联系人的 Mysql 语法错误

Question

嘿伙计们，出于某种原因，我的 CONCATS 出现语法错误，这很奇怪，因为它几乎是从另一个复制/粘贴的我使用 CONCATS 的查询之一可以完美运行吗？

这是错误的查询

SELECT 
    brand, 
    case_count AS case, 
    variety, 
    style, 
    grower_lot AS lot, 
    pack_date AS date, 
    CONCAT(berry_size1, "-", berry_size2, "/", berry_size3, "-", berry_size4) AS size, 
    CONCAT(color1, "-", color2) AS color, 
    CONCAT(stem1, "-", stem2, "-", stem3) AS stem_cndt, 
    CONCAT(bunch_count1, "-", bunch_count2, "-", bunch_count3) AS bnch_cnt, 
    CONCAT(shatter1, "-", shatter2) AS shatter, 
    CONCAT(splits1, "-", splits2) AS split, 
    CONCAT(decay_count1, "-", decay_count2) AS decay, 
    CONCAT(wet_sticky1, "-", wet_sticky2) AS wet_sticky, 
    overall_quality AS quality, 
    CONCAT(sugar_brix1, "-", sugar_brix2) brix, 
    overall_condition AS condition, 
    rating, 
    inspector AS insp, 
    comments 
FROM `lot`

#1064 - 您的 SQL 语法有误；查看与您的 MySQL 服务器版本对应的手册，了解在第 3 行的 'case, variety, style, grower_lot AS lot, pack_date AS date, ' 附近使用的正确语法

这是一个似乎有效的

SELECT
        shipper, 
        po, 
        commodity as comm, 
        count, 
        size, 
        label, 
        variety, 
        pack_date AS date, 
        grower_lot AS lot, 
        CONCAT(color1, "-", color2) AS color, 
        CONCAT(sizing1, "-", sizing2, " / ", "sizing3", "-", sizing4 ) AS size, 
        CONCAT(firmness1, "-", firmness2) AS firmness, 
        CONCAT(scars_count1, "-", scars_count2) AS scars, 
        CONCAT(bruise_count2, "-", bruise_count2) AS bruise, 
        CONCAT(decay_count1, "-", decay_count2) AS decay_cnt, 
        CONCAT(sugar_brix1, "-", sugar_brix2) brix, 
        rating, 
        inspector AS insp, 
        comments
FROM `berries`

Answer 1

CONCAT 本身不是问题，但是 case 是 MySQL 中的保留字，需要反引号转义。