SQL帮助 - 关键字"EXISTS"附近的语法不正确

Question

我的sql有问题(我对sql比较新).我无法弄清楚为什么我会收到语法错误.任何帮助,将不胜感激.

提前致谢.

SELECT *
FROM table_name_1
WHERE
column_A IN ('Lorem', 'Ipsum', 'Test') 
AND column_B NOT EXISTS
    (
    SELECT column_C 
    FROM table_name_2
    WHERE Date  >= CURDATE()
    )

Answer 1

您无法将NOT EXISTS与列值进行比较.

SELECT *
FROM table_name_1
WHERE
column_A IN ('Lorem', 'Ipsum', 'Test') 
AND NOT EXISTS
    (
    SELECT 1 
    FROM table_name_2
    WHERE Date  >= CURDATE()
    AND column_c = column_b
    )

或使用IN

SELECT *
FROM table_name_1
WHERE
column_A IN ('Lorem', 'Ipsum', 'Test') 
AND column_B NOT IN
    (
    SELECT column_C 
    FROM table_name_2
    WHERE Date  >= CURDATE()
    )