Oracle：如何以最佳方式使用不同的 where 子句进行多次计数？

我需要对同一表中具有不同 where 子句的行进行计数。以下是我所需的输出

Bu   #A   #B  #C  #D #E #F #G  #H  #J  #K  #L   #M  #N
GB01 267  284 84  45 35 32 458 801 111 899 892  56  99
NL01 132  844 65  28 26 12 627 321 56  681 1062 127 128

每列都有自己的标准，到目前为止我有以下 SQL，但它看起来已经很丑陋并且没有完全返回我需要的内容

SELECT *  FROM (
  SELECT
    c_unit_code,
    COUNT(*) AS ADVICE_EXPORT,
    0 AS CONFIRMATION_EXPORT,
    0 AS ISSUANCE_STANDBY
  FROM EXIMTRX.EPLC_MASTER
  WHERE (CLS_FLG NOT LIKE 'YES' OR CLS_FLG IS NULL) AND (
    form_of_lc LIKE 'IRREVOCABLE' OR
    form_of_lc LIKE 'REVOCABLE' OR
    form_of_lc LIKE 'IRREVOCABLE TRANSFERABLE' OR
    form_of_lc LIKE 'REVOCABLE TRANSFERABLE') AND our_eng LIKE 'ADVICE'
    GROUP BY c_unit_code
UNION
  SELECT
    c_unit_code,
    0 AS ADVICE_EXPORT,
    COUNT(*) AS CONFIRMATION_EXPORT,
    0 AS ISSUANCE_STANDBY
  FROM EXIMTRX.EPLC_MASTER
  WHERE (CLS_FLG NOT LIKE 'YES' OR CLS_FLG IS NULL) AND (
    form_of_lc LIKE 'IRREVOCABLE' OR
    form_of_lc LIKE 'REVOCABLE' OR
    form_of_lc LIKE 'IRREVOCABLE TRANSFERABLE' OR
    form_of_lc LIKE 'REVOCABLE TRANSFERABLE') AND our_eng LIKE 'CONFIRMATION'
    GROUP BY c_unit_code
UNION
  SELECT 
    c_unit_code,
    0 AS ADVICE_EXPORT,
    0 AS CONFIRMATION_EXPORT,
    COUNT(*) AS ISSUANCE_STANDBY
  FROM EXIMTRX.EPLC_MASTER
  WHERE (CLS_FLG NOT LIKE 'YES' OR CLS_FLG IS NULL) AND (
    form_of_lc LIKE 'IRREVOCABLE STANDBY' OR
    form_of_lc LIKE 'REVOCABLE STANDBY' OR
    form_of_lc LIKE 'IRREVOC TRANS STANDBY')
    GROUP BY c_unit_code
);

这就是它返回的内容

GB01    0   0   17
GB01    0   39  0
GB01    80  0   0
NL01    0   0   32
NL01    0   159 0
NL01    341 0   0

有什么想法，我怎样才能实现我所需要的？

  SELECT
    c_unit_code,
    COUNT(case when YOUR_CONDITIONS_FOR_ADVICE_EXPORT then 1 end) AS ADVICE_EXPORT,
    COUNT(case when YOUR_CONDITIONS_FOR_CONFIRMATION_EXPORT then 1 end) AS CONFIRMATION_EXPORT,
    COUNT(case when YOUR_CONDITIONS_FOR_ISSUANCE_STANDBY then 1 end) AS ISSUANCE_STANDBY
  FROM EXIMTRX.EPLC_MASTER
  GROUP BY c_unit_code