MySQL查询与A列不同，所有查询在B列中都没有特定值

Question

Could someone kindly point me to the right direction to seek further or give me any hints regarding the following task?

I'd like to list all the distinct values from a MySQL table from column A that don't have a specific value in column B. I mean none of the same A values have this specific value in B in any of there rows. Taking the following table (let this specific value be 1):

column A  | column B
----------------------
apple     |
apple     |
apple     | 1
banana    | anything
banana    |
lemon     |
lemon     | 1
orange    |

I'd like to get the following result:

banana
orange

Thanks.

Answer 1

Since there are null values, I have also added a nvl condition to column B .

ORACLE:

SELECT DISTINCT COLUMN_A  FROM MY_TABLE
WHERE COLUMN_A  NOT IN (SELECT COLUMN_A FROM MY_TABLE WHERE nvl(COLUMN_B,'dummy')  = '1');

MYSQL:

SELECT DISTINCT COLUMN_A  FROM MY_TABLE
WHERE COLUMN_A  NOT IN (SELECT COLUMN_A FROM MY_TABLE WHERE IFNULL(COLUMN_B,'dummy')  = '1');

Answer 2

This might help you:

SELECT DISTINCT A FROM MY_TABLE
WHERE A NOT IN (SELECT DISTINCT A FROM MY_TABLE WHERE B = 1)

Answer 3

SELECT * FROM your_Table WHERE Column_A NOT IN(
    SELECT Column_A FROM Your_Table WHERE Column_B = '1'
)

Answer 4

This statement gives you the expected result:

select COLUMNA from myTable where COLUMNA not in (select distinct COLUMNA from myTable where columnB
=1) group by COLUMNA;