我有一个很长的 SQL 脚本。非常丑陋的是，我不得不多次复制和粘贴现有代码。我更愿意参考现有的代码。
我的目标是每个代码块只写一次。如果我需要第二次，我会参考它。没有意见这可能吗？
SELECT batch
FROM (SELECT 'DISCONNECT ent_user FROM job_code WITH user_id ="'
|| a.user_id
|| '" , jc_name = "'
|| b.jc_name
|| '";'
AS batch,
1 AS my_order
FROM ent_user a, user_jc b
WHERE a.user_id IN (SELECT user_id
FROM (SELECT REPLACE (overview.entity_key,
'user_id=',
'')
AS USER_ID,
details.old_value_str,
SUBSTR (
details.old_value_str,
1,
INSTR (details.old_value_str,
'-',
1,
1)
- 1)
AS OLD_PREFIX,
details.new_value_str,
SUBSTR (
details.new_value_str,
1,
INSTR (details.new_value_str,
'-',
1,
1)
- 1)
AS NEW_PREFIX,
overview.from_event_time,
CASE
WHEN SUBSTR (
details.old_value_str,
1,
INSTR (
details.old_value_str,
'-',
1,
1)
- 1) =
SUBSTR (
details.new_value_str,
1,
INSTR (
details.
new_value_str,
'-',
1,
1)
- 1)
THEN
'OK'
ELSE
'DELETE'
END
AS COMPARE
FROM audit_trail overview
INNER JOIN
audit_info details
ON overview.serial = details.serial
WHERE TO_CHAR (SYSDATE, 'IW-YYYY') =
TO_CHAR (
overview.from_event_time,
'IW-YYYY')
AND details.field_name =
'__99__Department'
AND overview.action = 'Update'
AND CASE
WHEN SUBSTR (
details.
old_value_str,
1,
INSTR (
details.
old_value_str,
'-',
1,
1)
- 1) =
SUBSTR (
details.
new_value_str,
1,
INSTR (
details.
new_value_str,
'-',
1,
1)
- 1)
THEN
'OK'
ELSE
'DELETE'
END = 'DELETE'
AND REPLACE (overview.entity_key,
'user_id=',
'') NOT LIKE
'EXT%'
AND details.old_value_str LIKE
'INT%'
AND details.new_value_str NOT LIKE
'INT%'))
AND a.user_id = b.user_id
UNION
SELECT 'DISCONNECT rss_user FROM user_group WITH rss_user_name = "'
|| b.rss_user_name
|| '" rss_name = "'
|| b.rss_name
|| '" rss_type = "'
|| b.rss_type
|| '" , ug_name = "'
|| b.ug_name
|| '";'
AS batch,
2 AS my_order
FROM ent_user a, ru_ug b
WHERE a.user_id IN (SELECT user_id
FROM (SELECT REPLACE (overview.entity_key,
'user_id=',
'')
AS USER_ID,
details.old_value_str,
SUBSTR (
details.old_value_str,
1,
INSTR (
details.old_value_str,
'-',
1,
1)
- 1)
AS OLD_PREFIX,
details.new_value_str,
SUBSTR (
details.new_value_str,
1,
INSTR (
details.new_value_str,
'-',
1,
1)
- 1)
AS NEW_PREFIX,
overview.from_event_time,
CASE
WHEN SUBSTR (
details.
old_value_str,
1,
INSTR (
details.
old_value_str,
'-',
1,
1)
- 1) =
SUBSTR (
details.
new_value_str,
1,
INSTR (
details.
new_value_str,
'-',
1,
1)
- 1)
THEN
'OK'
ELSE
'DELETE'
END
AS COMPARE
FROM audit_trail overview
INNER JOIN
audit_info details
ON overview.serial =
details.serial
WHERE TO_CHAR (SYSDATE, 'IW-YYYY') =
TO_CHAR (
overview.from_event_time,
'IW-YYYY')
AND details.field_name =
'__99__Department'
AND overview.action = 'Update'
AND CASE
WHEN SUBSTR (
details.
old_value_str,
1,
INSTR (
details.
