Question

嘿伙计们因为某些原因我的CONCATS上出现语法错误，这非常奇怪，因为它几乎是来自另一个的复制/粘贴我使用CONCATS的一个查询是否完美无缺？

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语法出错;查看与您的MySQL服务器版本相对应的手册，以便在“案例，种类，风格，grower_lot AS批次，pack_date AS日期”附近使用正确的语法，在第3行

这是一个似乎有效的方法

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case是MySQL中的保留字，需要进行反向转义。

Answer 2

case是MySQL的保留字。如果要将其用作列别名，则需要将其放在反引号中。

此处提供的保留字的完整列表：http://dev.mysql.com/doc/refman/5.5/en/reserved-words.html

CONTACTs的Mysql语法错误

2 个答案: