Question

FROM   tab1               a,
       tab2                l,
       tab3     cp,
       tab4 jic,
       tab5              c
WHERE  a.member_number = l.member_number
AND    l.challenge_phrase = cp.challenge_phrase_id(+)
AND    IFNULL(a.join_ip_address, a.update_ip_address) = jic.join_ip_address(+)
AND    IFNULL(jic.country_code, '-') = c.iso_code(+)
AND    l.login NOT LIKE 'jfaux%'
AND    a.join_date >= SYSDATE - 14;

如何将此代码转换为左外连接的mysql格式？

Answer 1

ORACLE LEFT（或RIGHT）JOIN完整语法相当于MySQL（除了MySQL中没有FULL OUTER JOIN）：

<强> ORACLE ：

SELECT a.field, b.field
FROM tableA a LEFT JOIN tableB b on (a.id = b.id)

也

SELECT a.field, b.field
FROM tableA a, tableB b
WHERE a.id = b.id (+)

<强>的MySQL ：

SELECT a.field, b.field
FROM tableA a LEFT JOIN tableB b on (a.id = b.id)

从oracle到mysql的复杂连接操作转换

1 个答案: