mysql - NOT IN AND IN 条件 mysql

Question

我有如下的 SQL 查询设计。

SELECT (THIS ITEMS) 
FROM (TABLES) 
WHERE(SOME CONDITION) AND NOT IN (CONDITION) AND IN (CONDITION)

但未按要求获得正确的输出，因为“输入”条件无法正常工作

Answer 1

您需要一列进行比较。正确的语法是（注意column_expression）：

SELECT <select_list>
FROM <table_expression>
WHERE <column_expression> [NOT] IN (<comparison_list>)

例如，

SELECT col1, col2
FROM tab
WHERE col3 IN ('yes', 'no')
AND col4 NOT IN ('no', 'maybe')

---

请注意，您还可以使用单列结果集而不是静态比较列表，如下所示：

SELECT col1, col2
FROM tab
WHERE col3 IN (SELECT filterValues FROM table2)

但在这种情况下使用EXISTS子句更为理想：

SELECT col1, col2
FROM tab
WHERE EXISTS (SELECT 1 FROM table2 WHERE filterValues = col3)

Answer 2

在某些情况下，您可能需要括号。

Example 1:
Select all persons who are active and have an invoice 
Person->Invoice (1 to Many)
SELECT * FROM person WHERE active=1 AND person_id IN (SELECT person_id FROM invoice)

Example 2:
Select all person who are active, do not have a cat, and have an invoice

SELECT * FROM person WHERE active=1 AND person_id NOT IN (SELECT person_id FROM people_with_cats) AND person_id IN  (SELECT person_id FROM invoice)