如何在MySQL中的两列上进行布尔逻辑？

Question

我想在MySql中做一个结合了几个列的select ...类似于这个伪代码：

SELECT payment1_paid AND payment2_paid AS paid_in_full 
FROM denormalized_payments 
WHERE payment1_type = 'check';

修改：payment1_paid和payment2_paid是布尔值。

我不能使用任何其他语言来解决这个问题而不是MySql。

感谢您的帮助！

编辑：对于向我提供求和和连接建议的所有人都很抱歉，但我已经将这些早期答案投票了，因为它们无论如何都很有用。 感谢给大家提供非常快速的答案！

Answer 1

好的，对于逻辑而言，你可以做到

Select (payment1_paid && payment2_paid) as paid_in_full 
from denormalized_payments 
where payment1_type = 'check';

如此处所示。

Answer 2

只做

Select CONCAT(payment1_paid, payment2_paid) as paid_in_full 
from denormalized_payments 
where payment1_type = 'check';

您可以连接任意数量的字段。

Answer 3

如果通过组合意味着连接，那么这将起作用：

select concat(payment1_paid, payment2_paid) as paid_in_full
from denormalized_payments where payment1_type = 'check';

如果通过组合你意味着添加，那么这应该工作：

select payment1_paid + payment2_paid as paid_in_full
from denormalized_payments where payment1_type = 'check';

[编辑]

对于布尔AND：

select payment1_paid && payment2_paid as paid_in_full
from denormalized_payments where payment1_type = 'check';

Answer 4

我不确定，但你的意思是连接吗？

SELECT CONCAT(ColumnA, ColumnB) AS ColumnZ
FROM Table

Answer 5

SELECT IF（payment1_paid = 1 AND payment2_paid = 1,1,0）AS paid_in_fill

Answer 6

如果是字符串（或者你想像字符串一样对待要组合的列），你可以使用 CONCAT 和 CONCAT_WS 。祝你好运！

Answer 7

select (payment1_paid && payment2_paid) as paid_in_full
from denormalized_payments where payment1_type = 'check';