Question

我需要在以下查询尝试中加入四个表：

SELECT PROJECT.PROJECT_ID
     , PROJECT_STATUS.PRO_STATUS_NAME
     , PROJECT.PROJECT_NAME
     , SKILL.SKILL_NAME
FROM PROJECT_STATUS
INNER JOIN PROJECT    ON PROJECT_STATUS.PRO_STATUS_ID = PROJECT.PRO_STATUS_ID
INNER JOIN PRO_SKILL  ON SKILL.SKILL_ID = PRO_SKILL.SKILL_ID 
                     AND PRO_SKILL.PROJECT_ID = PROJECT.PROJECT_ID;

不幸的是，PRO_SKILL表使用了复合键，因此在尝试运行查询时出现以下错误：

消息4104，级别16，状态1，行6多部分标识符＆＃34; SKILL.SKILL_ID＆＃34;无法受约束。 Msg 4104，Level 16，State 1，Line 1多部分标识符＆＃34; SKILL.SKILL_NAME＆＃34;无法受约束。

有没有办法正确连接使用复合键的表？

PRO_SKILL有一个复合键： PROJECT_ID和SKILL_ID

技能只有SKILL_ID的常规PK

提前感谢您的帮助！

Answer 1

你错过了技能表，试试这个....

SELECT PROJECT.PROJECT_ID
     , PROJECT_STATUS.PRO_STATUS_NAME
     , PROJECT.PROJECT_NAME
     , SKILL.SKILL_NAME
FROM PROJECT_STATUS
INNER JOIN PROJECT    ON PROJECT_STATUS.PRO_STATUS_ID = PROJECT.PRO_STATUS_ID
INNER JOIN PRO_SKILL  ON PRO_SKILL.PROJECT_ID = PROJECT.PROJECT_ID
INNER JOIN SKILL      ON SKILL.SKILL_ID = PRO_SKILL.SKILL_ID

SQL Server使用具有复合键的表加入

1 个答案: