子查询添加到 PL/SQL 中的现有查询
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【中文标题】子查询添加到 PL/SQL 中的现有查询【英文标题】：SubQuery added to existing Query in PL/SQL 【发布时间】：2010-12-02 21:42:35 【问题描述】：我确信这很简单，我在格式化方面遗漏了一些东西，但我想添加以下查询：
SELECT s.stud_id,
jb.REGION,
jt.DISTRICT
FROM pa_student s,
(SELECT su.stud_id,
rf.user_desc REGION
FROM pa_stud_user su,
pa_usrrf_stud rf
WHERE su.col_num = rf.col_num
AND su.user_value = rf.user_id
AND su.col_num = 300) JB,
(SELECT su.stud_id,
rf.user_desc DISTRICT
FROM pa_stud_user su,
pa_usrrf_stud rf
WHERE su.col_num = rf.col_num
AND su.user_value = rf.user_id
AND su.col_num = 400) JT
WHERE s.stud_id = jb.stud_id (+)
AND s.stud_id = jt.stud_id (+)
到现有的查询（这两个都可以自己正常工作）
SELECT sqc.CPNT_TYP_ID AS cpntTypeID ,
sqc.CPNT_ID AS cpntID ,
sqc.REV_DTE AS revDate,
sqc.COMPL_DTE AS complDate,
sqc.CMPL_STAT_ID AS cmplStatID,
sqc.REQ_DTE AS reqDate,
cpt.CPNT_TITLE AS cpntTtile,
cpt.RTYP_ID ,
cpt.DMN_ID ,
cpt.DEL_MTH_ID ,
cpt.CPNT_SRC_ID ,
cpt.NOTACTIVE ,
cpt.SAFETY_REL ,
cpt.CREATE_DTE,
cpt.REV_NUM AS cpntRevNum,
cpt.REVISER ,
cpt.APPRVR ,
cpt.APPRVD ,
cpt.APPRVL_DTE ,
cpt.MIN_ENRL ,
cpt.MAX_ENRL ,
cpt.CPNT_LEN ,
cpt.PREP_LEN ,
cpt.LES_PLAN ,
cpt.CONTACT ,
cpt.CREDIT_HRS,
cpt.CPE_HRS ,
cpt.CONTACT_HRS ,
cpt.STUD_MATS ,
cpt.INST_MATS ,
cpt.CPNT_DESC ,
cpt.TGT_AUDNC ,
cpt.COMMENTS ,
cpt.GRADE_OPT ,
cpt.ENRL_THRESHOLD_DAYS ,
cpt.SHIPPING_REQUIRED,
cpt.AUTO_FILL_ENRL ,
cpt.WAITLIST_REMDR_SENT,
cpt.AUTO_COMPETENCY ,
cpt.CPNT_CLASSIFICATION ,
cpt.CHGBCK_METHOD ,
cpt.CATALOG_SKU ,
cpt.SCHEDULE_CAN_OVERRIDE_PRICE ,
cpt.PRODUCTION_READY,
cpt.CPNT_GOALS ,
cpt.SELF_RECORD_LRNGEVT ,
cpt.SUB_RECORD_LRNGEVT ,
cpt.TAP_DEF_ID ,
cpt.APPROVAL_REQD ,
cpt.INIT_PERIOD_TYPE_ID ,
cpt.INIT_NUMBER ,
cpt.INIT_BASIS_TYPE_ID,
cpt.RETRNG_PERIOD_TYPE_ID ,
cpt.RETRNG_NUMBER ,
cpt.RETRNG_BASIS_TYPE_ID ,
cpt.RATING ,
cpt.SELF_ENRL ,
cpt.USER_REQ_ENABLED ,
cpt.USER_CAN_WAITLIST ,
cpt.CPNT_KEY,
cpt.REGISTER_ONLINE ,
cpt.ESIG_ENABLED ,
cs.CMPL_STAT_DESC AS cmplStatDesc,
s.stud_id,
s.fname,
s.lname,
s.mi,
s.STUD_ID AS studID,
s.LNAME AS lastName,
s.FNAME AS firstName,
s.MI AS middleName,
s.EMP_STAT_ID ,
s.EMP_TYP_ID,
s.JL_ID ,
s.JP_ID ,
s.TARGET_JP_ID ,
s.JOB_TITLE ,
s.DMN_ID ,
s.ORG_ID,
s.REGION_ID,
s.CO_ID ,
DECODE(s.NOTACTIVE, 'Y','N','N','Y') AS studActive ,
s.ADDR ,
s.CITY ,
s.STATE ,
s.POSTAL ,
s.CNTRY ,
s.SUPER ,
s.COACH_STUD_ID ,
s.HIRE_DTE,
s.TERM_DTE ,
s.EMAIL_ADDR,
s.RESUME_LOCN ,
s.COMMENTS ,
s.SHIPPING_NAME ,
s.SHIPPING_CONTACT_NAME,
s.SHIPPING_ADDR ,
s.SHIPPING_ADDR1 ,
s.SHIPPING_CITY ,
s.SHIPPING_STATE,
s.SHIPPING_POSTAL ,
s.SHIPPING_CNTRY ,
s.SHIPPING_PHON_NUM ,
s.SHIPPING_FAX_NUM ,
s.SHIPPING_EMAIL_ADDR ,
s.STUD_PSWD ,
s.PIN ,
s.PIN_DATE,
s.ENCRYPTED ,
s.HAS_ACCESS ,
s.BILLING_NAME ,
s.BILLING_CONTACT_NAME ,
s.BILLING_ADDR ,
s.BILLING_ADDR1 ,
s.BILLING_CITY ,
s.BILLING_STATE ,
s.BILLING_POSTAL,
s.BILLING_CNTRY ,
s.BILLING_PHON_NUM ,
s.BILLING_FAX_NUM ,
s.BILLING_EMAIL_ADDR ,
s.SELF_REGISTRATION ,
s.SELF_REGISTRATION_DATE,
s.ACCESS_TO_ORG_FIN_ACT ,
s.NOTIFY_DEV_PLAN_ITEM_ADD ,
s.NOTIFY_DEV_PLAN_ITEM_MOD ,
s.NOTIFY_DEV_PLAN_ITEM_REMOVE ,
s.NOTIFY_WHEN_SUB_ITEM_COMPLETE ,
s.NOTIFY_WHEN_SUB_ITEM_FAILURE ,
s.LOCKED ,
s.PASSWORD_EXP_DATE,
s.SECURITY_QUESTION ,
s.SECURITY_ANSWER ,
s.ROLE_ID ,
s.IMAGE_ID ,
s.GENDER ,
s.PAST_SERVICE,
s.LST_UNLOCK_TSTMP,
s.MANAGE_SUB_SP,
s.MANAGE_OWN_SP,
NVL(userPref.preferred_timezone,pkg_state.get_default_timezone) AS preferred_timezone,
sq.qual_id AS qualID,
sq.assgn_dte AS assignDate,
sq.qual_id_root AS qualIDRoot,
q.qual_title AS qualTitle,
q.DMN_ID AS qualDomain,
q.QUAL_TYP_ID AS qualTypeID ,
q.NOTACTIVE AS qualNotActive ,
q.CREATE_DTE AS qualCreateDate,
q.QUAL_DESC AS qualDesc,
q.FORCE_INCOMPLETE AS qualForceIncomplete,
q.BASIS_DATE AS qualBasisDate,
q.ESIG_ENABLED AS qualEsigEnabled,
pkg_student.get_stud_qual_status (sq.stud_id, sq.qual_id, sq.qual_id_root) AS complete
FROM PA_STUD_QUAL_CPNT sqc,
PA_CPNT cpt,
PA_CMPL_STAT cs,
pa_student s,
pa_user_preference userPref,
pa_qual q,
(SELECT sq.stud_id,
sq.qual_id,
sq.assgn_dte,
sq.qual_id_root,
row_number() over (partition BY sq.stud_id,sq.qual_id order by sq.assgn_dte) rnum
FROM
(SELECT sq.stud_id,
sq.qual_id,
sq.assgn_dte,
sq.qual_id_root
FROM pa_stud_qual_relation sq,
( SELECT sq.stud_id FROM pa_stud_qual sq WHERE 1=1
/** and sq.stud_id in [UserSearch] */
/** and sq.qual_id in [CurriculumSearch] */
UNION
SELECT sq.stud_id
FROM pa_stud_qual_relation sq
WHERE 1=1
/** and sq.stud_id in [UserSearch] */
/** and sq.qual_id in [CurriculumSearch] */
) students
WHERE sq.stud_id = students.stud_id
/** and sq.qual_id in [CurriculumSearch]*/
UNION ALL
SELECT sq.stud_id,
sq.qual_id,
sq.assgn_dte,
sq.qual_id_root
FROM pa_stud_qual_relation sq,
pa_qual_relation qr,
( SELECT sq.stud_id FROM pa_stud_qual sq WHERE 1=1
/** and sq.stud_id in [UserSearch] */
/** and sq.qual_id in [CurriculumSearch] */
UNION
SELECT sq.stud_id
FROM pa_stud_qual_relation sq
