使用Oracle SQL检索字符串中的某些字符串

Question

我正在使用Oracle SQL 11g R2尝试以下字符串搜索:

数据是:

| CN = aXYZApple-Au,OU =托管,OU =组,DC =核心,DC = dir,DC = abc,DC = com | CN = 31107427,OU =分发列表,OU =共享邮箱,DC =核心,DC = dir,DC = abc,DC = com | CN = ea90045052,OU = Groups,OU = eProfile,DC = core,DC = dir,DC = abc,DC = com | CN = S0901448,OU =分发列表,OU =共享邮箱,DC =核心,DC = dir,DC = abc,DC = com | CN = 00900887,OU =分发列表,OU =共享邮箱,DC =核心,DC = dir,DC = abc,DC = com | CN = NSMMMM,OU = LRP,OU =组,DC =核心,DC = dir,DC = abc,DC = com | CN = aXYZApple-Readonly,OU = Managed,OU = Groups,DC = core,DC = dir,DC = abc,DC = com | CN = WWSWW-Au,OU = LRP,OU =组,DC =核心,DC = dir,DC = abc,DC = com | CN = aLogical_RW,OU =托管,OU =组,DC =核心,DC = dir,DC = abc,DC = com | CN = aXYZApple-Write,OU = Managed,OU = Groups,DC = core,DC = dir,DC = abc,DC = com |

从上面的数据,我需要获取所有包含字符串"aXYZApple"的字符串,只有"OU = Managed"作为此字符串匹配的第二部分.

基于以上所述,以下结果就是我所追求的并且只会显示:

aXYZApple-Au
aXYZApple-Readonly
aXYZApple-Write

我正在使用Oracle regexp_like/regexp_replace.

Answer 1

您可以使用regexp_substr将输入数据拆分为行,然后查找相关的字符串,例如:

SQL> SELECT regexp_substr(line, 'aXYZApple[^,]*') subtxt
  2    FROM (SELECT regexp_substr(:x, '[^|]*\|', 1, rownum + 1) line
  3             FROM dual
  4           CONNECT BY LEVEL <= length(:x) - length(REPLACE(:x, '|', '')))
  5   WHERE regexp_substr(line || ',', '[^,]*,', 1, 2) = 'OU=Managed,'
  6     AND line LIKE '%aXYZApple%';

SUBTXT
--------------------------------------------------------------------------------
aXYZApple-Au
aXYZApple-Readonly
aXYZApple-Write

这是一个小解释.您必须逐步完成查询.

查询的内部部分将遍历您的数据(对于每个|):

SQL> SELECT regexp_substr(:x, '[^|]*\|', 1, rownum + 1) line
  2    FROM dual
  3  CONNECT BY LEVEL <= length(:x) - length(REPLACE(:x, '|', ''));

LINE
--------------------------------------------------------------------------------
 CN=aXYZApple-Au,OU=Managed,OU=Groups,DC=core,DC=dir,DC=abc,DC=com |
 CN=31107427,OU=Distribution Lists,OU=Shared Mailboxes,DC=core,DC=dir,DC=abc,DC=
 CN=ea90045052,OU=Groups,OU=eProfile,DC=core,DC=dir,DC=abc,DC=com |
 CN=S0901448,OU=Distribution Lists,OU=Shared Mailboxes,DC=core,DC=dir,DC=abc,DC=
 CN=00900887,OU=Distribution Lists,OU=Shared Mailboxes,DC=core,DC=dir,DC=abc,DC=
 CN=NSMMMM,OU=LRP,OU=Groups,DC=core,DC=dir,DC=abc,DC=com |
 CN=aXYZApple-Readonly,OU=Managed,OU=Groups,DC=core,DC=dir,DC=abc,DC=com |
 CN=WWSWW-Au,OU=LRP,OU=Groups,DC=core,DC=dir,DC=abc,DC=com |
 CN=aLogical_RW,OU=Managed,OU=Groups,DC=core,DC=dir,DC=abc,DC=com |
 CN=aXYZApple-Write,OU=Managed,OU=Groups,DC=core,DC=dir,DC=abc,DC=com |

然后,您将OU=Managed在第二个位置循环播放该字符串:

SQL> SELECT regexp_substr(line || ',', '[^,]*,', 1, 2) second_part
  2    FROM (SELECT regexp_substr(:x, '[^|]*\|', 1, rownum + 1) line
  3             FROM dual
  4           CONNECT BY LEVEL <= length(:x) - length(REPLACE(:x, '|', '')));

SECOND_PART
--------------------------------------------------------------------------------
OU=Managed,
OU=Distribution Lists,
OU=Groups,
OU=Distribution Lists,
OU=Distribution Lists,
OU=LRP,
OU=Managed,
OU=LRP,
OU=Managed,
OU=Managed,

最后,选择带有最后一个的相关部分regexp_substr.