extract data sql - sql

Question

Example: Below is the string(sentence) in field and I want to extract the specific data from the below patterns using select query in different fields:
i )
Input :
/a03/infor/current/server/infa_sh/ScriptFil/infa_common/adap_main 'FI_RE_PRJ' 'wf_RE_ACC_TIE_HIS_MNT_EN_AM'
Output :
Select query to fetch FI_RE_PRJ and wf_RE_ACC_TIE_HIS_MNT_EN_AM
Other pattern I have is :
Input :
$SCRIPTS/run_in.ksh -f FI_FLE_PRJ -wait wf_FI_SV_CNCL_RP_BAS_KF
Output :
Select query to fetch FI_FLE_PRJ and wf_FI_SV_CNCL_RP_BAS_KF from input

Answer 1

We can try using REGEXP_SUBSTR with a capture group:
SELECT
REGEXP_SUBSTR(col, '''(.*?)''', 1, 1, NULL, 1) AS first,
REGEXP_SUBSTR(col, '''(.*?)''', 1, 2, NULL, 1) AS second
FROM yourTable;

Answer 2

You can use simple string functions (which are much faster than regular expressions):
SELECT SUBSTR( value, pos1 + 1, pos2 - pos1 - 1 ) AS quote1,
SUBSTR( value, pos3 + 1, pos4 - pos3 - 1 ) AS quote2
FROM (
SELECT value,
INSTR(value, '''', 1, 1) AS pos1,
INSTR(value, '''', 1, 2) AS pos2,
INSTR(value, '''', 1, 3) AS pos3,
INSTR(value, '''', 1, 4) AS pos4
FROM table_name
)
Which, for the sample data:
CREATE TABLE table_name (value) AS
SELECT '/a03/infor/current/server/infa_sh/ScriptFil/infa_common/adap_main ''FI_RE_PRJ'' ''wf_RE_ACC_TIE_HIS_MNT_EN_AM''' FROM DUAL;
Outputs:
QUOTE1
QUOTE2
FI_RE_PRJ
wf_RE_ACC_TIE_HIS_MNT_EN_AM
fiddle