这是基于我的另一个问题。。请参见在oracle中更新表集合列等于选择id在查询外部匹配的位置
是否可以使用循环或光标来更新我的表snp\u faculty\u census，其中person\u skey值在snp\u faculty\u census和vpaa\u ppaggenl\u fis中匹配？
我之所以问这个问题，是因为我有一个update语句，当我显式定义id列（person_skey）时，它工作得非常好，例如：

WHERE V.PERSON_SKEY = 12345

但是，如果我使用从另一个表中获取值的where子句

WHERE V.PERSON_SKEY = SNP_FACULTY_CENSUS.PERSON_SKEY

update语句没有正确地更新列（我认为它对max（oir\u degree\u hierarchy）使用了错误的值）
以下是我的代码，我希望在这里循环使用snp\u faculty\u census中不同的person\u skey值：

WITH HIGHES_DEG_VALUE AS (
    SELECT max(D.OIR_DEGREE_HIERARCHY) AS MAX_DEG
    FROM VPAA_PPAGGENL_FIS  V
    JOIN DIM_DEGREE_CROSSWALK D
        ON V.VPAA_FACULTY_DEGREE_CODE =
           D.VPAA_DEGREE_CODE       
    WHERE V.PERSON_SKEY = 189444) --CHANGE TO  = SRC.PERSON_SKEY
SELECT 
CASE 
    WHEN MAX_DEG = 30 
        THEN  --CHECK IF EXIST ON CROSSWALKS AND USE THAT VALUE IF IT DOES
        (CASE
            WHEN EXISTS (SELECT V.VPAA_FACULTY_DEGREE_CODE, --IF ON SUBJ CODE CROSSWALK
                         V.VPAA_FACULTY_SUBJECT_CODE
                         FROM VPAA_PPAGGENL_FIS V
                         JOIN DIM_DEGREE_CROSSWALK D
                         ON V.VPAA_FACULTY_DEGREE_CODE = D.VPAA_DEGREE_CODE 
                         INNER JOIN  SUBJ_CODE_CROSSWALK  S
                         ON V.VPAA_FACULTY_DEGREE_CODE = S.VPAA_FACULTY_DEGREE_CODE
                            and S.VPAA_FACULTY_SUBJECT_CODE = V.VPAA_FACULTY_SUBJECT_CODE 
                            WHERE V.PERSON_SKEY =189444 ----CHANGE TO  = SRC.PERSON_SKEY
                         )
                THEN (SELECT DISTINCT  -- USE TERMINAL VALUE FROM SUBJ CODE
                       CASE
                             WHEN s.OIR_TERMINAL_DEGREE_STATUS =
                                  'Terminal'
                             THEN
                                 'Yes'
                             WHEN s.OIR_TERMINAL_DEGREE_STATUS =
                                  'Not terminal'
                             THEN
                                 'No'
                             ELSE
                                 'Unknown'
                        END
                      FROM SUBJ_CODE_CROSSWALK  S
                                   INNER JOIN VPAA_PPAGGENL_FIS V
                                       ON V.VPAA_FACULTY_DEGREE_CODE =
                                          S.VPAA_FACULTY_DEGREE_CODE
                                    AND S.VPAA_FACULTY_SUBJECT_CODE =
                                          V.VPAA_FACULTY_SUBJECT_CODE
                                    WHERE  V.PERSON_SKEY = 189444 )----CHANGE TO  = SRC.PERSON_SKEY )                        

            WHEN EXISTS (SELECT DISTINCT V.VPAA_FACULTY_DEGREE_CODE, --IF ON CLIC INSTRUCTORS CROSSWALK
                                V.VPAA_FACULTY_SUBJECT_CODE,
                                I.OIR_EMPLOYEE_DEPARTMENT_HOME_ORG
                         FROM VPAA_PPAGGENL_FIS V
                         INNER JOIN CLIC_INSTRUCTORS_CROSSWALK C
                         ON V.VPAA_FACULTY_DEGREE_CODE = C.VPAA_FACULTY_DEGREE_CODE 
                         AND V.VPAA_FACULTY_SUBJECT_CODE = C.VPAA_FACULTY_SUBJECT_CODE
                         INNER JOIN IPEDS_REPORT_DETAILS I ON V.PIDM = I.HR_PIDM
                         WHERE V.PERSON_SKEY = 189444 ----CHANGE TO  = SRC.PERSON_SKEY
                         AND  (I.OIR_EMPLOYEE_DEPARTMENT_HOME_ORG = '396000'
                              OR I.OIR_EMPLOYEE_DEPARTMENT_HOME_ORG = '396010')
                         ) 
                THEN (SELECT DISTINCT 
                        CASE
                             WHEN C.OIR_TERMINAL_DEGREE_STATUS =
                                  'Terminal'
                             THEN
                                 'Yes'
                             WHEN C.OIR_TERMINAL_DEGREE_STATUS =
                                  'Not terminal'
                             THEN
                                 'No'
                             ELSE
                                 'Unknown'
                        END  
                       FROM CLIC_INSTRUCTORS_CROSSWALK C
                       INNER JOIN VPAA_PPAGGENL_FIS V
                           ON C.VPAA_FACULTY_DEGREE_CODE =
                              V.VPAA_FACULTY_DEGREE_CODE
                        AND C.VPAA_FACULTY_SUBJECT_CODE =
                              V.VPAA_FACULTY_SUBJECT_CODE
                        WHERE V.PERSON_SKEY = 189444 )----CHANGE TO  = SRC.PERSON_SKEY)
       ELSE --USE DIM DEGREE CROSSWALK NORMALLY
            (SELECT DISTINCT 
                        CASE
                             WHEN D.OIR_TERMINAL_DEGREE_STATUS =
                                  'Terminal'
                             THEN
                                 'Yes'
                             WHEN D.OIR_TERMINAL_DEGREE_STATUS =
                                  'Not terminal'
                             THEN
                                 'No'
                             ELSE
                                 'Unknown'
                        END  
            FROM DIM_DEGREE_CROSSWALK D
                 JOIN VPAA_PPAGGENL_FIS V
                     ON V.VPAA_FACULTY_DEGREE_CODE =
                        D.VPAA_DEGREE_CODE
               WHERE V.PERSON_SKEY = 189444 ----CHANGE TO  = SRC.PERSON_SKEY)
               ORDER BY OIR_DEGREE_HIERARCHY DESC
               FETCH FIRST ROW ONLY )
        END) --USE DIM DEGREE CROSSWALK FOR THE TERMINAL VALUE FOR THE MAX DEG THERE

    WHEN MAX_DEG != 30
    THEN
        (SELECT DISTINCT 
                        CASE
                             WHEN D.OIR_TERMINAL_DEGREE_STATUS =
                                  'Terminal'
                             THEN
                                 'Yes'
                             WHEN D.OIR_TERMINAL_DEGREE_STATUS =
                                  'Not terminal'
                             THEN
                                 'No'
                             ELSE
                                 'Unknown'
                        END  
            FROM DIM_DEGREE_CROSSWALK D
             JOIN VPAA_PPAGGENL_FIS V
                 ON V.VPAA_FACULTY_DEGREE_CODE =
                    D.VPAA_DEGREE_CODE
           WHERE V.PERSON_SKEY = 189444 ----CHANGE TO  = SRC.PERSON_SKEY)
           ORDER BY OIR_DEGREE_HIERARCHY DESC
           FETCH FIRST ROW ONLY )
    ELSE NULL
END 
FROM HIGHES_DEG_VALUE