WHERE 1=1
/** and sq.stud_id in [UserSearch] */
/** and sq.qual_id in [CurriculumSearch] */
) students
WHERE sq.stud_id = students.stud_id
AND qr.qual_id_child = sq.qual_id
/** and qr.qual_id_parent in [CurriculumSearch]*/
) sq
) sq
WHERE sqc.STUD_ID (+) = sq.stud_id
AND sqc.QUAL_ID (+) = sq.qual_id
AND sqc.QUAL_ID_ROOT(+) = sq.qual_id_root
AND sqc.CPNT_TYP_ID = cpt.CPNT_TYP_ID (+)
AND sqc.CPNT_ID = cpt.CPNT_ID (+)
AND sqc.REV_DTE = cpt.REV_DTE (+)
AND sqc.CMPL_STAT_ID = cs.CMPL_STAT_ID (+)
AND s.stud_id = sq.stud_id
AND s.stud_id = userPref.user_id(+)
AND userPref.user_type(+) = 'S'
AND sq.rnum = 1
AND sq.qual_id = q.qual_id
/** and [security:pa_student s]*/
我尝试了很多不同的格式，以至于超出了我对 SQL 的知识范围，我感到困惑......有什么想法吗？提前致谢。
【问题讨论】：
亲爱的上帝。请有人对此进行编码。 @Sathya：我回答了你的祈祷。不确定它有多大帮助。 :-) @Joe 谢谢！比原始状态更好！ 不太清楚你的问题是什么...... 你为什么用“psql”标记它？ psql 是 PostgreSQL 的命令行 shell，但您使用的是 Oracle 的 DECODE() 函数... 【参考方案1】：我结合了它。非常痛苦。请试试这个查询，祝你好运：
SELECT sqc.CPNT_TYP_ID AS cpntTypeID,
sqc.CPNT_ID AS cpntID,
sqc.REV_DTE AS revDate,
sqc.COMPL_DTE AS complDate,
sqc.CMPL_STAT_ID AS cmplStatID,
sqc.REQ_DTE AS reqDate,
cpt.CPNT_TITLE AS cpntTtile,
cpt.RTYP_ID,
cpt.DMN_ID,
cpt.DEL_MTH_ID,
cpt.CPNT_SRC_ID,
cpt.NOTACTIVE,
cpt.SAFETY_REL,
cpt.CREATE_DTE,
cpt.REV_NUM AS cpntRevNum,
cpt.REVISER,
cpt.APPRVR,
cpt.APPRVD,
cpt.APPRVL_DTE,
cpt.MIN_ENRL,
cpt.MAX_ENRL,
cpt.CPNT_LEN,
cpt.PREP_LEN,
cpt.LES_PLAN,
cpt.CONTACT,
cpt.CREDIT_HRS,
cpt.CPE_HRS,
cpt.CONTACT_HRS,
cpt.STUD_MATS,
cpt.INST_MATS,
cpt.CPNT_DESC,
cpt.TGT_AUDNC,
cpt.COMMENTS,
cpt.GRADE_OPT,
cpt.ENRL_THRESHOLD_DAYS,
cpt.SHIPPING_REQUIRED,
cpt.AUTO_FILL_ENRL,
cpt.WAITLIST_REMDR_SENT,
cpt.AUTO_COMPETENCY,
cpt.CPNT_CLASSIFICATION,
cpt.CHGBCK_METHOD,
cpt.CATALOG_SKU,
cpt.SCHEDULE_CAN_OVERRIDE_PRICE,
cpt.PRODUCTION_READY,
cpt.CPNT_GOALS,
cpt.SELF_RECORD_LRNGEVT,
cpt.SUB_RECORD_LRNGEVT,
cpt.TAP_DEF_ID,
cpt.APPROVAL_REQD,
cpt.INIT_PERIOD_TYPE_ID,
cpt.INIT_NUMBER,
cpt.INIT_BASIS_TYPE_ID,
cpt.RETRNG_PERIOD_TYPE_ID,
cpt.RETRNG_NUMBER,
cpt.RETRNG_BASIS_TYPE_ID,
cpt.RATING,
cpt.SELF_ENRL,
cpt.USER_REQ_ENABLED,
cpt.USER_CAN_WAITLIST,
cpt.CPNT_KEY,
cpt.REGISTER_ONLINE,
cpt.ESIG_ENABLED,
cs.CMPL_STAT_DESC AS cmplStatDesc,
s.stud_id,
s.fname,
s.lname,
s.mi,
s.STUD_ID AS studID,
s.LNAME AS lastName,
s.FNAME AS firstName,
s.MI AS middleName,
s.EMP_STAT_ID,
s.EMP_TYP_ID,
s.JL_ID,
s.JP_ID,
s.TARGET_JP_ID,
s.JOB_TITLE,
s.DMN_ID,
s.ORG_ID,
s.REGION_ID,
s.CO_ID,
DECODE(s.NOTACTIVE, 'Y','N','N','Y') AS studActive,
s.ADDR,
s.CITY,
s.STATE,
s.POSTAL,
s.CNTRY,
s.SUPER,
s.COACH_STUD_ID,
s.HIRE_DTE,
s.TERM_DTE,
s.EMAIL_ADDR,
s.RESUME_LOCN,
s.COMMENTS,
s.SHIPPING_NAME,
s.SHIPPING_CONTACT_NAME,
s.SHIPPING_ADDR,
s.SHIPPING_ADDR1,
s.SHIPPING_CITY,
s.SHIPPING_STATE,
s.SHIPPING_POSTAL,
s.SHIPPING_CNTRY,
s.SHIPPING_PHON_NUM,
s.SHIPPING_FAX_NUM,
s.SHIPPING_EMAIL_ADDR,
s.STUD_PSWD,
s.PIN,
s.PIN_DATE,
s.ENCRYPTED,
s.HAS_ACCESS,
s.BILLING_NAME,
s.BILLING_CONTACT_NAME,
s.BILLING_ADDR,
s.BILLING_ADDR1,
s.BILLING_CITY,
s.BILLING_STATE,
s.BILLING_POSTAL,
s.BILLING_CNTRY,
s.BILLING_PHON_NUM,
s.BILLING_FAX_NUM,
s.BILLING_EMAIL_ADDR,
s.SELF_REGISTRATION,
s.SELF_REGISTRATION_DATE,
s.ACCESS_TO_ORG_FIN_ACT,
s.NOTIFY_DEV_PLAN_ITEM_ADD,
s.NOTIFY_DEV_PLAN_ITEM_MOD,
s.NOTIFY_DEV_PLAN_ITEM_REMOVE,
s.NOTIFY_WHEN_SUB_ITEM_COMPLETE,
s.NOTIFY_WHEN_SUB_ITEM_FAILURE,
s.LOCKED,
s.PASSWORD_EXP_DATE,
s.SECURITY_QUESTION,
s.SECURITY_ANSWER,
s.ROLE_ID,
s.IMAGE_ID,
s.GENDER,
s.PAST_SERVICE,
s.LST_UNLOCK_TSTMP,
s.MANAGE_SUB_SP,
s.MANAGE_OWN_SP,
NVL(userPref.preferred_timezone,pkg_state.get_default_timezone) AS preferred_timezone,
sq.qual_id AS qualID,
sq.assgn_dte AS assignDate,
sq.qual_id_root AS qualIDRoot,
q.qual_title AS qualTitle,
q.DMN_ID AS qualDomain,
q.QUAL_TYP_ID AS qualTypeID,
q.NOTACTIVE AS qualNotActive,
q.CREATE_DTE AS qualCreateDate,
q.QUAL_DESC AS qualDesc,
q.FORCE_INCOMPLETE AS qualForceIncomplete,
q.BASIS_DATE AS qualBasisDate,
q.ESIG_ENABLED AS qualEsigEnabled,
pkg_student.get_stud_qual_status (sq.stud_id, sq.qual_id, sq.qual_id_root) AS complete,
/**-- Added from smaller query */
jb.REGION,
jt.DISTRICT
/**-- Added from smaller query */
FROM PA_STUD_QUAL_CPNT sqc,
PA_CPNT cpt,
PA_CMPL_STAT cs,
pa_student s,
pa_user_preference userPref,
pa_qual q,
(
SELECT sq.stud_id, sq.qual_id, sq.assgn_dte, sq.qual_id_root, row_number() over (partition BY sq.stud_id,sq.qual_id order by sq.assgn_dte) rnum
FROM
(
SELECT sq.stud_id, sq.qual_id, sq.assgn_dte, sq.qual_id_root
FROM pa_stud_qual_relation sq,
(
SELECT sq.stud_id FROM pa_stud_qual sq WHERE 1=1
/** and sq.stud_id in [UserSearch] */
/** and sq.qual_id in [CurriculumSearch] */
UNION
SELECT sq.stud_id FROM pa_stud_qual_relation sq WHERE 1=1
/** and sq.stud_id in [UserSearch] */
/** and sq.qual_id in [CurriculumSearch] */
) students
WHERE sq.stud_id = students.stud_id
/** and sq.qual_id in [CurriculumSearch]*/
UNION ALL
SELECT sq.stud_id, sq.qual_id, sq.assgn_dte, sq.qual_id_root
