Oracle连接SQL问题

Question

我有以下三个表：

CREATE TABLE USER_STATUS ("UID" varchar2(7), "STAT_ID" varchar2(11)) ;
INSERT ALL 
    INTO USER_STATUS ("UID", "STAT_ID") VALUES ('UID_001', 'STAT_ID_001')
    INTO USER_STATUS ("UID", "STAT_ID") VALUES ('UID_001', NULL)
    INTO USER_STATUS ("UID", "STAT_ID") VALUES ('UID_001', NULL)
    INTO USER_STATUS ("UID", "STAT_ID") VALUES ('UID_002', 'STAT_ID_002')
    INTO USER_STATUS ("UID", "STAT_ID") VALUES ('UID_002', NULL)
    INTO USER_STATUS ("UID", "STAT_ID") VALUES ('UID_003', 'STAT_ID_003')
SELECT * FROM dual;


CREATE TABLE STATUS_LKUP ("LKUP_ID" varchar2(11), "STAT_CODE" varchar2(11), "STAT_ID" varchar2(11), "STATUS" varchar2(20));
INSERT ALL 
    INTO STATUS_LKUP ("LKUP_ID", "STAT_CODE", "STAT_ID", "STATUS") VALUES ('LKUP_ID_001', 'ST_CODE_001', 'STAT_ID_001', 'Processing')
    INTO STATUS_LKUP ("LKUP_ID", "STAT_CODE", "STAT_ID", "STATUS") VALUES ('LKUP_ID_002', 'ST_CODE_002', 'STAT_ID_001', 'Processing')
    INTO STATUS_LKUP ("LKUP_ID", "STAT_CODE", "STAT_ID", "STATUS") VALUES ('LKUP_ID_003', 'ST_CODE_003', 'STAT_ID_001', 'Processing')
    INTO STATUS_LKUP ("LKUP_ID", "STAT_CODE", "STAT_ID", "STATUS") VALUES ('LKUP_ID_004', 'ST_CODE_004', 'STAT_ID_001', 'Processing')
    INTO STATUS_LKUP ("LKUP_ID", "STAT_CODE", "STAT_ID", "STATUS") VALUES ('LKUP_ID_005', 'ST_CODE_011', 'STAT_ID_001', 'Issue')
    INTO STATUS_LKUP ("LKUP_ID", "STAT_CODE", "STAT_ID", "STATUS") VALUES ('LKUP_ID_006', 'ST_CODE_012', 'STAT_ID_001', 'Issue')
    INTO STATUS_LKUP ("LKUP_ID", "STAT_CODE", "STAT_ID", "STATUS") VALUES ('LKUP_ID_007', 'ST_CODE_013', 'STAT_ID_001', 'Issue')
    INTO STATUS_LKUP ("LKUP_ID", "STAT_CODE", "STAT_ID", "STATUS") VALUES ('LKUP_ID_008', 'ST_CODE_014', 'STAT_ID_001', 'Issue')
    INTO STATUS_LKUP ("LKUP_ID", "STAT_CODE", "STAT_ID", "STATUS") VALUES ('LKUP_ID_009', 'ST_CODE_015', 'STAT_ID_001', 'Issue')
    INTO STATUS_LKUP ("LKUP_ID", "STAT_CODE", "STAT_ID", "STATUS") VALUES ('LKUP_ID_010', 'ST_CODE_021', 'STAT_ID_001', 'Done')
    INTO STATUS_LKUP ("LKUP_ID", "STAT_CODE", "STAT_ID", "STATUS") VALUES ('LKUP_ID_011', 'ST_CODE_022', 'STAT_ID_001', 'Done')
    INTO STATUS_LKUP ("LKUP_ID", "STAT_CODE", "STAT_ID", "STATUS") VALUES ('LKUP_ID_012', 'ST_CODE_031', 'STAT_ID_001', 'Started')
    INTO STATUS_LKUP ("LKUP_ID", "STAT_CODE", "STAT_ID", "STATUS") VALUES ('LKUP_ID_013', 'ST_CODE_032', 'STAT_ID_001', 'Started')
    INTO STATUS_LKUP ("LKUP_ID", "STAT_CODE", "STAT_ID", "STATUS") VALUES ('LKUP_ID_014', 'ST_CODE_002', 'STAT_ID_002', 'Processing (Sent)')
    INTO STATUS_LKUP ("LKUP_ID", "STAT_CODE", "STAT_ID", "STATUS") VALUES ('LKUP_ID_015', 'ST_CODE_004', 'STAT_ID_002', 'Processing (Waiting)')
    INTO STATUS_LKUP ("LKUP_ID", "STAT_CODE", "STAT_ID", "STATUS")  VALUES ('LKUP_ID_016', 'ST_CODE_014', 'STAT_ID_002', 'Issue in Prod')
    INTO STATUS_LKUP ("LKUP_ID", "STAT_CODE", "STAT_ID", "STATUS") VALUES ('LKUP_ID_017', 'ST_CODE_012', 'STAT_ID_002', 'Issue in Prod')
    INTO STATUS_LKUP ("LKUP_ID", "STAT_CODE", "STAT_ID", "STATUS")  VALUES ('LKUP_ID_018', 'ST_CODE_021', 'STAT_ID_002', 'Done')
SELECT * FROM dual;


CREATE TABLE CORE ("CORE_ID" varchar2(11), "STAT_CODE" varchar2(11));

INSERT ALL 
    INTO CORE ("CORE_ID", "STAT_CODE") VALUES ('CORE_ID_001', 'ST_CODE_001')
    INTO CORE ("CORE_ID", "STAT_CODE") VALUES ('CORE_ID_002', 'ST_CODE_012')
    INTO CORE ("CORE_ID", "STAT_CODE") VALUES ('CORE_ID_003', 'ST_CODE_021')
    INTO CORE ("CORE_ID", "STAT_CODE") VALUES ('CORE_ID_004', 'ST_CODE_012')
    INTO CORE ("CORE_ID", "STAT_CODE") VALUES ('CORE_ID_005', 'ST_CODE_012')
    INTO CORE ("CORE_ID", "STAT_CODE") VALUES ('CORE_ID_006', 'ST_CODE_021')
    INTO CORE ("CORE_ID", "STAT_CODE") VALUES ('CORE_ID_007', 'ST_CODE_001')
    INTO CORE ("CORE_ID", "STAT_CODE") VALUES ('CORE_ID_008', 'ST_CODE_003')
    INTO CORE ("CORE_ID", "STAT_CODE") VALUES ('CORE_ID_009', 'ST_CODE_012')
    INTO CORE ("CORE_ID", "STAT_CODE") VALUES ('CORE_ID_010', 'ST_CODE_021')
    INTO CORE ("CORE_ID", "STAT_CODE") VALUES ('CORE_ID_011', 'ST_CODE_001')
    INTO CORE ("CORE_ID", "STAT_CODE") VALUES ('CORE_ID_013', 'ST_CODE_004')
SELECT * FROM dual;

请查看 -> Oracle SQL Fiddle

表已在 Oracle 数据库中创建。现在根据用户传递的 UID，我需要按如下方式检索他们的核心和状态：

单击此处以查看预期结果

到目前为止，我尝试检索结果，但无法将它们连接起来。

SELECT STLK.STAT_CODE, STLK.STATUS FROM STATUS_LKUP STLK WHERE STLK.STAT_ID IN (SELECT USRST.STAT_ID FROM USER_STATUS USRST WHERE USRST.UID = 'UID_001');

请帮忙。

信息提供：这不是一项作业任务。实际的表格很复杂，这些只是为了更好的解释而转换的。

提前感谢您的帮助。

- heemaniroberts

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你能说明用于确定结果集的逻辑吗？ - David Aldridge

+1 给这个示例程序点赞... :) - Joachim Isaksson

逻辑是..1. 将UID传递到USER_STATUS表并获取STAT_ID列表。2. 将步骤1中的STAT_ID列表传递到STATUS_LKUP表并获取STAT_CODE列表。3. 将STAT_CODE列表传递到CORE表并获取该STAT_CODE的CORE_ID列表。需要获取特定UID的CORE_ID、其状态和STAT_CODE。 - heemaniroberts

Answer 1

尝试

SELECT l.STATUS, 
       l.STAT_CODE,
       c.CORE_ID
  FROM STATUS_LKUP l JOIN CORE c
    ON l.STAT_CODE = c.STAT_CODE JOIN USER_STATUS u
    ON l.STAT_ID = u.STAT_ID
 WHERE u."UID" = 'UID_002'
 ORDER BY l.STATUS DESC, l.STAT_CODE

SQLFiddle

{{链接1:SQLFiddle}}

- peterm

Answer 2

一个相当直接的连接;

SELECT sl."STATUS", sl."STAT_CODE", c."CORE_ID"
FROM USER_STATUS us
JOIN STATUS_LKUP sl
  ON us."STAT_ID" = sl."STAT_ID"
JOIN CORE c
  ON c."STAT_CODE" = sl."STAT_CODE"
WHERE "UID" = 'UID_001'
ORDER BY "STATUS", "LKUP_ID"

用于测试的SQLfiddle。

- Joachim Isaksson

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谢谢你的帮助。看来我在连接方面还不够熟练。感谢。 - heemaniroberts

Answer 3

这个查询的版本是可行的：

SELECT STLK.STAT_CODE, STLK.STATUS
FROM STATUS_LKUP STLK
WHERE STLK.STAT_ID IN (SELECT USRST.STAT_ID
                       FROM USER_STATUS USRST
                       WHERE USRST."UID" = 'UID_001'
                      );

UID 是 Oracle 中的保留字（请参见此处），因此需要使用双引号。

- Gordon Linoff

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核心ID未列出。需要获取特定UID的CORE_ID、状态和STAT_CODE。 - heemaniroberts