Question

INSERT INTO data_prediction_model
select *, ( 
CASE WHEN ( offer_category like 'Everyday Low Prices on Receipe%'
OR offer_category like 'Every Day Low Prices%'

) THEN "EDLP"


ELSE
CASE WHEN (offer_category like 'Buy More & Save More%'
OR offer_category like 'Buy and Get Free'
) THEN "B1G1"

ELSE 
CASE WHEN (offer_category like 'Offer on Activation/Qualification%'
OR offer_category like 'Save on Purchase of select Products/Plans%'
OR offer_category like 'Coupons Offers%'
OR offer_category like 'Digital Coupons Offers%'
OR offer_category like 'Discounted Products%'
OR offer_category like 'Exchange Offers%'
OR offer_category like 'Multiple Brand Offers%'
OR offer_category like 'Free with Rebate'
) THEN "Discounts"

END END END) AS offer_category
FROM data_offer;

Answer 1

从你说的sql查询中，我假设你的CASE语句错误

INSERT INTO data_prediction_model
select *, ( 
CASE WHEN ( offer_category like 'Everyday Low Prices on Receipe%' OR 
            offer_category like 'Every Day Low Prices%' ) 
     THEN "EDLP"
     WHEN (offer_category like 'Buy More & Save More%' OR 
           offer_category like 'Buy and Get Free') 
     THEN "B1G1"
     WHEN (offer_category like 'Offer on Activation/Qualification%' OR           
           offer_category like 'Save on Purchase of select Products/Plans%' OR
           offer_category like 'Coupons Offers%' OR 
           offer_category like 'Digital Coupons Offers%' OR 
           offer_category like 'Discounted Products%' OR 
           offer_category like 'Exchange Offers%' OR 
           offer_category like 'Multiple Brand Offers%' OR 
           offer_category like 'Free with Rebate' ) 
     THEN "Discounts"
END) AS offer_category
FROM data_offer;

正确的CASE声明顺序，应该像这样的模式

CASE 
    WHEN condition 1 THEN value 1
    WHEN condition 2 THEN value 2
    ELSE value 3
END

而不是你做的模式，看起来像这样

CASE
     WHEN condition 1 THEN value 1
ELSE CASE 
     WHEN condition 2 THEN value 2
     END 
END

希望对你有所帮助。

Answer 2

1136错误与表和插入中的列不匹配有关。

例如：

mysql> create table test (id int, name varchar(20));
Query OK, 0 rows affected (0.13 sec)

mysql> insert into test values (1, 'test', 'hello');
ERROR 1136 (21S01): Column count doesn't match value count at row 1

请注意，以'hello'的形式提供附加值会引发1136错误。表有2列。提供正确数据类型的2个值将成功：

mysql> insert into test values (1, 'test');
Query OK, 1 row affected (0.03 sec)

仔细检查data_prediction_model中的列计数与data_offer + case语句中的列计数相同。 Case语句创建一个新的插入字段。

编辑：

要解决此问题，请列出data_prediction_model中的所有列。列出data_offer中的所有列。 data_offer应该比data_prediction_model少1列。

sql中有1136错误

2 个答案: