Database oracle数据库:按字符拆分字符串
作为Oracle数据库的新手,我恳请您的帮助 我需要将字符串拆分为不同的记录,每个字符对应一条记录: 我有一个查询,其中包含一个VARCHAR字段,我需要将其拆分为几个字符Database oracle数据库:按字符拆分字符串,database,string,oracle,split,Database,String,Oracle,Split,作为Oracle数据库的新手,我恳请您的帮助 我需要将字符串拆分为不同的记录,每个字符对应一条记录: 我有一个查询,其中包含一个VARCHAR字段,我需要将其拆分为几个字符 select MAPS.MAP_ID, HARD_BIN_LINES.LINE, HARD_BIN_LINES.BINS from MAPS, HARD_BIN_LINES where MAPS.MAP_ID = 9595435 and MAPS.MAP_ID = HARD_BIN_LINES.MAP_ID
select
MAPS.MAP_ID,
HARD_BIN_LINES.LINE, HARD_BIN_LINES.BINS
from MAPS, HARD_BIN_LINES
where MAPS.MAP_ID = 9595435 and MAPS.MAP_ID = HARD_BIN_LINES.MAP_ID
order by HARD_BIN_LINES.MAP_ID, HARD_BIN_LINES.LINE
MAP_ID LINE BINS
9595435 1 ÿÿÿÿÿÿÿÿÿÿÿþþþþÿÿÿÿÿÿÿÿÿÿÿ
9595435 2 ÿÿÿÿÿÿÿþþ þþÿÿÿÿÿÿÿÿ
9595435 3 ÿÿÿÿÿþþ2 þÿÿÿÿÿÿ
9595435 4 ÿÿÿÿþ þþÿÿÿÿ
9595435 5 ÿÿÿþ2 þÿÿÿ
9595435 6 ÿÿþ þÿÿ
9595435 7 ÿÿþ2 þÿÿ
9595435 8 ÿþþÿ þþÿ
9595435 9 ÿ2 þÿ
9595435 10 þÿ þÿ
9595435 11 þ þ
9595435 12 ü þ
9595435 13 ü2 þ
9595435 14 þ þ
9595435 15 þ ÿ
9595435 16 ÿþ xx þÿ
9595435 17 ÿþ þÿ
9595435 18 ÿÿþ þÿÿ
9595435 19 ÿÿþ þÿÿ
9595435 20 ÿÿÿþ þÿÿÿ
9595435 21 ÿÿÿÿþ þþÿÿÿÿ
9595435 22 ÿÿÿÿÿþ þ 2 þÿÿÿÿÿÿ
9595435 23 ÿÿÿÿÿÿÿþ þ þþ ÿÿÿÿÿÿÿÿ
9595435 24 ÿÿÿÿÿÿÿÿÿÿÿþþþþÿÿÿÿÿÿÿÿÿÿÿ
我的目标是将BINS记录拆分为几个字母,以获得这样的记录集
MAP_ID LINE LEVEL CHR BINCODE
-------+-------+-------+---+--------
9595435 1 2 ÿ 255
9595435 1 3 ÿ 255
9595435 1 4 ÿ 255
9595435 1 5 ÿ 255
9595435 1 6 ÿ 255
9595435 1 7 ÿ 255
9595435 1 8 ÿ 255
9595435 1 9 ÿ 255
9595435 1 10 ÿ 255
9595435 1 11 ÿ 255
9595435 1 12 þ 254
9595435 1 13 þ 254
9595435 1 14 þ 254
9595435 1 15 þ 254
9595435 1 16 ÿ 255
9595435 1 17 ÿ 255
9595435 1 18 ÿ 255
9595435 1 19 ÿ 255
9595435 1 20 ÿ 255
9595435 1 21 ÿ 255
9595435 1 22 ÿ 255
9595435 1 23 ÿ 255
9595435 1 24 ÿ 255
9595435 1 25 ÿ 255
9595435 1 26 ÿ 255
-------+-------+-------+---+--------
9595435 2 2 ÿ 255
9595435 2 3 ÿ 255
9595435 2 4 ÿ 255
9595435 2 5 ÿ 255
9595435 2 6 ÿ 255
9595435 2 7 ÿ 255
9595435 2 8 þ 254
9595435 2 9 þ 254
9595435 2 10 1
9595435 2 11 1
9595435 2 12 10
9595435 2 13 1
9595435 2 14 13
9595435 2 15 17
9595435 2 16 1
9595435 2 17 þ 254
9595435 2 18 þ 254
9595435 2 19 ÿ 255
9595435 2 20 ÿ 255
9595435 2 21 ÿ 255
9595435 2 22 ÿ 255
9595435 2 23 ÿ 255
9595435 2 24 ÿ 255
9595435 2 25 ÿ 255
9595435 2 26 ÿ 25
-------+-------+-------+---+--------
(...)
如果我试图解决使用CONNECT BY语句的问题,我会获得许多重复记录,我无法理解为什么我的查询中也出现了问题:
with temp as (
select
MAPS.MAP_ID,
HARD_BIN_LINES.LINE, HARD_BIN_LINES.BINS
from MAPS, HARD_BIN_LINES
where MAPS.MAP_ID = 9595435 and MAPS.MAP_ID = HARD_BIN_LINES.MAP_ID
order by HARD_BIN_LINES.MAP_ID, HARD_BIN_LINES.LINE
)
select
MAP_ID, LINE, LEVEL,
substr(BINS,level,1) as CHR, ASCII(substr(BINS,level,1)) as BINCODE
from temp
connect by level <= length(BINS)
您可以尝试以下方法:
select level, substr('Stefano', level, 1) /* a substring starting from level-th character, 1 character log */
from dual
connect by level <= length('Stefano') /* the same number of rows than the length of the string */
这将为起始字符串的每个字符生成一行,其中第n行包含由substr提取的第n个字符。您可以尝试以下方法:
select level, substr('Stefano', level, 1) /* a substring starting from level-th character, 1 character log */
from dual
connect by level <= length('Stefano') /* the same number of rows than the length of the string */
这将为起始字符串的每个字符生成一行,其中第n行包含由substr提取的第n个字符