ,REPLACE(ADDRESS,REGEXP_SUBSTR(ADDRESS,\'[^ ]+\')||REGEXP_SUBSTR(ADDRESS,\' +[^ ]+\')||\' \',\'\') AS etc
+    ,REPLACE(ADDRESS,REGEXP_SUBSTR(ADDRESS,'[^ ]+')||REGEXP_SUBSTR(ADDRESS,' +[^ ]+')||' ','') AS etc
-    ,REGEXP_SUBSTR(ADDRESS,\'[^ ]+(.)$\')
+    ,REGEXP_SUBSTR(ADDRESS,'[^ ]+(.)$')
 FROM DV_ADDRESS_TEMP ;
 </code>
@@ 줄 125: / 줄 125: @@
 --- - -----
 1 36126
+</code>
+  - 공백으로 나눈다 <code sql>
+with v_time as (
+    select '2016. 1. 29. 오후 11:00:53' as time from dual
+)
+select
+    time
+    ,REGEXP_SUBSTR(time,'[^ ]+',1,1,'i')
+    || REGEXP_SUBSTR(time,'[^ ]+',1,2,'i')
+    || REGEXP_SUBSTR(time,'[^ ]+',1,3,'i') AS ymd
+    ,TO_DATE(REGEXP_SUBSTR(time,'[^ ]+',1,1,'i')
+    || REGEXP_SUBSTR(time,'[^ ]+',1,2,'i')
+    || REGEXP_SUBSTR(time,'[^ ]+',1,3,'i'),'YYYY.fmMM.DD.') AS convert_time
+from v_time;
+</code>
+  - 결과값 <code>
+TIME                       YMD              CONVERT_TIME
+------------------------   ---------------  -------------------
+. 1. 29. 오후 11:00:53  2016.1.29.       2016-01-29 00:00:00
 </code>
@@ 줄 153: / 줄 173: @@
 from cust;
 </code>
+===== 첫단어 가져오기 =====
+  - 숫자/문자로만 이루어진 첫단어 <code sql>
+SELECT REGEXP_SUBSTR('first-team second-team third-team', '[[:alnum:]]*') FROM dual;
+</code> <code>first</code>
+  - 스페이스가 있기 전까지의 첫단어 <code sql>
+SELECT REGEXP_SUBSTR('first-team second-team third-team', '[^ ]+') FROM dual;
+</code><code>first-team</code>

dbms/oracle/devel/regexp/regexp_substr.1509408395.txt.gz · 마지막으로 수정됨: 2017/10/31 09:06 저자 starlits