FROM pa_stud_qual_relation sq,
pa_qual_relation qr,
(
SELECT sq.stud_id FROM pa_stud_qual sq WHERE 1=1
/** and sq.stud_id in [UserSearch] */
/** and sq.qual_id in [CurriculumSearch] */
UNION
SELECT sq.stud_id FROM pa_stud_qual_relation sq WHERE 1=1
/** and sq.stud_id in [UserSearch] */
/** and sq.qual_id in [CurriculumSearch] */
) students
WHERE sq.stud_id = students.stud_id
AND qr.qual_id_child = sq.qual_id
/** and qr.qual_id_parent in [CurriculumSearch]*/
) sq
) sq,
/**-- Added from smaller query */
(
SELECT su.stud_id, rf.user_desc as REGION
FROM pa_stud_user su
JOIN pa_usrrf_stud rf on rf.col_num = su.col_num
WHERE su.user_value = rf.user_id
AND su.col_num = 300
) JB,
(
SELECT su.stud_id, rf.user_desc as DISTRICT
FROM pa_stud_user su
JOIN pa_usrrf_stud rf on rf.col_num = su.col_num
WHERE su.user_value = rf.user_id
AND su.col_num = 400
) JT
/**-- Added from smaller query */
WHERE sqc.STUD_ID = sq.stud_id
AND sqc.QUAL_ID = sq.qual_id
AND sqc.QUAL_ID_ROOT = sq.qual_id_root
AND sqc.CPNT_TYP_ID = cpt.CPNT_TYP_ID
AND sqc.CPNT_ID = cpt.CPNT_ID
AND sqc.REV_DTE = cpt.REV_DTE
AND sqc.CMPL_STAT_ID = cs.CMPL_STAT_ID
AND s.stud_id = sq.stud_id
AND s.stud_id = userPref.user_id
AND userPref.user_type = 'S'
AND sq.rnum = 1
AND sq.qual_id = q.qual_id
/**-- Added from smaller query */
AND s.stud_id = jb.stud_id
AND s.stud_id = jt.stud_id
/**-- Added from smaller query */
/** and [security:pa_student s]*/
【讨论】：
【参考方案2】：这比你想象的要简单。
选项一（推荐） 将简化的第一个查询变成一个函数（可能嵌入到另一个包中）
FUNCTION get_user_desc(p_stud_id NUMBER,p_col_num NUMBER) RETURN VARCHAR2 IS
BEGIN
FOR q_rec IN (SELECT rf.user_desc user_desc
FROM pa_stud_user su,
pa_usrrf_stud rf
WHERE su.col_num = rf.col_num
AND su.user_value = rf.user_id
AND su.col_num = p_col_num
AND su.stud_id = p_stud_id
) LOOP
RETURN q_rec.user_desc;
END LOOP;
RETURN NULL;
END;
然后将这两列添加到“原始查询”中
get_user_desc(sq.stud_id,300) AS region,
get_user_desc(sq.stud_id,400) AS district
如果您不想创建上述函数，则选择 2
在第二个查询中添加两个新查询作为新列。
SELECT
... ...
( SELECT rf.user_desc as region
FROM pa_stud_user su,
pa_usrrf_stud rf
WHERE su.col_num = rf.col_num
AND su.user_value = rf.user_id
AND su.col_num = 300
AND su.stud_id = sq.stud_id
AND ROWNUM=1) AS region,
( SELECT rf.user_desc as region
FROM pa_stud_user su,
pa_usrrf_stud rf
WHERE su.col_num = rf.col_num
AND su.user_value = rf.user_id
AND su.col_num = 400
AND su.stud_id = sq.stud_id
AND ROWNUM=1) AS district
...
就这么简单。
【讨论】：
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