old_value_str,
'-',
1,
1)
- 1) =
SUBSTR (
details.
new_value_str,
1,
INSTR (
details.
new_value_str,
'-',
1,
1)
- 1)
THEN
'OK'
ELSE
'DELETE'
END = 'DELETE'
AND REPLACE (
overview.entity_key,
'user_id=',
'') NOT LIKE
'EXT%'
AND details.old_value_str LIKE
'INT%'
AND details.new_value_str NOT LIKE
'INT%'))
AND a.user_id = b.user_id
AND ( b.rss_type = 'TEST14'
OR b.rss_type = 'TTTR'
OR b.rss_type = 'OFFI2021'
OR b.rss_type = 'TEST27'
OR b.rss_type = 'TEST22'
OR b.rss_type = 'TEST26'
OR b.rss_type = 'TEST23'
OR b.rss_type = 'TEST39'
OR b.rss_type = 'TEST19'
OR b.rss_type = 'TEST12'
OR b.rss_type = 'TEST16'
OR b.rss_type = 'TEST05'
OR b.rss_type = 'TEST09'
OR b.rss_type = 'HSSO'
OR b.rss_type = 'TEST37'
OR b.rss_type = 'TEST34'
OR b.rss_type = 'TEST1')
UNION
SELECT 'DELETE rss_user WITH rss_user_name = "'
|| b.rss_user_name
|| '" rss_name = "'
|| b.rss_name
|| '" rss_type = "'
|| b.rss_type
|| '";'
AS batch,
3 AS my_order
FROM ent_user a, rss_user b
WHERE a.user_id IN (SELECT user_id
FROM (SELECT REPLACE (overview.entity_key,
'user_id=',
'')
AS USER_ID,
details.old_value_str,
SUBSTR (
details.old_value_str,
1,
INSTR (
details.old_value_str,
'-',
1,
1)
- 1)
AS OLD_PREFIX,
details.new_value_str,
SUBSTR (
details.new_value_str,
1,
INSTR (
details.new_value_str,
'-',
1,
1)
- 1)
AS NEW_PREFIX,
overview.from_event_time,
CASE
WHEN SUBSTR (
details.
old_value_str,
1,
INSTR (
details.
old_value_str,
'-',
1,
1)
- 1) =
SUBSTR (
details.
new_value_str,
1,
INSTR (
details.
new_value_str,
'-',
1,
1)
- 1)
THEN
'OK'
ELSE
'DELETE'
END
AS COMPARE
FROM audit_trail overview
INNER JOIN
audit_info details
ON overview.serial =
details.serial
WHERE TO_CHAR (SYSDATE, 'IW-YYYY') =
TO_CHAR (
overview.from_event_time,
'IW-YYYY')
AND details.field_name =
'__99__Department'
AND overview.action = 'Update'
AND CASE
WHEN SUBSTR (
details.
old_value_str,
1,
INSTR (
details.
old_value_str,
'-',
1,
1)
- 1) =
SUBSTR (
details.
new_value_str,
1,
INSTR (
details.
new_value_str,
'-',
1,
1)
- 1)
THEN
'OK'
ELSE
'DELETE'
END = 'DELETE'
AND REPLACE (
overview.entity_key,
'user_id=',
'') NOT LIKE
'EXT%'
AND details.old_value_str LIKE
'INT%'
AND details.new_value_str NOT LIKE
'INT%'))
AND a.user_id = b.user_id
AND ( b.rss_type = 'TEST14'
OR b.rss_type = 'TEST27'
OR b.rss_type = 'TEST22'
OR b.rss_type = 'TEST26'
OR b.rss_type = 'TEST23'
OR b.rss_type = 'TEST39'
OR b.rss_type = 'TEST19'
OR b.rss_type = 'TEST12'
OR b.rss_type = 'TEST16'
OR b.rss_type = 'TEST09'
OR b.rss_type = 'TEST05'
OR b.rss_type = 'TEST37'
OR b.rss_type = 'TEST34'
OR b.rss_type = 'TEST1')
ORDER BY my_order;
您可以在没有重复代码的情况下重写查询吗？