Question

我有两张桌子，第一张是雇员，其中包括＆＃39; employee_id＆＃39; company_id＆＃39;和邮政编码。第二个表有company_id，company_postcode。

大量员工缺少邮政编码，或者由于平台客户中的错误，客户可以在邮政编码部分输入任何值，因此可能是街道名称，电话号码，出生日期甚至是000000之类的东西。我想尽可能用company_post代码替换丢失/错误的邮政编码，如果公司邮政编码也丢失或错误，我需要将其替换为他们的同事邮政编码之一。谢谢你，埃里克，我同意你的意见，很抱歉没有分享我的疑问，

SELECT 
    e.id,
    e.company_id,
    e.postcode,
    c.reg_address_postcode,
    postcode2,
    CASE
        WHEN
            postcode NOT REGEXP '^[0-9]$'
                OR postcode IS NOT NULL
                OR postcode != ''
        THEN
            postcode
        WHEN
            postcode REGEXP '^[0-9]$'
                OR postcode IS NULL
                OR postcode = ''
                AND c.reg_address_postcode NOT REGEXP '^[0-9]$'
                OR c.reg_address_postcode IS NOT NULL
                OR c.reg_address_postcode != ''
        THEN
            c.reg_address_postcode
        WHEN
            postcode REGEXP '^[0-9]$'
                OR postcode IS NULL
                OR postcode = ''
                AND c.reg_address_postcode REGEXP '^[0-9]$'
                OR c.reg_address_postcode IS NULL
                OR c.reg_address_postcode = ''
        THEN
            postcode2
    END AS new_postcode
FROM
    employees e
        LEFT JOIN
    companies c ON e.company_id = c.id
        LEFT JOIN
    (SELECT 
        MAX(e.id),
            e.company_id,
            TRIM(postcode) postcode2,
            c.reg_address_postcode
    FROM
        employees e
    LEFT JOIN companies c ON e.company_id = c.id
    WHERE
        e.postcode NOT REGEXP '^[0-9]'
            AND (e.postcode != ''
            OR e.postcode IS NOT NULL)
            AND (TRIM(e.postcode) < 4
            OR TRIM(e.postcode) > 10)
    GROUP BY company_id) o ON e.company_id = o.company_id

Answer 1

我认为问题出在你的CASE。 AND优先于OR。所以你的代码

WHEN postcode REGEXP '^[0-9]$'
    OR postcode IS NULL
    OR postcode = ''
    AND c.reg_address_postcode NOT REGEXP '^[0-9]$'
    OR c.reg_address_postcode IS NOT NULL
    OR c.reg_address_postcode != ''
THEN
    c.reg_address_postcode

被视为

WHEN postcode REGEXP '^[0-9]$'
    OR postcode IS NULL
    OR (postcode = ''
    AND c.reg_address_postcode NOT REGEXP '^[0-9]$')
    OR c.reg_address_postcode IS NOT NULL
    OR c.reg_address_postcode != ''
THEN
    c.reg_address_postcode

我肯定不是你想要的。尝试将括号放在OR

中

WHEN (postcode REGEXP '^[0-9]$'
    OR postcode IS NULL
    OR postcode = '')
    AND (c.reg_address_postcode NOT REGEXP '^[0-9]$'
    OR c.reg_address_postcode IS NOT NULL
    OR c.reg_address_postcode != '')
THEN
    c.reg_address_postcode

由公司或同事邮政编码替换员工丢失的邮政编码

1 个答案: